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wireless: cw1200: acquire hwbus lock around cw1200_irq_handler() call. 

This fixes "lost interrupt" problems that occurred on SPI-based systems.
cw1200_irq_handler() expects the hwbus to be locked, but on the
SPI-path, that lock wasn't taken (unlike in the SDIO-path, where the
generic SDIO-code takes care of acquiring the lock).

Cc: stable@vger.kernel.org
Signed-off-by: David Mosberger <davidm@egauge.net>
Signed-off-by: Solomon Peachy <pizza@shaftnet.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Solomon Peachy 2013-10-09 12:15:11 -04:00 committed by John W. Linville
parent 9473ca6e92
commit 4978705d26
1 changed files with 2 additions and 0 deletions
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2
drivers/net/wireless/cw1200/cw1200_spi.c
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@ -237,7 +237,9 @@ static irqreturn_t cw1200_spi_irq_handler(int irq, void *dev_id)
struct hwbus_priv *self = dev_id; struct hwbus_priv *self = dev_id;
if (self->core) { if (self->core) {
cw1200_spi_lock(self);
cw1200_irq_handler(self->core); cw1200_irq_handler(self->core);
cw1200_spi_unlock(self);
return IRQ_HANDLED; return IRQ_HANDLED;
} else { } else {
return IRQ_NONE; return IRQ_NONE;