ASoC: rsnd: fix usrcnt decrementing bug
authorAndrzej Hajda <a.hajda@samsung.com>
Thu, 24 Dec 2015 07:02:39 +0000 (08:02 +0100)
committerMark Brown <broonie@kernel.org>
Wed, 30 Dec 2015 17:13:20 +0000 (17:13 +0000)
commite5d9cfc6f5fe56caa44cefbc7ef4531c480d901d
tree31e8236e2d2920a7059eb440c3094d3380add4f5
parentb4c83b171557815a0b31a36805900cc9f21c9ee4
ASoC: rsnd: fix usrcnt decrementing bug

Field usrcnt is unsigned so it cannot be lesser than zero.
The patch fixes the check, moves it to the beginning of the function
and changes return value to -EIO in case of usercnt error.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
sound/soc/sh/rcar/ssi.c