b43: Fix some TX/RX locking issues

This fixes some TX/RX related locking issues.
With this patch applied, some of the PHY transmission errors are fixed.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43/b43.h b/drivers/net/wireless/b43/b43.h
index eff2a158a411..37783cdd301a 100644
--- a/drivers/net/wireless/b43/b43.h
+++ b/drivers/net/wireless/b43/b43.h
@@ -691,6 +691,10 @@ struct b43_wl {
 
         struct mutex mutex;
         spinlock_t irq_lock;
+        /* R/W lock for data transmission.
+         * Transmissions on 2+ queues can run concurrently, but somebody else
+         * might sync with TX by write_lock_irqsave()'ing. */
+        rwlock_t tx_lock;
         /* Lock for LEDs access. */
         spinlock_t leds_lock;
         /* Lock for SHM access. */