[PATCH] gpio_free might sleep, blackfin architecture

[Uwe Kleine-KÃnig]

According to the documentation gpio_free should only be called from task
context only.  To make this more explicit add a might sleep to all
implementations.

This patch changes the gpio_free implementations for the blackfin
architecture.

Signed-off-by: Uwe Kleine-KÃnig <ukleinek@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Cc: David Brownell <david-b@xxxxxxxxxxx>
Cc: Bryan Wu <cooloney@xxxxxxxxxx
Cc: uclinux-dist-devel@xxxxxxxxxxxxxxxxxxxx
Cc: Guennadi Liakhovetski <g.liakhovetski@xxxxxxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Cc: Kay Sievers <kay.sievers@xxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
---
 arch/blackfin/kernel/bfin_gpio.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index ecbd141..394006d 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -1151,6 +1151,8 @@ void gpio_free(unsigned gpio)
 	if (check_gpio(gpio) < 0)
 		return;
 
+	might_sleep();
+
 	local_irq_save(flags);
 
 	if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
-- 
1.5.6.5

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