From e4bd3e591c8cc52ccf7a0b27f33aa7a5a19058d7 Mon Sep 17 00:00:00 2001
From: Ben Nizette <bn@niasdigital.com>
Date: Fri, 17 Apr 2009 20:35:57 -0700
Subject: [PATCH] Input: sa1111ps2 - use disable_irq_nosync() in irq handlers
disable_irq() waits for all running handlers to complete before
returning. As such, if it's used to disable an interrupt from
that interrupt's handler it will deadlock. This replaces the
dangerous instances with the _nosync() variant which doesn't have
this problem.
Signed-off-by: Ben Nizette <bn@niasdigital.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---
drivers/input/serio/sa1111ps2.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/input/serio/sa1111ps2.c b/drivers/input/serio/sa1111ps2.c
index 57953c0eb82f..f412c69478a8 100644
--- a/drivers/input/serio/sa1111ps2.c
+++ b/drivers/input/serio/sa1111ps2.c
@@ -77,7 +77,7 @@ static irqreturn_t ps2_txint(int irq, void *dev_id)
spin_lock(&ps2if->lock);
status = sa1111_readl(ps2if->base + SA1111_PS2STAT);
if (ps2if->head == ps2if->tail) {
- disable_irq(irq);
+ disable_irq_nosync(irq);
/* done */
} else if (status & PS2STAT_TXE) {
sa1111_writel(ps2if->buf[ps2if->tail], ps2if->base + SA1111_PS2DATA);
--
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