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usb: sysfs: make locking interruptible

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232275a USB: fix substandard locking for the sysfs files
introduced needed locking into sysfs operations on USB devices
It, however, uses uninterruptible sleep and if the error
handling is on extreme cases of sleep lengths of 10s of seconds
are possible. Unless we are removing the device we should use
interruptible sleep.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Oliver Neukum 2016-01-21 15:18:47 +01:00 • committed by Greg Kroah-Hartman
parent 5363de7530
commit 7dd9cba5bb
3 changed files with 58 additions and 23 deletions
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5
include/linux/device.h
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@ -958,6 +958,11 @@ static inline void device_lock(struct device *dev)
mutex_lock(&dev->mutex);
}
static inline int device_lock_interruptible(struct device *dev)
{
return mutex_lock_interruptible(&dev->mutex);
}
static inline int device_trylock(struct device *dev)
{
return mutex_trylock(&dev->mutex);