Here, If ioremap_nocache will fail. It will return NULL.
Kernel can run into a NULL-pointer dereference.
This error check will avoid NULL pointer dereference.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@xxxxxxxxx>
---
drivers/video/fbdev/stifb.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/video/fbdev/stifb.c b/drivers/video/fbdev/stifb.c
index accfef7..d5deab3 100644
--- a/drivers/video/fbdev/stifb.c
+++ b/drivers/video/fbdev/stifb.c
@@ -1294,6 +1294,10 @@ static int __init stifb_init_fb(struct sti_struct *sti, int bpp_pref)
strcpy(fix->id, "stifb");
info->fbops = &stifb_ops;
info->screen_base = ioremap_nocache(REGION_BASE(fb,1), fix->smem_len);
+ if (!info->screen_base) {
+ printk(KERN_ERR "stifb: Failed to Map memory\n");
+ goto out_err0;
+ }
info->screen_size = fix->smem_len;
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA;
info->pseudo_palette = &fb->pseudo_palette;
--
1.9.1
--
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