On Sat, Oct 11, 2014 at 04:46:26PM +0300, Vladimir Zapolskiy wrote:

If PWM device is requested by means of legacy API pwm_request(), its
resources are not freed on module unbind, which may cause an oops on
access, e.g. by reading /sys/kernel/debug/pwm.

Reported-by: Dmitry Eremin-Solenikov <redacted>
Signed-off-by: Vladimir Zapolskiy <redacted>
---
 drivers/video/backlight/pwm_bl.c |    4 ++++
 1 file changed, 4 insertions(+)

Hopefully this can soon go away when all users of the legacy API have
been converted. Until then:

Acked-by: Thierry Reding <redacted>