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authorFabio Estevam <fabio.estevam@freescale.com>2012-04-05 10:57:51 -0300
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-04-05 15:23:20 +0100
commit66bb2a7f835a28a9405f3f6571fbf34156e6bc1e (patch)
tree68e9ec3c450640c3d44b0ea42bb9e9e54eb801b2 /sound
parent00792ac4e0d88e82fc489a5e1c4d4435125a301c (diff)
downloadlinux-66bb2a7f835a28a9405f3f6571fbf34156e6bc1e.tar.gz
ASoC: imx-audmux: Check for NULL pointer
Check for NULL pointer before accessing it. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/imx/imx-audmux.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/soc/imx/imx-audmux.c b/sound/soc/imx/imx-audmux.c
index 912a342ef77..0fe66c3dde1 100644
--- a/sound/soc/imx/imx-audmux.c
+++ b/sound/soc/imx/imx-audmux.c
@@ -79,6 +79,9 @@ static ssize_t audmux_read_file(struct file *file, char __user *user_buf,
if (!buf)
return -ENOMEM;
+ if (!audmux_base)
+ return -ENOSYS;
+
if (audmux_clk)
clk_prepare_enable(audmux_clk);