From 899286fb6a7a20f5b5c5d0a9a22e4fc39b2d9e70 Mon Sep 17 00:00:00 2001 From: Zheng Yang Date: Tue, 26 May 2015 14:57:22 +0800 Subject: [PATCH] display-sys: function mode_string check input parameter. Signed-off-by: Zheng Yang --- drivers/video/rockchip/display-sys.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/video/rockchip/display-sys.c b/drivers/video/rockchip/display-sys.c index c2229187bc9d..a4b0d982ca28 100755 --- a/drivers/video/rockchip/display-sys.c +++ b/drivers/video/rockchip/display-sys.c @@ -77,6 +77,10 @@ static int mode_string(char *buf, unsigned int offset, { char v = 'p'; + if (!buf || !mode) { + pr_err("%s parameter error %x %x\n", __func__, buf, mode); + return 0; + } if (mode->xres == 0 && mode->yres == 0) return snprintf(&buf[offset], PAGE_SIZE - offset, "auto\n"); /* -- 2.34.1