From: Fabio Estevam <fabio.estevam@freescale.com>
Date: Thu, 5 Apr 2012 13:57:51 +0000 (-0300)
Subject: ASoC: imx-audmux: Check for NULL pointer
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=66bb2a7f835a28a9405f3f6571fbf34156e6bc1e;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

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>
---

diff --git a/sound/soc/imx/imx-audmux.c b/sound/soc/imx/imx-audmux.c
index 912a342ef776..0fe66c3dde12 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);