From: Ben Nizette Date: Thu, 16 Apr 2009 01:57:55 +0000 (-0700) Subject: Input: ads7846 - fix unsafe disable_irq X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3f3e7c6e139f704e2f48ea3b45ff7724a8d46456;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git Input: ads7846 - fix unsafe disable_irq The use of disable_irq inside the handler for the interrupt being disabled has always been dangerous. disable_irq should wait for that handler to complete before returning -> deadlock. For some reason this wasn't actually the case until 3aa551c9b was merged but since this time, the ads7846 driver has deadlocked the system on first interrupt. Convert the driver to use the handler-safe _nosync variant. Signed-off-by: Ben Nizette Signed-off-by: Dmitry Torokhov --- diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index cf7e69766b2b..8b6e30ac2919 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -754,7 +754,7 @@ static irqreturn_t ads7846_irq(int irq, void *handle) * that here. (The "generic irq" framework may help...) */ ts->irq_disabled = 1; - disable_irq(ts->spi->irq); + disable_irq_nosync(ts->spi->irq); ts->pending = 1; hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_DELAY), HRTIMER_MODE_REL);