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megaraid: simplify procfs code
Use remove_proc_subtree to remove the whole subtree on cleanup, and unwind the registration loop into individual calls. Switch to use proc_create_single. Also don't bother handling proc_create* failures - the driver works perfectly fine without the proc files, and the cleanup will handle missing files gracefully. Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig
parent
978547c5fb
commit
f7680bec04
@ -2731,53 +2731,6 @@ proc_show_rdrv_40(struct seq_file *m, void *v)
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return proc_show_rdrv(m, m->private, 30, 39);
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}
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/*
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* seq_file wrappers for procfile show routines.
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*/
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static int mega_proc_open(struct inode *inode, struct file *file)
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{
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adapter_t *adapter = proc_get_parent_data(inode);
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int (*show)(struct seq_file *, void *) = PDE_DATA(inode);
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return single_open(file, show, adapter);
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}
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static const struct file_operations mega_proc_fops = {
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.open = mega_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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/*
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* Table of proc files we need to create.
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*/
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struct mega_proc_file {
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const char *name;
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unsigned short ptr_offset;
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int (*show) (struct seq_file *m, void *v);
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};
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static const struct mega_proc_file mega_proc_files[] = {
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{ "config", offsetof(adapter_t, proc_read), proc_show_config },
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{ "stat", offsetof(adapter_t, proc_stat), proc_show_stat },
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{ "mailbox", offsetof(adapter_t, proc_mbox), proc_show_mbox },
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#if MEGA_HAVE_ENH_PROC
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{ "rebuild-rate", offsetof(adapter_t, proc_rr), proc_show_rebuild_rate },
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{ "battery-status", offsetof(adapter_t, proc_battery), proc_show_battery },
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{ "diskdrives-ch0", offsetof(adapter_t, proc_pdrvstat[0]), proc_show_pdrv_ch0 },
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{ "diskdrives-ch1", offsetof(adapter_t, proc_pdrvstat[1]), proc_show_pdrv_ch1 },
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{ "diskdrives-ch2", offsetof(adapter_t, proc_pdrvstat[2]), proc_show_pdrv_ch2 },
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{ "diskdrives-ch3", offsetof(adapter_t, proc_pdrvstat[3]), proc_show_pdrv_ch3 },
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{ "raiddrives-0-9", offsetof(adapter_t, proc_rdrvstat[0]), proc_show_rdrv_10 },
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{ "raiddrives-10-19", offsetof(adapter_t, proc_rdrvstat[1]), proc_show_rdrv_20 },
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{ "raiddrives-20-29", offsetof(adapter_t, proc_rdrvstat[2]), proc_show_rdrv_30 },
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{ "raiddrives-30-39", offsetof(adapter_t, proc_rdrvstat[3]), proc_show_rdrv_40 },
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#endif
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{ NULL }
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};
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/**
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* mega_create_proc_entry()
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* @index - index in soft state array
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@ -2788,31 +2741,45 @@ static const struct mega_proc_file mega_proc_files[] = {
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static void
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mega_create_proc_entry(int index, struct proc_dir_entry *parent)
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{
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const struct mega_proc_file *f;
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adapter_t *adapter = hba_soft_state[index];
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struct proc_dir_entry *dir, *de, **ppde;
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u8 string[16];
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adapter_t *adapter = hba_soft_state[index];
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struct proc_dir_entry *dir;
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u8 string[16];
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sprintf(string, "hba%d", adapter->host->host_no);
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dir = adapter->controller_proc_dir_entry =
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proc_mkdir_data(string, 0, parent, adapter);
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if(!dir) {
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dir = proc_mkdir_data(string, 0, parent, adapter);
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if (!dir) {
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dev_warn(&adapter->dev->dev, "proc_mkdir failed\n");
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return;
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}
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for (f = mega_proc_files; f->name; f++) {
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de = proc_create_data(f->name, S_IRUSR, dir, &mega_proc_fops,
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f->show);
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if (!de) {
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dev_warn(&adapter->dev->dev, "proc_create failed\n");
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return;
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}
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ppde = (void *)adapter + f->ptr_offset;
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*ppde = de;
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}
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proc_create_single_data("config", S_IRUSR, dir,
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proc_show_config, adapter);
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proc_create_single_data("stat", S_IRUSR, dir,
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proc_show_stat, adapter);
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proc_create_single_data("mailbox", S_IRUSR, dir,
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proc_show_mbox, adapter);
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#if MEGA_HAVE_ENH_PROC
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proc_create_single_data("rebuild-rate", S_IRUSR, dir,
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proc_show_rebuild_rate, adapter);
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proc_create_single_data("battery-status", S_IRUSR, dir,
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proc_show_battery, adapter);
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proc_create_single_data("diskdrives-ch0", S_IRUSR, dir,
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proc_show_pdrv_ch0, adapter);
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proc_create_single_data("diskdrives-ch1", S_IRUSR, dir,
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proc_show_pdrv_ch1, adapter);
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proc_create_single_data("diskdrives-ch2", S_IRUSR, dir,
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proc_show_pdrv_ch2, adapter);
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proc_create_single_data("diskdrives-ch3", S_IRUSR, dir,
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proc_show_pdrv_ch3, adapter);
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proc_create_single_data("raiddrives-0-9", S_IRUSR, dir,
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proc_show_rdrv_10, adapter);
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proc_create_single_data("raiddrives-10-19", S_IRUSR, dir,
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proc_show_rdrv_20, adapter);
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proc_create_single_data("raiddrives-20-29", S_IRUSR, dir,
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proc_show_rdrv_30, adapter);
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proc_create_single_data("raiddrives-30-39", S_IRUSR, dir,
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proc_show_rdrv_40, adapter);
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#endif
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}
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#else
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@ -4580,6 +4547,7 @@ megaraid_remove_one(struct pci_dev *pdev)
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{
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struct Scsi_Host *host = pci_get_drvdata(pdev);
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adapter_t *adapter = (adapter_t *)host->hostdata;
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char buf[12] = { 0 };
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scsi_remove_host(host);
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@ -4594,44 +4562,8 @@ megaraid_remove_one(struct pci_dev *pdev)
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mega_free_sgl(adapter);
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#ifdef CONFIG_PROC_FS
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if (adapter->controller_proc_dir_entry) {
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remove_proc_entry("stat", adapter->controller_proc_dir_entry);
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remove_proc_entry("config",
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adapter->controller_proc_dir_entry);
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remove_proc_entry("mailbox",
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adapter->controller_proc_dir_entry);
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#if MEGA_HAVE_ENH_PROC
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remove_proc_entry("rebuild-rate",
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adapter->controller_proc_dir_entry);
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remove_proc_entry("battery-status",
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adapter->controller_proc_dir_entry);
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remove_proc_entry("diskdrives-ch0",
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adapter->controller_proc_dir_entry);
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remove_proc_entry("diskdrives-ch1",
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adapter->controller_proc_dir_entry);
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remove_proc_entry("diskdrives-ch2",
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adapter->controller_proc_dir_entry);
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remove_proc_entry("diskdrives-ch3",
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adapter->controller_proc_dir_entry);
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remove_proc_entry("raiddrives-0-9",
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adapter->controller_proc_dir_entry);
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remove_proc_entry("raiddrives-10-19",
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adapter->controller_proc_dir_entry);
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remove_proc_entry("raiddrives-20-29",
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adapter->controller_proc_dir_entry);
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remove_proc_entry("raiddrives-30-39",
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adapter->controller_proc_dir_entry);
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#endif
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{
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char buf[12] = { 0 };
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sprintf(buf, "hba%d", adapter->host->host_no);
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remove_proc_entry(buf, mega_proc_dir_entry);
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}
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}
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#endif
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sprintf(buf, "hba%d", adapter->host->host_no);
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remove_proc_subtree(buf, mega_proc_dir_entry);
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pci_free_consistent(adapter->dev, MEGA_BUFFER_SIZE,
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adapter->mega_buffer, adapter->buf_dma_handle);
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@ -814,18 +814,6 @@ typedef struct {
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#ifdef CONFIG_PROC_FS
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struct proc_dir_entry *controller_proc_dir_entry;
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struct proc_dir_entry *proc_read;
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struct proc_dir_entry *proc_stat;
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struct proc_dir_entry *proc_mbox;
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#if MEGA_HAVE_ENH_PROC
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struct proc_dir_entry *proc_rr;
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struct proc_dir_entry *proc_battery;
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#define MAX_PROC_CHANNELS 4
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struct proc_dir_entry *proc_pdrvstat[MAX_PROC_CHANNELS];
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struct proc_dir_entry *proc_rdrvstat[MAX_PROC_CHANNELS];
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#endif
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#endif
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int has_64bit_addr; /* are we using 64-bit addressing */
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