a7y18lte-ubports/android_kernel_samsung_universal7885
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pwm: Fix device reference leak

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commit 0e1614ac84f1719d87bed577963bb8140d0c9ce8 upstream.

Make sure to drop the reference to the parent device taken by
class_find_device() after "unexporting" any children when deregistering
a PWM chip.

Fixes: 0733424c9ba9 ("pwm: Unexport children before chip removal")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2016-11-01 11:46:39 +01:00 committed by Greg Kroah-Hartman
parent d7a2c259fc
commit 4fd108fa1a
1 changed files with 2 additions and 0 deletions
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drivers/pwm/sysfs.c
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@ -366,6 +366,8 @@ void pwmchip_sysfs_unexport_children(struct pwm_chip *chip)
if (test_bit(PWMF_EXPORTED, &pwm->flags))
pwm_unexport_child(parent, pwm);
}
put_device(parent);
}
static int __init pwm_sysfs_init(void)