gpio_free might sleep, generic part
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 is the generic part which changes gpiolib and the fallback implementation only. Signed-off-by: Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -792,6 +792,8 @@ void gpio_free(unsigned gpio)
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unsigned long flags;
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struct gpio_desc *desc;
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might_sleep();
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if (!gpio_is_valid(gpio)) {
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WARN_ON(extra_checks);
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return;
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@ -8,6 +8,7 @@
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#else
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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@ -32,6 +33,8 @@ static inline int gpio_request(unsigned gpio, const char *label)
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static inline void gpio_free(unsigned gpio)
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{
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might_sleep();
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/* GPIO can never have been requested */
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WARN_ON(1);
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}
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