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>
mariux64 · Apr 5, 2012 · 66bb2a7 · 66bb2a7
1 parent 00792ac
commit 66bb2a7
Showing 1 changed file with 3 additions and 0 deletions.
diff --git 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);