[PATCH] media: vpss: fix a potential NULL pointer dereference

[Kangjie Lu]

In case ioremap fails, the fix returns -ENOMEM to avoid NULL
pointer dereference.

Signed-off-by: Kangjie Lu <k...@umn.edu>
---
 drivers/media/platform/davinci/vpss.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/media/platform/davinci/vpss.c 
b/drivers/media/platform/davinci/vpss.c
index 19cf6853411e..f7beed2de9cb 100644
--- a/drivers/media/platform/davinci/vpss.c
+++ b/drivers/media/platform/davinci/vpss.c
@@ -518,6 +518,9 @@ static int __init vpss_init(void)
                return -EBUSY;
 
        oper_cfg.vpss_regs_base2 = ioremap(VPSS_CLK_CTRL, 4);
+       if (unlikely(!oper_cfg.vpss_regs_base2))
+               return -ENOMEM;
+
        writel(VPSS_CLK_CTRL_VENCCLKEN |
                     VPSS_CLK_CTRL_DACCLKEN, oper_cfg.vpss_regs_base2);
 
-- 
2.17.1