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[PATCH] bcm43xx: opencoded locking

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As many people don't seem to like the locking "obfuscation"
in the bcm43xx driver, this patch removes it.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Buesch 2006-06-27 21:38:40 +02:00 committed by John W. Linville
parent b312d799b3
commit efa6a37021
7 changed files with 167 additions and 164 deletions
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64
drivers/net/wireless/bcm43xx/bcm43xx.h
View File

@ -649,6 +649,19 @@ enum {
#define bcm43xx_status(bcm) atomic_read(&(bcm)->init_status)
#define bcm43xx_set_status(bcm, stat) atomic_set(&(bcm)->init_status, (stat))
/* *** THEORY OF LOCKING ***
*
* We have two different locks in the bcm43xx driver.
* => bcm->mutex: General sleeping mutex. Protects struct bcm43xx_private
* and the device registers. This mutex does _not_ protect
* against concurrency from the IRQ handler.
* => bcm->irq_lock: IRQ spinlock. Protects against IRQ handler concurrency.
*
* Please note that, if you only take the irq_lock, you are not protected
* against concurrency from the periodic work handlers.
* Most times you want to take _both_ locks.
*/
struct bcm43xx_private {
struct ieee80211_device *ieee;
struct ieee80211softmac_device *softmac;
@ -659,7 +672,6 @@ struct bcm43xx_private {
void __iomem *mmio_addr;
/* Locking, see "theory of locking" text below. */
spinlock_t irq_lock;
struct mutex mutex;
@ -691,6 +703,7 @@ struct bcm43xx_private {
struct bcm43xx_sprominfo sprom;
#define BCM43xx_NR_LEDS 4
struct bcm43xx_led leds[BCM43xx_NR_LEDS];
spinlock_t leds_lock;
/* The currently active core. */
struct bcm43xx_coreinfo *current_core;
@ -763,55 +776,6 @@ struct bcm43xx_private {
};
/* *** THEORY OF LOCKING ***
*
* We have two different locks in the bcm43xx driver.
* => bcm->mutex: General sleeping mutex. Protects struct bcm43xx_private
* and the device registers.
* => bcm->irq_lock: IRQ spinlock. Protects against IRQ handler concurrency.
*
* We have three types of helper function pairs to utilize these locks.
* (Always use the helper functions.)
* 1) bcm43xx_{un}lock_noirq():
* Takes bcm->mutex. Does _not_ protect against IRQ concurrency,
* so it is almost always unsafe, if device IRQs are enabled.
* So only use this, if device IRQs are masked.
* Locking may sleep.
* You can sleep within the critical section.
* 2) bcm43xx_{un}lock_irqonly():
* Takes bcm->irq_lock. Does _not_ protect against
* bcm43xx_lock_noirq() critical sections.
* Does only protect against the IRQ handler path and other
* irqonly() critical sections.
* Locking does not sleep.
* You must not sleep within the critical section.
* 3) bcm43xx_{un}lock_irqsafe():
* This is the cummulative lock and takes both, mutex and irq_lock.
* Protects against noirq() and irqonly() critical sections (and
* the IRQ handler path).
* Locking may sleep.
* You must not sleep within the critical section.
*/
/* Lock type 1 */
#define bcm43xx_lock_noirq(bcm) mutex_lock(&(bcm)->mutex)
#define bcm43xx_unlock_noirq(bcm) mutex_unlock(&(bcm)->mutex)
/* Lock type 2 */
#define bcm43xx_lock_irqonly(bcm, flags) \
spin_lock_irqsave(&(bcm)->irq_lock, flags)
#define bcm43xx_unlock_irqonly(bcm, flags) \
spin_unlock_irqrestore(&(bcm)->irq_lock, flags)
/* Lock type 3 */
#define bcm43xx_lock_irqsafe(bcm, flags) do { \
bcm43xx_lock_noirq(bcm); \
bcm43xx_lock_irqonly(bcm, flags); \
} while (0)
#define bcm43xx_unlock_irqsafe(bcm, flags) do { \
bcm43xx_unlock_irqonly(bcm, flags); \
bcm43xx_unlock_noirq(bcm); \
} while (0)
static inline
struct bcm43xx_private * bcm43xx_priv(struct net_device *dev)
{

34
drivers/net/wireless/bcm43xx/bcm43xx_debugfs.c
View File

@ -77,7 +77,8 @@ static ssize_t devinfo_read_file(struct file *file, char __user *userbuf,
down(&big_buffer_sem);
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED) {
fappend("Board not initialized.\n");
goto out;
@ -121,7 +122,8 @@ static ssize_t devinfo_read_file(struct file *file, char __user *userbuf,
fappend("\n");
out:
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
up(&big_buffer_sem);
return res;
@ -159,7 +161,8 @@ static ssize_t spromdump_read_file(struct file *file, char __user *userbuf,
unsigned long flags;
down(&big_buffer_sem);
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED) {
fappend("Board not initialized.\n");
goto out;
@ -169,7 +172,8 @@ static ssize_t spromdump_read_file(struct file *file, char __user *userbuf,
fappend("boardflags: 0x%04x\n", bcm->sprom.boardflags);
out:
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
up(&big_buffer_sem);
return res;
@ -188,7 +192,8 @@ static ssize_t tsf_read_file(struct file *file, char __user *userbuf,
u64 tsf;
down(&big_buffer_sem);
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED) {
fappend("Board not initialized.\n");
goto out;
@ -199,7 +204,8 @@ static ssize_t tsf_read_file(struct file *file, char __user *userbuf,
(unsigned int)(tsf & 0xFFFFFFFFULL));
out:
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
up(&big_buffer_sem);
return res;
@ -221,7 +227,8 @@ static ssize_t tsf_write_file(struct file *file, const char __user *user_buf,
res = -EFAULT;
goto out_up;
}
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED) {
printk(KERN_INFO PFX "debugfs: Board not initialized.\n");
res = -EFAULT;
@ -237,7 +244,8 @@ static ssize_t tsf_write_file(struct file *file, const char __user *user_buf,
res = buf_size;
out_unlock:
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
out_up:
up(&big_buffer_sem);
return res;
@ -258,7 +266,8 @@ static ssize_t txstat_read_file(struct file *file, char __user *userbuf,
int i, cnt, j = 0;
down(&big_buffer_sem);
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
fappend("Last %d logged xmitstatus blobs (Latest first):\n\n",
BCM43xx_NR_LOGGED_XMITSTATUS);
@ -294,14 +303,15 @@ static ssize_t txstat_read_file(struct file *file, char __user *userbuf,
i = BCM43xx_NR_LOGGED_XMITSTATUS - 1;
}
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
bcm43xx_lock_irqsafe(bcm, flags);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (*ppos == pos) {
/* Done. Drop the copied data. */
e->xmitstatus_printing = 0;
}
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
up(&big_buffer_sem);
return res;
}

10
drivers/net/wireless/bcm43xx/bcm43xx_leds.c
View File

@ -51,12 +51,12 @@ static void bcm43xx_led_blink(unsigned long d)
struct bcm43xx_private *bcm = led->bcm;
unsigned long flags;
bcm43xx_lock_irqonly(bcm, flags);
spin_lock_irqsave(&bcm->leds_lock, flags);
if (led->blink_interval) {
bcm43xx_led_changestate(led);
mod_timer(&led->blink_timer, jiffies + led->blink_interval);
}
bcm43xx_unlock_irqonly(bcm, flags);
spin_unlock_irqrestore(&bcm->leds_lock, flags);
}
static void bcm43xx_led_blink_start(struct bcm43xx_led *led,
@ -177,7 +177,9 @@ void bcm43xx_leds_update(struct bcm43xx_private *bcm, int activity)
int i, turn_on;
unsigned long interval = 0;
u16 ledctl;
unsigned long flags;
spin_lock_irqsave(&bcm->leds_lock, flags);
ledctl = bcm43xx_read16(bcm, BCM43xx_MMIO_GPIO_CONTROL);
for (i = 0; i < BCM43xx_NR_LEDS; i++) {
led = &(bcm->leds[i]);
@ -266,6 +268,7 @@ void bcm43xx_leds_update(struct bcm43xx_private *bcm, int activity)
ledctl &= ~(1 << i);
}
bcm43xx_write16(bcm, BCM43xx_MMIO_GPIO_CONTROL, ledctl);
spin_unlock_irqrestore(&bcm->leds_lock, flags);
}
void bcm43xx_leds_switch_all(struct bcm43xx_private *bcm, int on)
@ -274,7 +277,9 @@ void bcm43xx_leds_switch_all(struct bcm43xx_private *bcm, int on)
u16 ledctl;
int i;
int bit_on;
unsigned long flags;
spin_lock_irqsave(&bcm->leds_lock, flags);
ledctl = bcm43xx_read16(bcm, BCM43xx_MMIO_GPIO_CONTROL);
for (i = 0; i < BCM43xx_NR_LEDS; i++) {
led = &(bcm->leds[i]);
@ -290,4 +295,5 @@ void bcm43xx_leds_switch_all(struct bcm43xx_private *bcm, int on)
ledctl &= ~(1 << i);
}
bcm43xx_write16(bcm, BCM43xx_MMIO_GPIO_CONTROL, ledctl);
spin_unlock_irqrestore(&bcm->leds_lock, flags);
}

64
drivers/net/wireless/bcm43xx/bcm43xx_main.c
View File

@ -514,13 +514,13 @@ static int bcm43xx_disable_interrupts_sync(struct bcm43xx_private *bcm, u32 *old
unsigned long flags;
u32 old;
bcm43xx_lock_irqonly(bcm, flags);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (unlikely(bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED)) {
bcm43xx_unlock_irqonly(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
return -EBUSY;
}
old = bcm43xx_interrupt_disable(bcm, BCM43xx_IRQ_ALL);
bcm43xx_unlock_irqonly(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
bcm43xx_synchronize_irq(bcm);
if (oldstate)
@ -1720,7 +1720,7 @@ static void bcm43xx_interrupt_tasklet(struct bcm43xx_private *bcm)
# define bcmirq_handled(irq) do { /* nothing */ } while (0)
#endif /* CONFIG_BCM43XX_DEBUG*/
bcm43xx_lock_irqonly(bcm, flags);
spin_lock_irqsave(&bcm->irq_lock, flags);
reason = bcm->irq_reason;
dma_reason[0] = bcm->dma_reason[0];
dma_reason[1] = bcm->dma_reason[1];
@ -1746,7 +1746,7 @@ static void bcm43xx_interrupt_tasklet(struct bcm43xx_private *bcm)
dma_reason[2], dma_reason[3]);
bcm43xx_controller_restart(bcm, "DMA error");
mmiowb();
bcm43xx_unlock_irqonly(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
return;
}
if (unlikely((dma_reason[0] & BCM43xx_DMAIRQ_NONFATALMASK) |
@ -1834,7 +1834,7 @@ static void bcm43xx_interrupt_tasklet(struct bcm43xx_private *bcm)
bcm43xx_leds_update(bcm, activity);
bcm43xx_interrupt_enable(bcm, bcm->irq_savedstate);
mmiowb();
bcm43xx_unlock_irqonly(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
}
static void pio_irq_workaround(struct bcm43xx_private *bcm,
@ -3182,25 +3182,26 @@ static void bcm43xx_periodic_work_handler(void *d)
/* Periodic work will take a long time, so we want it to
* be preemtible.
*/
bcm43xx_lock_irqonly(bcm, flags);
netif_stop_queue(bcm->net_dev);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (bcm43xx_using_pio(bcm))
bcm43xx_pio_freeze_txqueues(bcm);
savedirqs = bcm43xx_interrupt_disable(bcm, BCM43xx_IRQ_ALL);
bcm43xx_unlock_irqonly(bcm, flags);
bcm43xx_lock_noirq(bcm);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_lock(&bcm->mutex);
bcm43xx_synchronize_irq(bcm);
} else {
/* Periodic work should take short time, so we want low
* locking overhead.
*/
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
}
do_periodic_work(bcm);
if (badness > BADNESS_LIMIT) {
bcm43xx_lock_irqonly(bcm, flags);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (likely(bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED)) {
tasklet_enable(&bcm->isr_tasklet);
bcm43xx_interrupt_enable(bcm, savedirqs);
@ -3208,13 +3209,10 @@ static void bcm43xx_periodic_work_handler(void *d)
bcm43xx_pio_thaw_txqueues(bcm);
}
netif_wake_queue(bcm->net_dev);
mmiowb();
bcm43xx_unlock_irqonly(bcm, flags);
bcm43xx_unlock_noirq(bcm);
} else {
mmiowb();
bcm43xx_unlock_irqsafe(bcm, flags);
}
mmiowb();
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
}
static void bcm43xx_periodic_tasks_delete(struct bcm43xx_private *bcm)
@ -3276,7 +3274,7 @@ static void bcm43xx_free_board(struct bcm43xx_private *bcm)
{
int i, err;
bcm43xx_lock_noirq(bcm);
mutex_lock(&bcm->mutex);
bcm43xx_sysfs_unregister(bcm);
bcm43xx_periodic_tasks_delete(bcm);
@ -3297,7 +3295,7 @@ static void bcm43xx_free_board(struct bcm43xx_private *bcm)
bcm43xx_pctl_set_crystal(bcm, 0);
bcm43xx_set_status(bcm, BCM43xx_STAT_UNINIT);
bcm43xx_unlock_noirq(bcm);
mutex_unlock(&bcm->mutex);
}
static int bcm43xx_init_board(struct bcm43xx_private *bcm)
@ -3307,7 +3305,7 @@ static int bcm43xx_init_board(struct bcm43xx_private *bcm)
might_sleep();
bcm43xx_lock_noirq(bcm);
mutex_lock(&bcm->mutex);
bcm43xx_set_status(bcm, BCM43xx_STAT_INITIALIZING);
err = bcm43xx_pctl_set_crystal(bcm, 1);
@ -3389,7 +3387,7 @@ static int bcm43xx_init_board(struct bcm43xx_private *bcm)
assert(err == 0);
out:
bcm43xx_unlock_noirq(bcm);
mutex_unlock(&bcm->mutex);
return err;
@ -3647,7 +3645,8 @@ static void bcm43xx_ieee80211_set_chan(struct net_device *net_dev,
struct bcm43xx_radioinfo *radio;
unsigned long flags;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED) {
bcm43xx_mac_suspend(bcm);
bcm43xx_radio_selectchannel(bcm, channel, 0);
@ -3656,7 +3655,8 @@ static void bcm43xx_ieee80211_set_chan(struct net_device *net_dev,
radio = bcm43xx_current_radio(bcm);
radio->initial_channel = channel;
}
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
}
/* set_security() callback in struct ieee80211_device */
@ -3670,7 +3670,8 @@ static void bcm43xx_ieee80211_set_security(struct net_device *net_dev,
dprintk(KERN_INFO PFX "set security called");
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
for (keyidx = 0; keyidx<WEP_KEYS; keyidx++)
if (sec->flags & (1<<keyidx)) {
@ -3739,7 +3740,8 @@ static void bcm43xx_ieee80211_set_security(struct net_device *net_dev,
} else
bcm43xx_clear_keys(bcm);
}
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
}
/* hard_start_xmit() callback in struct ieee80211_device */
@ -3751,10 +3753,10 @@ static int bcm43xx_ieee80211_hard_start_xmit(struct ieee80211_txb *txb,
int err = -ENODEV;
unsigned long flags;
bcm43xx_lock_irqonly(bcm, flags);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (likely(bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED))
err = bcm43xx_tx(bcm, txb);
bcm43xx_unlock_irqonly(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
return err;
}
@ -3769,9 +3771,9 @@ static void bcm43xx_net_tx_timeout(struct net_device *net_dev)
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
unsigned long flags;
bcm43xx_lock_irqonly(bcm, flags);
spin_lock_irqsave(&bcm->irq_lock, flags);
bcm43xx_controller_restart(bcm, "TX timeout");
bcm43xx_unlock_irqonly(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
}
#ifdef CONFIG_NET_POLL_CONTROLLER
@ -3822,6 +3824,7 @@ static int bcm43xx_init_private(struct bcm43xx_private *bcm,
bcm->net_dev = net_dev;
bcm->bad_frames_preempt = modparam_bad_frames_preempt;
spin_lock_init(&bcm->irq_lock);
spin_lock_init(&bcm->leds_lock);
mutex_init(&bcm->mutex);
tasklet_init(&bcm->isr_tasklet,
(void (*)(unsigned long))bcm43xx_interrupt_tasklet,
@ -4002,16 +4005,13 @@ static int bcm43xx_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct net_device *net_dev = pci_get_drvdata(pdev);
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
unsigned long flags;
int try_to_shutdown = 0, err;
dprintk(KERN_INFO PFX "Suspending...\n");
bcm43xx_lock_irqsafe(bcm, flags);
bcm->was_initialized = (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED);
if (bcm->was_initialized)
try_to_shutdown = 1;
bcm43xx_unlock_irqsafe(bcm, flags);
netif_device_detach(net_dev);
if (try_to_shutdown) {

4
drivers/net/wireless/bcm43xx/bcm43xx_pio.c
View File

@ -262,7 +262,7 @@ static void tx_tasklet(unsigned long d)
int err;
u16 txctl;
bcm43xx_lock_irqonly(bcm, flags);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (queue->tx_frozen)
goto out_unlock;
@ -300,7 +300,7 @@ static void tx_tasklet(unsigned long d)
continue;
}
out_unlock:
bcm43xx_unlock_irqonly(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
}
static void setup_txqueues(struct bcm43xx_pioqueue *queue)

34
drivers/net/wireless/bcm43xx/bcm43xx_sysfs.c
View File

@ -120,12 +120,14 @@ static ssize_t bcm43xx_attr_sprom_show(struct device *dev,
GFP_KERNEL);
if (!sprom)
return -ENOMEM;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
err = bcm43xx_sprom_read(bcm, sprom);
if (!err)
err = sprom2hex(sprom, buf, PAGE_SIZE);
mmiowb();
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
kfree(sprom);
return err;
@ -150,10 +152,14 @@ static ssize_t bcm43xx_attr_sprom_store(struct device *dev,
err = hex2sprom(sprom, buf, count);
if (err)
goto out_kfree;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
spin_lock(&bcm->leds_lock);
err = bcm43xx_sprom_write(bcm, sprom);
mmiowb();
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock(&bcm->leds_lock);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
out_kfree:
kfree(sprom);
@ -176,7 +182,7 @@ static ssize_t bcm43xx_attr_interfmode_show(struct device *dev,
if (!capable(CAP_NET_ADMIN))
return -EPERM;
bcm43xx_lock_noirq(bcm);
mutex_lock(&bcm->mutex);
switch (bcm43xx_current_radio(bcm)->interfmode) {
case BCM43xx_RADIO_INTERFMODE_NONE:
@ -193,7 +199,7 @@ static ssize_t bcm43xx_attr_interfmode_show(struct device *dev,
}
err = 0;
bcm43xx_unlock_noirq(bcm);
mutex_unlock(&bcm->mutex);
return err ? err : count;
@ -229,7 +235,8 @@ static ssize_t bcm43xx_attr_interfmode_store(struct device *dev,
return -EINVAL;
}
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
err = bcm43xx_radio_set_interference_mitigation(bcm, mode);
if (err) {
@ -237,7 +244,8 @@ static ssize_t bcm43xx_attr_interfmode_store(struct device *dev,
"supported by device\n");
}
mmiowb();
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
return err ? err : count;
}
@ -257,7 +265,7 @@ static ssize_t bcm43xx_attr_preamble_show(struct device *dev,
if (!capable(CAP_NET_ADMIN))
return -EPERM;
bcm43xx_lock_noirq(bcm);
mutex_lock(&bcm->mutex);
if (bcm->short_preamble)
count = snprintf(buf, PAGE_SIZE, "1 (Short Preamble enabled)\n");
@ -265,7 +273,7 @@ static ssize_t bcm43xx_attr_preamble_show(struct device *dev,
count = snprintf(buf, PAGE_SIZE, "0 (Short Preamble disabled)\n");
err = 0;
bcm43xx_unlock_noirq(bcm);
mutex_unlock(&bcm->mutex);
return err ? err : count;
}
@ -285,12 +293,14 @@ static ssize_t bcm43xx_attr_preamble_store(struct device *dev,
value = get_boolean(buf, count);
if (value < 0)
return value;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
bcm->short_preamble = !!value;
err = 0;
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
return err ? err : count;
}

121
drivers/net/wireless/bcm43xx/bcm43xx_wx.c
View File

@ -56,12 +56,11 @@ static int bcm43xx_wx_get_name(struct net_device *net_dev,
{
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
int i;
unsigned long flags;
struct bcm43xx_phyinfo *phy;
char suffix[7] = { 0 };
int have_a = 0, have_b = 0, have_g = 0;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
for (i = 0; i < bcm->nr_80211_available; i++) {
phy = &(bcm->core_80211_ext[i].phy);
switch (phy->type) {
@ -77,7 +76,7 @@ static int bcm43xx_wx_get_name(struct net_device *net_dev,
assert(0);
}
}
bcm43xx_unlock_irqsafe(bcm, flags);
mutex_unlock(&bcm->mutex);
i = 0;
if (have_a) {
@ -111,7 +110,9 @@ static int bcm43xx_wx_set_channelfreq(struct net_device *net_dev,
int freq;
int err = -EINVAL;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
if ((data->freq.m >= 0) && (data->freq.m <= 1000)) {
channel = data->freq.m;
freq = bcm43xx_channel_to_freq(bcm, channel);
@ -131,7 +132,8 @@ static int bcm43xx_wx_set_channelfreq(struct net_device *net_dev,
err = 0;
}
out_unlock:
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
return err;
}
@ -143,11 +145,10 @@ static int bcm43xx_wx_get_channelfreq(struct net_device *net_dev,
{
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
struct bcm43xx_radioinfo *radio;
unsigned long flags;
int err = -ENODEV;
u16 channel;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
radio = bcm43xx_current_radio(bcm);
channel = radio->channel;
if (channel == 0xFF) {
@ -162,7 +163,7 @@ static int bcm43xx_wx_get_channelfreq(struct net_device *net_dev,
err = 0;
out_unlock:
bcm43xx_unlock_irqsafe(bcm, flags);
mutex_unlock(&bcm->mutex);
return err;
}
@ -180,13 +181,15 @@ static int bcm43xx_wx_set_mode(struct net_device *net_dev,
if (mode == IW_MODE_AUTO)
mode = BCM43xx_INITIAL_IWMODE;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED) {
if (bcm->ieee->iw_mode != mode)
bcm43xx_set_iwmode(bcm, mode);
} else
bcm->ieee->iw_mode = mode;
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
return 0;
}
@ -197,11 +200,10 @@ static int bcm43xx_wx_get_mode(struct net_device *net_dev,
char *extra)
{
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
unsigned long flags;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
data->mode = bcm->ieee->iw_mode;
bcm43xx_unlock_irqsafe(bcm, flags);
mutex_unlock(&bcm->mutex);
return 0;
}
@ -214,7 +216,6 @@ static int bcm43xx_wx_get_rangeparams(struct net_device *net_dev,
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
struct iw_range *range = (struct iw_range *)extra;
const struct ieee80211_geo *geo;
unsigned long flags;
int i, j;
struct bcm43xx_phyinfo *phy;
@ -254,7 +255,7 @@ static int bcm43xx_wx_get_rangeparams(struct net_device *net_dev,
IW_ENC_CAPA_CIPHER_TKIP |
IW_ENC_CAPA_CIPHER_CCMP;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
phy = bcm43xx_current_phy(bcm);
range->num_bitrates = 0;
@ -301,7 +302,7 @@ static int bcm43xx_wx_get_rangeparams(struct net_device *net_dev,
}
range->num_frequency = j;
bcm43xx_unlock_irqsafe(bcm, flags);
mutex_unlock(&bcm->mutex);
return 0;
}
@ -314,11 +315,11 @@ static int bcm43xx_wx_set_nick(struct net_device *net_dev,
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
size_t len;
bcm43xx_lock_noirq(bcm);
mutex_lock(&bcm->mutex);
len = min((size_t)data->data.length, (size_t)IW_ESSID_MAX_SIZE);
memcpy(bcm->nick, extra, len);
bcm->nick[len] = '\0';
bcm43xx_unlock_noirq(bcm);
mutex_unlock(&bcm->mutex);
return 0;
}
@ -331,12 +332,12 @@ static int bcm43xx_wx_get_nick(struct net_device *net_dev,
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
size_t len;
bcm43xx_lock_noirq(bcm);
mutex_lock(&bcm->mutex);
len = strlen(bcm->nick) + 1;
memcpy(extra, bcm->nick, len);
data->data.length = (__u16)len;
data->data.flags = 1;
bcm43xx_unlock_noirq(bcm);
mutex_unlock(&bcm->mutex);
return 0;
}
@ -350,7 +351,8 @@ static int bcm43xx_wx_set_rts(struct net_device *net_dev,
unsigned long flags;
int err = -EINVAL;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (data->rts.disabled) {
bcm->rts_threshold = BCM43xx_MAX_RTS_THRESHOLD;
err = 0;
@ -361,7 +363,8 @@ static int bcm43xx_wx_set_rts(struct net_device *net_dev,
err = 0;
}
}
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
return err;
}
@ -372,13 +375,12 @@ static int bcm43xx_wx_get_rts(struct net_device *net_dev,
char *extra)
{
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
unsigned long flags;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
data->rts.value = bcm->rts_threshold;
data->rts.fixed = 0;
data->rts.disabled = (bcm->rts_threshold == BCM43xx_MAX_RTS_THRESHOLD);
bcm43xx_unlock_irqsafe(bcm, flags);
mutex_unlock(&bcm->mutex);
return 0;
}
@ -392,7 +394,8 @@ static int bcm43xx_wx_set_frag(struct net_device *net_dev,
unsigned long flags;
int err = -EINVAL;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (data->frag.disabled) {
bcm->ieee->fts = MAX_FRAG_THRESHOLD;
err = 0;
@ -403,7 +406,8 @@ static int bcm43xx_wx_set_frag(struct net_device *net_dev,
err = 0;
}
}
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
return err;
}
@ -414,13 +418,12 @@ static int bcm43xx_wx_get_frag(struct net_device *net_dev,
char *extra)
{
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
unsigned long flags;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
data->frag.value = bcm->ieee->fts;
data->frag.fixed = 0;
data->frag.disabled = (bcm->ieee->fts == MAX_FRAG_THRESHOLD);
bcm43xx_unlock_irqsafe(bcm, flags);
mutex_unlock(&bcm->mutex);
return 0;
}
@ -442,7 +445,8 @@ static int bcm43xx_wx_set_xmitpower(struct net_device *net_dev,
return -EOPNOTSUPP;
}
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED)
goto out_unlock;
radio = bcm43xx_current_radio(bcm);
@ -466,7 +470,8 @@ static int bcm43xx_wx_set_xmitpower(struct net_device *net_dev,
err = 0;
out_unlock:
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
return err;
}
@ -478,10 +483,9 @@ static int bcm43xx_wx_get_xmitpower(struct net_device *net_dev,
{
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
struct bcm43xx_radioinfo *radio;
unsigned long flags;
int err = -ENODEV;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED)
goto out_unlock;
radio = bcm43xx_current_radio(bcm);
@ -493,7 +497,7 @@ static int bcm43xx_wx_get_xmitpower(struct net_device *net_dev,
err = 0;
out_unlock:
bcm43xx_unlock_irqsafe(bcm, flags);
mutex_unlock(&bcm->mutex);
return err;
}
@ -580,7 +584,8 @@ static int bcm43xx_wx_set_interfmode(struct net_device *net_dev,
return -EINVAL;
}
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED) {
err = bcm43xx_radio_set_interference_mitigation(bcm, mode);
if (err) {
@ -595,7 +600,8 @@ static int bcm43xx_wx_set_interfmode(struct net_device *net_dev,
} else
bcm43xx_current_radio(bcm)->interfmode = mode;
}
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
return err;
}
@ -606,12 +612,11 @@ static int bcm43xx_wx_get_interfmode(struct net_device *net_dev,
char *extra)
{
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
unsigned long flags;
int mode;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
mode = bcm43xx_current_radio(bcm)->interfmode;
bcm43xx_unlock_irqsafe(bcm, flags);
mutex_unlock(&bcm->mutex);
switch (mode) {
case BCM43xx_RADIO_INTERFMODE_NONE:
@ -641,9 +646,11 @@ static int bcm43xx_wx_set_shortpreamble(struct net_device *net_dev,
int on;
on = *((int *)extra);
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
bcm->short_preamble = !!on;
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
return 0;
}
@ -654,12 +661,11 @@ static int bcm43xx_wx_get_shortpreamble(struct net_device *net_dev,
char *extra)
{
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
unsigned long flags;
int on;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
on = bcm->short_preamble;
bcm43xx_unlock_irqsafe(bcm, flags);
mutex_unlock(&bcm->mutex);
if (on)
strncpy(extra, "1 (Short Preamble enabled)", MAX_WX_STRING);
@ -681,11 +687,13 @@ static int bcm43xx_wx_set_swencryption(struct net_device *net_dev,
on = *((int *)extra);
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
bcm->ieee->host_encrypt = !!on;
bcm->ieee->host_decrypt = !!on;
bcm->ieee->host_build_iv = !on;
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
return 0;
}
@ -696,12 +704,11 @@ static int bcm43xx_wx_get_swencryption(struct net_device *net_dev,
char *extra)
{
struct bcm43xx_private *bcm = bcm43xx_priv(net_dev);
unsigned long flags;
int on;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
on = bcm->ieee->host_encrypt;
bcm43xx_unlock_irqsafe(bcm, flags);
mutex_unlock(&bcm->mutex);
if (on)
strncpy(extra, "1 (SW encryption enabled) ", MAX_WX_STRING);
@ -764,11 +771,13 @@ static int bcm43xx_wx_sprom_read(struct net_device *net_dev,
if (!sprom)
goto out;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
err = -ENODEV;
if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED)
err = bcm43xx_sprom_read(bcm, sprom);
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
if (!err)
data->data.length = sprom2hex(sprom, extra);
kfree(sprom);
@ -809,11 +818,15 @@ static int bcm43xx_wx_sprom_write(struct net_device *net_dev,
if (err)
goto out_kfree;
bcm43xx_lock_irqsafe(bcm, flags);
mutex_lock(&bcm->mutex);
spin_lock_irqsave(&bcm->irq_lock, flags);
spin_lock(&bcm->leds_lock);
err = -ENODEV;
if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED)
err = bcm43xx_sprom_write(bcm, sprom);
bcm43xx_unlock_irqsafe(bcm, flags);
spin_unlock(&bcm->leds_lock);
spin_unlock_irqrestore(&bcm->irq_lock, flags);
mutex_unlock(&bcm->mutex);
out_kfree:
kfree(sprom);
out: