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Subject[PATCH 3.12 24/38] pwm: Fix device reference leak
Date
From: Johan Hovold <johan@kernel.org>

3.12-stable review patch. If anyone has any objections, please let me know.

===============

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: Jiri Slaby <jslaby@suse.cz>
---
drivers/pwm/sysfs.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/pwm/sysfs.c b/drivers/pwm/sysfs.c
index 809b5ab9074c..60d74a666c62 100644
--- a/drivers/pwm/sysfs.c
+++ b/drivers/pwm/sysfs.c
@@ -364,6 +364,8 @@ 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)
--
2.11.0
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