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b43: Fix SDIO interrupt handler deadlock 

We need to release the SDIO host before locking the driver mutex.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Michael Buesch 2009-09-11 16:00:19 +02:00 committed by John W. Linville
parent ce6c4a1392
commit a8696c800b
2 changed files with 5 additions and 6 deletions
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6
drivers/net/wireless/b43/main.c
View File

@ -1914,20 +1914,14 @@ static irqreturn_t b43_interrupt_handler(int irq, void *dev_id)
static void b43_sdio_interrupt_handler(struct b43_wldev *dev)
{
struct b43_wl *wl = dev->wl;
struct sdio_func *func = dev->dev->bus->host_sdio;
irqreturn_t ret;
if (unlikely(b43_status(dev) < B43_STAT_STARTED))
return;
mutex_lock(&wl->mutex);
sdio_release_host(func);
ret = b43_do_interrupt(dev);
if (ret == IRQ_WAKE_THREAD)
b43_do_interrupt_thread(dev);
sdio_claim_host(func);
mutex_unlock(&wl->mutex);
}

5
drivers/net/wireless/b43/sdio.c
View File

@ -54,7 +54,12 @@ static void b43_sdio_interrupt_dispatcher(struct sdio_func *func)
struct b43_sdio *sdio = sdio_get_drvdata(func);
struct b43_wldev *dev = sdio->irq_handler_opaque;
if (unlikely(b43_status(dev) < B43_STAT_STARTED))
return;
sdio_release_host(func);
sdio->irq_handler(dev);
sdio_claim_host(func);
}
int b43_sdio_request_irq(struct b43_wldev *dev,