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Driver core patches for 4.19-rc1
Here are all of the driver core and related patches for 4.19-rc1. Nothing huge here, just a number of small cleanups and the ability to now stop the deferred probing after init happens. All of these have been in linux-next for a while with only a merge issue reported. That merge issue is in fs/sysfs/group.c and Stephen has posted the diff of what it should be to resolve this. I'll follow up with that diff to this pull request. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCW3g86Q8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ynyXQCePaZSW8wft4b7nLN8RdZ98ATBru0Ani10lrJa HQeQJRNbWU1AZ0ym7695 =tOaH -----END PGP SIGNATURE----- Merge tag 'driver-core-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core updates from Greg KH: "Here are all of the driver core and related patches for 4.19-rc1. Nothing huge here, just a number of small cleanups and the ability to now stop the deferred probing after init happens. All of these have been in linux-next for a while with only a merge issue reported" * tag 'driver-core-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (21 commits) base: core: Remove WARN_ON from link dependencies check drivers/base: stop new probing during shutdown drivers: core: Remove glue dirs from sysfs earlier driver core: remove unnecessary function extern declare sysfs.h: fix non-kernel-doc comment PM / Domains: Stop deferring probe at the end of initcall iommu: Remove IOMMU_OF_DECLARE iommu: Stop deferring probe at end of initcalls pinctrl: Support stopping deferred probe after initcalls dt-bindings: pinctrl: add a 'pinctrl-use-default' property driver core: allow stopping deferred probe after init driver core: add a debugfs entry to show deferred devices sysfs: Fix internal_create_group() for named group updates base: fix order of OF initialization linux/device.h: fix kernel-doc notation warning Documentation: update firmware loader fallback reference kobject: Replace strncpy with memcpy drivers: base: cacheinfo: use OF property_read_u32 instead of get_property,read_number kernfs: Replace strncpy with memcpy device: Add #define dev_fmt similar to #define pr_fmt ...
This commit is contained in:
Linus Torvalds
commit
a18d783fed
@ -812,6 +812,15 @@
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Defaults to the default architecture's huge page size
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if not specified.
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deferred_probe_timeout=
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[KNL] Debugging option to set a timeout in seconds for
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deferred probe to give up waiting on dependencies to
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probe. Only specific dependencies (subsystems or
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drivers) that have opted in will be ignored. A timeout of 0
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will timeout at the end of initcalls. This option will also
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dump out devices still on the deferred probe list after
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retrying.
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dhash_entries= [KNL]
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Set number of hash buckets for dentry cache.
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@ -103,6 +103,12 @@ Optional properties:
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#pinctrl-cells: Number of pin control cells in addition to the index within the
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pin controller device instance
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pinctrl-use-default: Boolean. Indicates that the OS can use the boot default
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pin configuration. This allows using an OS that does not have a
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driver for the pin controller. This property can be set either
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globally for the pin controller or in child nodes for individual
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pin group control.
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Pin controller devices should contain the pin configuration nodes that client
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devices reference.
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@ -92,7 +92,7 @@ the loading file.
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The firmware device used to help load firmware using sysfs is only created if
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direct firmware loading fails and if the fallback mechanism is enabled for your
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firmware request, this is set up with fw_load_from_user_helper(). It is
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firmware request, this is set up with :c:func:`firmware_fallback_sysfs`. It is
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important to re-iterate that no device is created if a direct filesystem lookup
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succeeded.
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@ -108,6 +108,11 @@ firmware_data_read() and firmware_loading_show() are just provided for the
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test_firmware driver for testing, they are not called in normal use or
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expected to be used regularly by userspace.
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firmware_fallback_sysfs
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-----------------------
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.. kernel-doc:: drivers/base/firmware_loader/fallback.c
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:functions: firmware_fallback_sysfs
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Firmware kobject uevent fallback mechanism
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==========================================
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@ -84,8 +84,6 @@ struct device_private {
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#define to_device_private_bus(obj) \
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container_of(obj, struct device_private, knode_bus)
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extern int device_private_init(struct device *dev);
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/* initialisation functions */
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extern int devices_init(void);
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extern int buses_init(void);
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@ -74,52 +74,48 @@ static inline int get_cacheinfo_idx(enum cache_type type)
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static void cache_size(struct cacheinfo *this_leaf, struct device_node *np)
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{
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const char *propname;
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const __be32 *cache_size;
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int ct_idx;
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ct_idx = get_cacheinfo_idx(this_leaf->type);
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propname = cache_type_info[ct_idx].size_prop;
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cache_size = of_get_property(np, propname, NULL);
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if (cache_size)
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this_leaf->size = of_read_number(cache_size, 1);
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if (of_property_read_u32(np, propname, &this_leaf->size))
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this_leaf->size = 0;
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}
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/* not cache_line_size() because that's a macro in include/linux/cache.h */
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static void cache_get_line_size(struct cacheinfo *this_leaf,
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struct device_node *np)
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{
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const __be32 *line_size;
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int i, lim, ct_idx;
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ct_idx = get_cacheinfo_idx(this_leaf->type);
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lim = ARRAY_SIZE(cache_type_info[ct_idx].line_size_props);
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for (i = 0; i < lim; i++) {
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int ret;
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u32 line_size;
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const char *propname;
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propname = cache_type_info[ct_idx].line_size_props[i];
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line_size = of_get_property(np, propname, NULL);
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if (line_size)
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ret = of_property_read_u32(np, propname, &line_size);
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if (!ret) {
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this_leaf->coherency_line_size = line_size;
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break;
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}
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}
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if (line_size)
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this_leaf->coherency_line_size = of_read_number(line_size, 1);
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}
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static void cache_nr_sets(struct cacheinfo *this_leaf, struct device_node *np)
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{
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const char *propname;
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const __be32 *nr_sets;
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int ct_idx;
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ct_idx = get_cacheinfo_idx(this_leaf->type);
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propname = cache_type_info[ct_idx].nr_sets_prop;
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nr_sets = of_get_property(np, propname, NULL);
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if (nr_sets)
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this_leaf->number_of_sets = of_read_number(nr_sets, 1);
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if (of_property_read_u32(np, propname, &this_leaf->number_of_sets))
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this_leaf->number_of_sets = 0;
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}
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static void cache_associativity(struct cacheinfo *this_leaf)
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@ -105,7 +105,7 @@ static int device_is_dependent(struct device *dev, void *target)
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struct device_link *link;
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int ret;
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if (WARN_ON(dev == target))
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if (dev == target)
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return 1;
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ret = device_for_each_child(dev, target, device_is_dependent);
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@ -113,7 +113,7 @@ static int device_is_dependent(struct device *dev, void *target)
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return ret;
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list_for_each_entry(link, &dev->links.consumers, s_node) {
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if (WARN_ON(link->consumer == target))
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if (link->consumer == target)
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return 1;
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ret = device_is_dependent(link->consumer, target);
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@ -1647,6 +1647,8 @@ static void cleanup_glue_dir(struct device *dev, struct kobject *glue_dir)
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return;
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mutex_lock(&gdp_mutex);
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if (!kobject_has_children(glue_dir))
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kobject_del(glue_dir);
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kobject_put(glue_dir);
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mutex_unlock(&gdp_mutex);
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}
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@ -1786,7 +1788,7 @@ static void device_remove_sys_dev_entry(struct device *dev)
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}
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}
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int device_private_init(struct device *dev)
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static int device_private_init(struct device *dev)
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{
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dev->p = kzalloc(sizeof(*dev->p), GFP_KERNEL);
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if (!dev->p)
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@ -2859,6 +2861,9 @@ void device_shutdown(void)
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{
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struct device *dev, *parent;
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wait_for_device_probe();
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device_block_probing();
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spin_lock(&devices_kset->list_lock);
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/*
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* Walk the devices list backward, shutting down each in turn.
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@ -3052,12 +3057,12 @@ void func(const struct device *dev, const char *fmt, ...) \
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} \
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EXPORT_SYMBOL(func);
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define_dev_printk_level(dev_emerg, KERN_EMERG);
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define_dev_printk_level(dev_alert, KERN_ALERT);
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define_dev_printk_level(dev_crit, KERN_CRIT);
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define_dev_printk_level(dev_err, KERN_ERR);
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define_dev_printk_level(dev_warn, KERN_WARNING);
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define_dev_printk_level(dev_notice, KERN_NOTICE);
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define_dev_printk_level(_dev_emerg, KERN_EMERG);
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define_dev_printk_level(_dev_alert, KERN_ALERT);
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define_dev_printk_level(_dev_crit, KERN_CRIT);
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define_dev_printk_level(_dev_err, KERN_ERR);
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define_dev_printk_level(_dev_warn, KERN_WARNING);
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define_dev_printk_level(_dev_notice, KERN_NOTICE);
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define_dev_printk_level(_dev_info, KERN_INFO);
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#endif
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@ -16,6 +16,7 @@
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* Copyright (c) 2007-2009 Novell Inc.
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*/
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#include <linux/debugfs.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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@ -53,6 +54,7 @@ static DEFINE_MUTEX(deferred_probe_mutex);
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static LIST_HEAD(deferred_probe_pending_list);
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static LIST_HEAD(deferred_probe_active_list);
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static atomic_t deferred_trigger_count = ATOMIC_INIT(0);
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static struct dentry *deferred_devices;
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static bool initcalls_done;
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/*
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@ -62,26 +64,6 @@ static bool initcalls_done;
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*/
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static bool defer_all_probes;
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/*
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* For initcall_debug, show the deferred probes executed in late_initcall
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* processing.
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*/
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static void deferred_probe_debug(struct device *dev)
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{
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ktime_t calltime, delta, rettime;
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unsigned long long duration;
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printk(KERN_DEBUG "deferred probe %s @ %i\n", dev_name(dev),
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task_pid_nr(current));
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calltime = ktime_get();
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bus_probe_device(dev);
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rettime = ktime_get();
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delta = ktime_sub(rettime, calltime);
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duration = (unsigned long long) ktime_to_ns(delta) >> 10;
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printk(KERN_DEBUG "deferred probe %s returned after %lld usecs\n",
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dev_name(dev), duration);
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}
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/*
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* deferred_probe_work_func() - Retry probing devices in the active list.
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*/
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@ -125,11 +107,7 @@ static void deferred_probe_work_func(struct work_struct *work)
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device_pm_move_to_tail(dev);
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dev_dbg(dev, "Retrying from deferred list\n");
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if (initcall_debug && !initcalls_done)
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deferred_probe_debug(dev);
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else
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bus_probe_device(dev);
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bus_probe_device(dev);
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mutex_lock(&deferred_probe_mutex);
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put_device(dev);
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@ -224,6 +202,69 @@ void device_unblock_probing(void)
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driver_deferred_probe_trigger();
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}
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/*
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* deferred_devs_show() - Show the devices in the deferred probe pending list.
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*/
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static int deferred_devs_show(struct seq_file *s, void *data)
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{
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struct device_private *curr;
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mutex_lock(&deferred_probe_mutex);
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list_for_each_entry(curr, &deferred_probe_pending_list, deferred_probe)
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seq_printf(s, "%s\n", dev_name(curr->device));
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mutex_unlock(&deferred_probe_mutex);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(deferred_devs);
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static int deferred_probe_timeout = -1;
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static int __init deferred_probe_timeout_setup(char *str)
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{
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deferred_probe_timeout = simple_strtol(str, NULL, 10);
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return 1;
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}
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__setup("deferred_probe_timeout=", deferred_probe_timeout_setup);
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/**
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* driver_deferred_probe_check_state() - Check deferred probe state
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* @dev: device to check
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*
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* Returns -ENODEV if init is done and all built-in drivers have had a chance
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* to probe (i.e. initcalls are done), -ETIMEDOUT if deferred probe debug
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* timeout has expired, or -EPROBE_DEFER if none of those conditions are met.
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*
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* Drivers or subsystems can opt-in to calling this function instead of directly
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* returning -EPROBE_DEFER.
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*/
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int driver_deferred_probe_check_state(struct device *dev)
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{
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if (initcalls_done) {
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if (!deferred_probe_timeout) {
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dev_WARN(dev, "deferred probe timeout, ignoring dependency");
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return -ETIMEDOUT;
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}
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dev_warn(dev, "ignoring dependency for device, assuming no driver");
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return -ENODEV;
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}
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return -EPROBE_DEFER;
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}
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static void deferred_probe_timeout_work_func(struct work_struct *work)
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{
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struct device_private *private, *p;
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deferred_probe_timeout = 0;
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driver_deferred_probe_trigger();
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flush_work(&deferred_probe_work);
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list_for_each_entry_safe(private, p, &deferred_probe_pending_list, deferred_probe)
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dev_info(private->device, "deferred probe pending");
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}
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static DECLARE_DELAYED_WORK(deferred_probe_timeout_work, deferred_probe_timeout_work_func);
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/**
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* deferred_probe_initcall() - Enable probing of deferred devices
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*
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@ -233,15 +274,36 @@ void device_unblock_probing(void)
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*/
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static int deferred_probe_initcall(void)
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{
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deferred_devices = debugfs_create_file("devices_deferred", 0444, NULL,
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NULL, &deferred_devs_fops);
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|
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driver_deferred_probe_enable = true;
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driver_deferred_probe_trigger();
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/* Sort as many dependencies as possible before exiting initcalls */
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flush_work(&deferred_probe_work);
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initcalls_done = true;
|
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|
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/*
|
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* Trigger deferred probe again, this time we won't defer anything
|
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* that is optional
|
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*/
|
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driver_deferred_probe_trigger();
|
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flush_work(&deferred_probe_work);
|
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|
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if (deferred_probe_timeout > 0) {
|
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schedule_delayed_work(&deferred_probe_timeout_work,
|
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deferred_probe_timeout * HZ);
|
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}
|
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return 0;
|
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}
|
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late_initcall(deferred_probe_initcall);
|
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|
||||
static void __exit deferred_probe_exit(void)
|
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{
|
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debugfs_remove_recursive(deferred_devices);
|
||||
}
|
||||
__exitcall(deferred_probe_exit);
|
||||
|
||||
/**
|
||||
* device_is_bound() - Check if device is bound to a driver
|
||||
* @dev: device to check
|
||||
@ -519,6 +581,23 @@ done:
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* For initcall_debug, show the driver probe time.
|
||||
*/
|
||||
static int really_probe_debug(struct device *dev, struct device_driver *drv)
|
||||
{
|
||||
ktime_t calltime, delta, rettime;
|
||||
int ret;
|
||||
|
||||
calltime = ktime_get();
|
||||
ret = really_probe(dev, drv);
|
||||
rettime = ktime_get();
|
||||
delta = ktime_sub(rettime, calltime);
|
||||
printk(KERN_DEBUG "probe of %s returned %d after %lld usecs\n",
|
||||
dev_name(dev), ret, (s64) ktime_to_us(delta));
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* driver_probe_done
|
||||
* Determine if the probe sequence is finished or not.
|
||||
@ -577,7 +656,10 @@ int driver_probe_device(struct device_driver *drv, struct device *dev)
|
||||
pm_runtime_get_sync(dev->parent);
|
||||
|
||||
pm_runtime_barrier(dev);
|
||||
ret = really_probe(dev, drv);
|
||||
if (initcall_debug)
|
||||
ret = really_probe_debug(dev, drv);
|
||||
else
|
||||
ret = really_probe(dev, drv);
|
||||
pm_request_idle(dev);
|
||||
|
||||
if (dev->parent)
|
||||
|
||||
@ -30,9 +30,9 @@ void __init driver_init(void)
|
||||
/* These are also core pieces, but must come after the
|
||||
* core core pieces.
|
||||
*/
|
||||
of_core_init();
|
||||
platform_bus_init();
|
||||
cpu_dev_init();
|
||||
memory_dev_init();
|
||||
container_dev_init();
|
||||
of_core_init();
|
||||
}
|
||||
|
||||
@ -2253,7 +2253,7 @@ static int __genpd_dev_pm_attach(struct device *dev, struct device_node *np,
|
||||
mutex_unlock(&gpd_list_lock);
|
||||
dev_dbg(dev, "%s() failed to find PM domain: %ld\n",
|
||||
__func__, PTR_ERR(pd));
|
||||
return -EPROBE_DEFER;
|
||||
return driver_deferred_probe_check_state(dev);
|
||||
}
|
||||
|
||||
dev_dbg(dev, "adding to PM domain %s\n", pd->name);
|
||||
|
||||
@ -2915,8 +2915,6 @@ static struct platform_driver arm_smmu_driver = {
|
||||
};
|
||||
module_platform_driver(arm_smmu_driver);
|
||||
|
||||
IOMMU_OF_DECLARE(arm_smmuv3, "arm,smmu-v3");
|
||||
|
||||
MODULE_DESCRIPTION("IOMMU API for ARM architected SMMUv3 implementations");
|
||||
MODULE_AUTHOR("Will Deacon <will.deacon@arm.com>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
||||
@ -2211,13 +2211,6 @@ static struct platform_driver arm_smmu_driver = {
|
||||
};
|
||||
module_platform_driver(arm_smmu_driver);
|
||||
|
||||
IOMMU_OF_DECLARE(arm_smmuv1, "arm,smmu-v1");
|
||||
IOMMU_OF_DECLARE(arm_smmuv2, "arm,smmu-v2");
|
||||
IOMMU_OF_DECLARE(arm_mmu400, "arm,mmu-400");
|
||||
IOMMU_OF_DECLARE(arm_mmu401, "arm,mmu-401");
|
||||
IOMMU_OF_DECLARE(arm_mmu500, "arm,mmu-500");
|
||||
IOMMU_OF_DECLARE(cavium_smmuv2, "cavium,smmu-v2");
|
||||
|
||||
MODULE_DESCRIPTION("IOMMU API for ARM architected SMMU implementations");
|
||||
MODULE_AUTHOR("Will Deacon <will.deacon@arm.com>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
||||
@ -1390,5 +1390,3 @@ err_reg_driver:
|
||||
return ret;
|
||||
}
|
||||
core_initcall(exynos_iommu_init);
|
||||
|
||||
IOMMU_OF_DECLARE(exynos_iommu_of, "samsung,exynos-sysmmu");
|
||||
|
||||
@ -1108,9 +1108,6 @@ static void __exit ipmmu_exit(void)
|
||||
subsys_initcall(ipmmu_init);
|
||||
module_exit(ipmmu_exit);
|
||||
|
||||
IOMMU_OF_DECLARE(ipmmu_vmsa_iommu_of, "renesas,ipmmu-vmsa");
|
||||
IOMMU_OF_DECLARE(ipmmu_r8a7795_iommu_of, "renesas,ipmmu-r8a7795");
|
||||
|
||||
MODULE_DESCRIPTION("IOMMU API for Renesas VMSA-compatible IPMMU");
|
||||
MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
||||
@ -877,7 +877,5 @@ static void __exit msm_iommu_driver_exit(void)
|
||||
subsys_initcall(msm_iommu_driver_init);
|
||||
module_exit(msm_iommu_driver_exit);
|
||||
|
||||
IOMMU_OF_DECLARE(msm_iommu_of, "qcom,apq8064-iommu");
|
||||
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_AUTHOR("Stepan Moskovchenko <stepanm@codeaurora.org>");
|
||||
|
||||
@ -27,9 +27,6 @@
|
||||
|
||||
#define NO_IOMMU 1
|
||||
|
||||
static const struct of_device_id __iommu_of_table_sentinel
|
||||
__used __section(__iommu_of_table_end);
|
||||
|
||||
/**
|
||||
* of_get_dma_window - Parse *dma-window property and returns 0 if found.
|
||||
*
|
||||
@ -98,19 +95,6 @@ int of_get_dma_window(struct device_node *dn, const char *prefix, int index,
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(of_get_dma_window);
|
||||
|
||||
static bool of_iommu_driver_present(struct device_node *np)
|
||||
{
|
||||
/*
|
||||
* If the IOMMU still isn't ready by the time we reach init, assume
|
||||
* it never will be. We don't want to defer indefinitely, nor attempt
|
||||
* to dereference __iommu_of_table after it's been freed.
|
||||
*/
|
||||
if (system_state >= SYSTEM_RUNNING)
|
||||
return false;
|
||||
|
||||
return of_match_node(&__iommu_of_table, np);
|
||||
}
|
||||
|
||||
static int of_iommu_xlate(struct device *dev,
|
||||
struct of_phandle_args *iommu_spec)
|
||||
{
|
||||
@ -120,8 +104,7 @@ static int of_iommu_xlate(struct device *dev,
|
||||
|
||||
ops = iommu_ops_from_fwnode(fwnode);
|
||||
if ((ops && !ops->of_xlate) ||
|
||||
!of_device_is_available(iommu_spec->np) ||
|
||||
(!ops && !of_iommu_driver_present(iommu_spec->np)))
|
||||
!of_device_is_available(iommu_spec->np))
|
||||
return NO_IOMMU;
|
||||
|
||||
err = iommu_fwspec_init(dev, &iommu_spec->np->fwnode, ops);
|
||||
@ -133,7 +116,7 @@ static int of_iommu_xlate(struct device *dev,
|
||||
* a proper probe-ordering dependency mechanism in future.
|
||||
*/
|
||||
if (!ops)
|
||||
return -EPROBE_DEFER;
|
||||
return driver_deferred_probe_check_state(dev);
|
||||
|
||||
return ops->of_xlate(dev, iommu_spec);
|
||||
}
|
||||
|
||||
@ -945,7 +945,5 @@ static void __exit qcom_iommu_exit(void)
|
||||
module_init(qcom_iommu_init);
|
||||
module_exit(qcom_iommu_exit);
|
||||
|
||||
IOMMU_OF_DECLARE(qcom_iommu_dev, "qcom,msm-iommu-v1");
|
||||
|
||||
MODULE_DESCRIPTION("IOMMU API for QCOM IOMMU v1 implementations");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
|
||||
@ -1284,8 +1284,6 @@ static int __init rk_iommu_init(void)
|
||||
}
|
||||
subsys_initcall(rk_iommu_init);
|
||||
|
||||
IOMMU_OF_DECLARE(rk_iommu_of, "rockchip,iommu");
|
||||
|
||||
MODULE_DESCRIPTION("IOMMU API for Rockchip");
|
||||
MODULE_AUTHOR("Simon Xue <xxm@rock-chips.com> and Daniel Kurtz <djkurtz@chromium.org>");
|
||||
MODULE_ALIAS("platform:rockchip-iommu");
|
||||
|
||||
@ -111,17 +111,24 @@ static int dt_to_map_one_config(struct pinctrl *p,
|
||||
int ret;
|
||||
struct pinctrl_map *map;
|
||||
unsigned num_maps;
|
||||
bool allow_default = false;
|
||||
|
||||
/* Find the pin controller containing np_config */
|
||||
np_pctldev = of_node_get(np_config);
|
||||
for (;;) {
|
||||
if (!allow_default)
|
||||
allow_default = of_property_read_bool(np_pctldev,
|
||||
"pinctrl-use-default");
|
||||
|
||||
np_pctldev = of_get_next_parent(np_pctldev);
|
||||
if (!np_pctldev || of_node_is_root(np_pctldev)) {
|
||||
dev_info(p->dev, "could not find pctldev for node %pOF, deferring probe\n",
|
||||
np_config);
|
||||
of_node_put(np_pctldev);
|
||||
/* OK let's just assume this will appear later then */
|
||||
return -EPROBE_DEFER;
|
||||
ret = driver_deferred_probe_check_state(p->dev);
|
||||
/* keep deferring if modules are enabled unless we've timed out */
|
||||
if (IS_ENABLED(CONFIG_MODULES) && !allow_default && ret == -ENODEV)
|
||||
ret = -EPROBE_DEFER;
|
||||
|
||||
return ret;
|
||||
}
|
||||
/* If we're creating a hog we can use the passed pctldev */
|
||||
if (hog_pctldev && (np_pctldev == p->dev->of_node)) {
|
||||
|
||||
@ -97,7 +97,7 @@ static int kernfs_get_target_path(struct kernfs_node *parent,
|
||||
int slen = strlen(kn->name);
|
||||
|
||||
len -= slen;
|
||||
strncpy(s + len, kn->name, slen);
|
||||
memcpy(s + len, kn->name, slen);
|
||||
if (len)
|
||||
s[--len] = '/';
|
||||
|
||||
|
||||
@ -124,13 +124,22 @@ static int internal_create_group(struct kobject *kobj, int update,
|
||||
}
|
||||
kobject_get_ownership(kobj, &uid, &gid);
|
||||
if (grp->name) {
|
||||
kn = kernfs_create_dir_ns(kobj->sd, grp->name,
|
||||
S_IRWXU | S_IRUGO | S_IXUGO,
|
||||
uid, gid, kobj, NULL);
|
||||
if (IS_ERR(kn)) {
|
||||
if (PTR_ERR(kn) == -EEXIST)
|
||||
sysfs_warn_dup(kobj->sd, grp->name);
|
||||
return PTR_ERR(kn);
|
||||
if (update) {
|
||||
kn = kernfs_find_and_get(kobj->sd, grp->name);
|
||||
if (!kn) {
|
||||
pr_warn("Can't update unknown attr grp name: %s/%s\n",
|
||||
kobj->name, grp->name);
|
||||
return -EINVAL;
|
||||
}
|
||||
} else {
|
||||
kn = kernfs_create_dir_ns(kobj->sd, grp->name,
|
||||
S_IRWXU | S_IRUGO | S_IXUGO,
|
||||
uid, gid, kobj, NULL);
|
||||
if (IS_ERR(kn)) {
|
||||
if (PTR_ERR(kn) == -EEXIST)
|
||||
sysfs_warn_dup(kobj->sd, grp->name);
|
||||
return PTR_ERR(kn);
|
||||
}
|
||||
}
|
||||
} else
|
||||
kn = kobj->sd;
|
||||
@ -141,6 +150,10 @@ static int internal_create_group(struct kobject *kobj, int update,
|
||||
kernfs_remove(kn);
|
||||
}
|
||||
kernfs_put(kn);
|
||||
|
||||
if (grp->name && update)
|
||||
kernfs_put(kn);
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
@ -205,7 +218,8 @@ EXPORT_SYMBOL_GPL(sysfs_create_groups);
|
||||
* of the attribute files being created already exist. Furthermore,
|
||||
* if the visibility of the files has changed through the is_visible()
|
||||
* callback, it will update the permissions and add or remove the
|
||||
* relevant files.
|
||||
* relevant files. Changing a group's name (subdirectory name under
|
||||
* kobj's directory in sysfs) is not allowed.
|
||||
*
|
||||
* The primary use for this function is to call it after making a change
|
||||
* that affects group visibility.
|
||||
|
||||
@ -218,7 +218,6 @@
|
||||
#define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer)
|
||||
#define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
|
||||
#define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk)
|
||||
#define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu)
|
||||
#define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
|
||||
#define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method)
|
||||
#define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
|
||||
@ -601,7 +600,6 @@
|
||||
CLK_OF_TABLES() \
|
||||
RESERVEDMEM_OF_TABLES() \
|
||||
TIMER_OF_TABLES() \
|
||||
IOMMU_OF_TABLES() \
|
||||
CPU_METHOD_OF_TABLES() \
|
||||
CPUIDLE_METHOD_OF_TABLES() \
|
||||
KERNEL_DTB() \
|
||||
|
||||
@ -339,6 +339,8 @@ struct device *driver_find_device(struct device_driver *drv,
|
||||
struct device *start, void *data,
|
||||
int (*match)(struct device *dev, void *data));
|
||||
|
||||
int driver_deferred_probe_check_state(struct device *dev);
|
||||
|
||||
/**
|
||||
* struct subsys_interface - interfaces to device functions
|
||||
* @name: name of the device function
|
||||
@ -1329,30 +1331,34 @@ struct device_link *device_link_add(struct device *consumer,
|
||||
void device_link_del(struct device_link *link);
|
||||
void device_link_remove(void *consumer, struct device *supplier);
|
||||
|
||||
#ifndef dev_fmt
|
||||
#define dev_fmt(fmt) fmt
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_PRINTK
|
||||
|
||||
extern __printf(3, 0)
|
||||
__printf(3, 0)
|
||||
int dev_vprintk_emit(int level, const struct device *dev,
|
||||
const char *fmt, va_list args);
|
||||
extern __printf(3, 4)
|
||||
__printf(3, 4)
|
||||
int dev_printk_emit(int level, const struct device *dev, const char *fmt, ...);
|
||||
|
||||
extern __printf(3, 4)
|
||||
__printf(3, 4)
|
||||
void dev_printk(const char *level, const struct device *dev,
|
||||
const char *fmt, ...);
|
||||
extern __printf(2, 3)
|
||||
void dev_emerg(const struct device *dev, const char *fmt, ...);
|
||||
extern __printf(2, 3)
|
||||
void dev_alert(const struct device *dev, const char *fmt, ...);
|
||||
extern __printf(2, 3)
|
||||
void dev_crit(const struct device *dev, const char *fmt, ...);
|
||||
extern __printf(2, 3)
|
||||
void dev_err(const struct device *dev, const char *fmt, ...);
|
||||
extern __printf(2, 3)
|
||||
void dev_warn(const struct device *dev, const char *fmt, ...);
|
||||
extern __printf(2, 3)
|
||||
void dev_notice(const struct device *dev, const char *fmt, ...);
|
||||
extern __printf(2, 3)
|
||||
__printf(2, 3)
|
||||
void _dev_emerg(const struct device *dev, const char *fmt, ...);
|
||||
__printf(2, 3)
|
||||
void _dev_alert(const struct device *dev, const char *fmt, ...);
|
||||
__printf(2, 3)
|
||||
void _dev_crit(const struct device *dev, const char *fmt, ...);
|
||||
__printf(2, 3)
|
||||
void _dev_err(const struct device *dev, const char *fmt, ...);
|
||||
__printf(2, 3)
|
||||
void _dev_warn(const struct device *dev, const char *fmt, ...);
|
||||
__printf(2, 3)
|
||||
void _dev_notice(const struct device *dev, const char *fmt, ...);
|
||||
__printf(2, 3)
|
||||
void _dev_info(const struct device *dev, const char *fmt, ...);
|
||||
|
||||
#else
|
||||
@ -1370,26 +1376,26 @@ static inline void __dev_printk(const char *level, const struct device *dev,
|
||||
{}
|
||||
static inline __printf(3, 4)
|
||||
void dev_printk(const char *level, const struct device *dev,
|
||||
const char *fmt, ...)
|
||||
const char *fmt, ...)
|
||||
{}
|
||||
|
||||
static inline __printf(2, 3)
|
||||
void dev_emerg(const struct device *dev, const char *fmt, ...)
|
||||
void _dev_emerg(const struct device *dev, const char *fmt, ...)
|
||||
{}
|
||||
static inline __printf(2, 3)
|
||||
void dev_crit(const struct device *dev, const char *fmt, ...)
|
||||
void _dev_crit(const struct device *dev, const char *fmt, ...)
|
||||
{}
|
||||
static inline __printf(2, 3)
|
||||
void dev_alert(const struct device *dev, const char *fmt, ...)
|
||||
void _dev_alert(const struct device *dev, const char *fmt, ...)
|
||||
{}
|
||||
static inline __printf(2, 3)
|
||||
void dev_err(const struct device *dev, const char *fmt, ...)
|
||||
void _dev_err(const struct device *dev, const char *fmt, ...)
|
||||
{}
|
||||
static inline __printf(2, 3)
|
||||
void dev_warn(const struct device *dev, const char *fmt, ...)
|
||||
void _dev_warn(const struct device *dev, const char *fmt, ...)
|
||||
{}
|
||||
static inline __printf(2, 3)
|
||||
void dev_notice(const struct device *dev, const char *fmt, ...)
|
||||
void _dev_notice(const struct device *dev, const char *fmt, ...)
|
||||
{}
|
||||
static inline __printf(2, 3)
|
||||
void _dev_info(const struct device *dev, const char *fmt, ...)
|
||||
@ -1398,27 +1404,36 @@ void _dev_info(const struct device *dev, const char *fmt, ...)
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Stupid hackaround for existing uses of non-printk uses dev_info
|
||||
*
|
||||
* Note that the definition of dev_info below is actually _dev_info
|
||||
* and a macro is used to avoid redefining dev_info
|
||||
* #defines for all the dev_<level> macros to prefix with whatever
|
||||
* possible use of #define dev_fmt(fmt) ...
|
||||
*/
|
||||
|
||||
#define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg)
|
||||
#define dev_emerg(dev, fmt, ...) \
|
||||
_dev_emerg(dev, dev_fmt(fmt), ##__VA_ARGS__)
|
||||
#define dev_crit(dev, fmt, ...) \
|
||||
_dev_crit(dev, dev_fmt(fmt), ##__VA_ARGS__)
|
||||
#define dev_alert(dev, fmt, ...) \
|
||||
_dev_alert(dev, dev_fmt(fmt), ##__VA_ARGS__)
|
||||
#define dev_err(dev, fmt, ...) \
|
||||
_dev_err(dev, dev_fmt(fmt), ##__VA_ARGS__)
|
||||
#define dev_warn(dev, fmt, ...) \
|
||||
_dev_warn(dev, dev_fmt(fmt), ##__VA_ARGS__)
|
||||
#define dev_notice(dev, fmt, ...) \
|
||||
_dev_notice(dev, dev_fmt(fmt), ##__VA_ARGS__)
|
||||
#define dev_info(dev, fmt, ...) \
|
||||
_dev_info(dev, dev_fmt(fmt), ##__VA_ARGS__)
|
||||
|
||||
#if defined(CONFIG_DYNAMIC_DEBUG)
|
||||
#define dev_dbg(dev, format, ...) \
|
||||
do { \
|
||||
dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \
|
||||
} while (0)
|
||||
#define dev_dbg(dev, fmt, ...) \
|
||||
dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
|
||||
#elif defined(DEBUG)
|
||||
#define dev_dbg(dev, format, arg...) \
|
||||
dev_printk(KERN_DEBUG, dev, format, ##arg)
|
||||
#define dev_dbg(dev, fmt, ...) \
|
||||
dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__)
|
||||
#else
|
||||
#define dev_dbg(dev, format, arg...) \
|
||||
({ \
|
||||
if (0) \
|
||||
dev_printk(KERN_DEBUG, dev, format, ##arg); \
|
||||
#define dev_dbg(dev, fmt, ...) \
|
||||
({ \
|
||||
if (0) \
|
||||
dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
|
||||
})
|
||||
#endif
|
||||
|
||||
@ -1490,7 +1505,7 @@ do { \
|
||||
DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
|
||||
if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT) && \
|
||||
__ratelimit(&_rs)) \
|
||||
__dynamic_dev_dbg(&descriptor, dev, fmt, \
|
||||
__dynamic_dev_dbg(&descriptor, dev, dev_fmt(fmt), \
|
||||
##__VA_ARGS__); \
|
||||
} while (0)
|
||||
#elif defined(DEBUG)
|
||||
@ -1500,23 +1515,23 @@ do { \
|
||||
DEFAULT_RATELIMIT_INTERVAL, \
|
||||
DEFAULT_RATELIMIT_BURST); \
|
||||
if (__ratelimit(&_rs)) \
|
||||
dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); \
|
||||
dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
|
||||
} while (0)
|
||||
#else
|
||||
#define dev_dbg_ratelimited(dev, fmt, ...) \
|
||||
do { \
|
||||
if (0) \
|
||||
dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); \
|
||||
dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
|
||||
} while (0)
|
||||
#endif
|
||||
|
||||
#ifdef VERBOSE_DEBUG
|
||||
#define dev_vdbg dev_dbg
|
||||
#else
|
||||
#define dev_vdbg(dev, format, arg...) \
|
||||
({ \
|
||||
if (0) \
|
||||
dev_printk(KERN_DEBUG, dev, format, ##arg); \
|
||||
#define dev_vdbg(dev, fmt, ...) \
|
||||
({ \
|
||||
if (0) \
|
||||
dev_printk(KERN_DEBUG, dev, dev_fmt(fmt), ##__VA_ARGS__); \
|
||||
})
|
||||
#endif
|
||||
|
||||
|
||||
@ -119,6 +119,23 @@ extern void kobject_get_ownership(struct kobject *kobj,
|
||||
kuid_t *uid, kgid_t *gid);
|
||||
extern char *kobject_get_path(struct kobject *kobj, gfp_t flag);
|
||||
|
||||
/**
|
||||
* kobject_has_children - Returns whether a kobject has children.
|
||||
* @kobj: the object to test
|
||||
*
|
||||
* This will return whether a kobject has other kobjects as children.
|
||||
*
|
||||
* It does NOT account for the presence of attribute files, only sub
|
||||
* directories. It also assumes there is no concurrent addition or
|
||||
* removal of such children, and thus relies on external locking.
|
||||
*/
|
||||
static inline bool kobject_has_children(struct kobject *kobj)
|
||||
{
|
||||
WARN_ON_ONCE(kref_read(&kobj->kref) == 0);
|
||||
|
||||
return kobj->sd && kobj->sd->dir.subdirs;
|
||||
}
|
||||
|
||||
struct kobj_type {
|
||||
void (*release)(struct kobject *kobj);
|
||||
const struct sysfs_ops *sysfs_ops;
|
||||
|
||||
@ -32,8 +32,4 @@ static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
|
||||
|
||||
#endif /* CONFIG_OF_IOMMU */
|
||||
|
||||
extern struct of_device_id __iommu_of_table;
|
||||
|
||||
#define IOMMU_OF_DECLARE(name, compat) OF_DECLARE_1(iommu, name, compat, NULL)
|
||||
|
||||
#endif /* __OF_IOMMU_H */
|
||||
|
||||
@ -91,9 +91,9 @@ struct attribute_group {
|
||||
struct bin_attribute **bin_attrs;
|
||||
};
|
||||
|
||||
/**
|
||||
* Use these macros to make defining attributes easier. See include/linux/device.h
|
||||
* for examples..
|
||||
/*
|
||||
* Use these macros to make defining attributes easier.
|
||||
* See include/linux/device.h for examples..
|
||||
*/
|
||||
|
||||
#define SYSFS_PREALLOC 010000
|
||||
|
||||
@ -144,7 +144,7 @@ static void fill_kobj_path(struct kobject *kobj, char *path, int length)
|
||||
int cur = strlen(kobject_name(parent));
|
||||
/* back up enough to print this name with '/' */
|
||||
length -= cur;
|
||||
strncpy(path + length, kobject_name(parent), cur);
|
||||
memcpy(path + length, kobject_name(parent), cur);
|
||||
*(path + --length) = '/';
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user