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authorLarry Finger <Larry.Finger@lwfinger.net>2006-08-21 09:43:44 -0500
committerJohn W. Linville <linville@tuxdriver.com>2006-09-11 19:34:00 -0400
commit7d4b0394bbf5e306ff9d5753163a07187131bfd8 (patch)
tree24696862ca6df267b7c4d30feb240174c99d4237 /drivers
parent34fa0e319c760189f1fc226acc5b3b387dc58099 (diff)
downloadlinux-linaro-android-7d4b0394bbf5e306ff9d5753163a07187131bfd8.tar.gz
[PATCH] bcm43xx-softmac: Init, shutdown and restart fixes
This fixes various bugs in the init and shutdown code that would lead to lockups and crashes. Signed-Off-By: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/wireless/bcm43xx/bcm43xx_main.c39
-rw-r--r--drivers/net/wireless/bcm43xx/bcm43xx_main.h3
-rw-r--r--drivers/net/wireless/bcm43xx/bcm43xx_sysfs.c3
3 files changed, 28 insertions, 17 deletions
diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_main.c b/drivers/net/wireless/bcm43xx/bcm43xx_main.c
index 966815be695..96a5fdec8aa 100644
--- a/drivers/net/wireless/bcm43xx/bcm43xx_main.c
+++ b/drivers/net/wireless/bcm43xx/bcm43xx_main.c
@@ -519,6 +519,7 @@ static int bcm43xx_disable_interrupts_sync(struct bcm43xx_private *bcm)
return -EBUSY;
}
bcm43xx_interrupt_disable(bcm, BCM43xx_IRQ_ALL);
+ bcm43xx_read32(bcm, BCM43xx_MMIO_GEN_IRQ_MASK); /* flush */
spin_unlock_irqrestore(&bcm->irq_lock, flags);
bcm43xx_synchronize_irq(bcm);
@@ -3150,6 +3151,7 @@ static void bcm43xx_periodic_work_handler(void *d)
/* Periodic work will take a long time, so we want it to
* be preemtible.
*/
+ mutex_lock(&bcm->mutex);
netif_stop_queue(bcm->net_dev);
synchronize_net();
spin_lock_irqsave(&bcm->irq_lock, flags);
@@ -3158,7 +3160,6 @@ static void bcm43xx_periodic_work_handler(void *d)
bcm43xx_pio_freeze_txqueues(bcm);
savedirqs = bcm43xx_interrupt_disable(bcm, BCM43xx_IRQ_ALL);
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
@@ -3172,13 +3173,11 @@ static void bcm43xx_periodic_work_handler(void *d)
if (badness > BADNESS_LIMIT) {
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);
- if (bcm43xx_using_pio(bcm))
- bcm43xx_pio_thaw_txqueues(bcm);
- bcm43xx_mac_enable(bcm);
- }
+ tasklet_enable(&bcm->isr_tasklet);
+ bcm43xx_interrupt_enable(bcm, savedirqs);
+ if (bcm43xx_using_pio(bcm))
+ bcm43xx_pio_thaw_txqueues(bcm);
+ bcm43xx_mac_enable(bcm);
netif_wake_queue(bcm->net_dev);
}
mmiowb();
@@ -3186,12 +3185,12 @@ static void bcm43xx_periodic_work_handler(void *d)
mutex_unlock(&bcm->mutex);
}
-static void bcm43xx_periodic_tasks_delete(struct bcm43xx_private *bcm)
+void bcm43xx_periodic_tasks_delete(struct bcm43xx_private *bcm)
{
cancel_rearming_delayed_work(&bcm->periodic_work);
}
-static void bcm43xx_periodic_tasks_setup(struct bcm43xx_private *bcm)
+void bcm43xx_periodic_tasks_setup(struct bcm43xx_private *bcm)
{
struct work_struct *work = &(bcm->periodic_work);
@@ -3539,11 +3538,10 @@ static int bcm43xx_init_board(struct bcm43xx_private *bcm)
err = bcm43xx_select_wireless_core(bcm, -1);
if (err)
goto err_crystal_off;
-
- bcm43xx_periodic_tasks_setup(bcm);
err = bcm43xx_sysfs_register(bcm);
if (err)
goto err_wlshutdown;
+ bcm43xx_periodic_tasks_setup(bcm);
err = bcm43xx_rng_init(bcm);
if (err)
goto err_sysfs_unreg;
@@ -3969,6 +3967,7 @@ static int bcm43xx_net_stop(struct net_device *net_dev)
err = bcm43xx_disable_interrupts_sync(bcm);
assert(!err);
bcm43xx_free_board(bcm);
+ flush_scheduled_work();
return 0;
}
@@ -4119,11 +4118,16 @@ static void bcm43xx_chip_reset(void *_bcm)
{
struct bcm43xx_private *bcm = _bcm;
struct bcm43xx_phyinfo *phy;
- int err;
+ int err = -ENODEV;
mutex_lock(&(bcm)->mutex);
- phy = bcm43xx_current_phy(bcm);
- err = bcm43xx_select_wireless_core(bcm, phy->type);
+ if (bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED) {
+ bcm43xx_periodic_tasks_delete(bcm);
+ phy = bcm43xx_current_phy(bcm);
+ err = bcm43xx_select_wireless_core(bcm, phy->type);
+ if (!err)
+ bcm43xx_periodic_tasks_setup(bcm);
+ }
mutex_unlock(&(bcm)->mutex);
printk(KERN_ERR PFX "Controller restart%s\n",
@@ -4132,11 +4136,12 @@ static void bcm43xx_chip_reset(void *_bcm)
/* Hard-reset the chip.
* This can be called from interrupt or process context.
+ * bcm->irq_lock must be locked.
*/
void bcm43xx_controller_restart(struct bcm43xx_private *bcm, const char *reason)
{
- assert(bcm43xx_status(bcm) == BCM43xx_STAT_INITIALIZED);
- bcm43xx_set_status(bcm, BCM43xx_STAT_RESTARTING);
+ if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED)
+ return;
printk(KERN_ERR PFX "Controller RESET (%s) ...\n", reason);
INIT_WORK(&bcm->restart_work, bcm43xx_chip_reset, bcm);
schedule_work(&bcm->restart_work);
diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_main.h b/drivers/net/wireless/bcm43xx/bcm43xx_main.h
index 505c86e2007..f76357178e4 100644
--- a/drivers/net/wireless/bcm43xx/bcm43xx_main.h
+++ b/drivers/net/wireless/bcm43xx/bcm43xx_main.h
@@ -141,6 +141,9 @@ void bcm43xx_wireless_core_reset(struct bcm43xx_private *bcm, int connect_phy);
void bcm43xx_mac_suspend(struct bcm43xx_private *bcm);
void bcm43xx_mac_enable(struct bcm43xx_private *bcm);
+void bcm43xx_periodic_tasks_delete(struct bcm43xx_private *bcm);
+void bcm43xx_periodic_tasks_setup(struct bcm43xx_private *bcm);
+
void bcm43xx_controller_restart(struct bcm43xx_private *bcm, const char *reason);
int bcm43xx_sprom_read(struct bcm43xx_private *bcm, u16 *sprom);
diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_sysfs.c b/drivers/net/wireless/bcm43xx/bcm43xx_sysfs.c
index ece335178f6..a16400d9ff4 100644
--- a/drivers/net/wireless/bcm43xx/bcm43xx_sysfs.c
+++ b/drivers/net/wireless/bcm43xx/bcm43xx_sysfs.c
@@ -333,8 +333,11 @@ static ssize_t bcm43xx_attr_phymode_store(struct device *dev,
goto out;
}
+ bcm43xx_periodic_tasks_delete(bcm);
mutex_lock(&(bcm)->mutex);
err = bcm43xx_select_wireless_core(bcm, phytype);
+ if (!err)
+ bcm43xx_periodic_tasks_setup(bcm);
mutex_unlock(&(bcm)->mutex);
if (err == -ESRCH)
err = -ENODEV;