wireless: cw1200: acquire hwbus lock around cw1200_irq_handler() call.
authorSolomon Peachy <pizza@shaftnet.org>
Wed, 9 Oct 2013 16:15:11 +0000 (12:15 -0400)
committerJohn W. Linville <linville@tuxdriver.com>
Thu, 10 Oct 2013 18:05:42 +0000 (14:05 -0400)
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>
drivers/net/wireless/cw1200/cw1200_spi.c

index 899cad34ccd3aa1649029d90294fe21c30608d14..755a0c8edfe1235e73180b8b45d6143afa582547 100644 (file)
@@ -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;