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

Message ID 1381335311-20842-1-git-send-email-pizza@shaftnet.org (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Solomon Peachy Oct. 9, 2013, 4:15 p.m. UTC 
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>
---
Please consider this for 3.12-rc if it's not too late!

 drivers/net/wireless/cw1200/cw1200_spi.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/net/wireless/cw1200/cw1200_spi.c b/drivers/net/wireless/cw1200/cw1200_spi.c
index 899cad3..755a0c8 100644
--- a/drivers/net/wireless/cw1200/cw1200_spi.c
+++ b/drivers/net/wireless/cw1200/cw1200_spi.c
@@ -237,7 +237,9 @@  static irqreturn_t cw1200_spi_irq_handler(int irq, void *dev_id)
 	struct hwbus_priv *self = dev_id;
 
 	if (self->core) {
+		cw1200_spi_lock(self);
 		cw1200_irq_handler(self->core);
+		cw1200_spi_unlock(self);
 		return IRQ_HANDLED;
 	} else {
 		return IRQ_NONE;