From 9e49f6c1339a7972e23a335c4c71a289b4c6f65b Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Tue, 9 Mar 2010 20:38:45 -0800 Subject: [PATCH] Input: bf54x-keys - fix system hang when pressing a key We need to use the nosync version of disable_irq so that we don't hang in the IRQ handler as we don't ACK the interrupt until later. This used to work regardless, but at some point, the IRQ behavior changed. Not sure when exactly. Signed-off-by: Mike Frysinger Signed-off-by: Dmitry Torokhov --- drivers/input/keyboard/bf54x-keys.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/input/keyboard/bf54x-keys.c b/drivers/input/keyboard/bf54x-keys.c index fe376a27fe57..593c052416b9 100644 --- a/drivers/input/keyboard/bf54x-keys.c +++ b/drivers/input/keyboard/bf54x-keys.c @@ -162,7 +162,7 @@ static irqreturn_t bfin_kpad_isr(int irq, void *dev_id) input_sync(input); if (bfin_kpad_get_keypressed(bf54x_kpad)) { - disable_irq(bf54x_kpad->irq); + disable_irq_nosync(bf54x_kpad->irq); bf54x_kpad->lastkey = key; mod_timer(&bf54x_kpad->timer, jiffies + bf54x_kpad->keyup_test_jiffies);