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video: fbdev: stifb: handle NULL return value from ioremap_nocache

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Add missing error check for ioremap_nocache() failure
(prevents NULL pointer dereference on error).

Cc: "James E.J. Bottomley" <[email protected]>
Cc: Helge Deller <[email protected]>
Signed-off-by: Arvind Yadav <[email protected]>
[b.zolnierkie: minor fixes]
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>
This commit is contained in:
Arvind Yadav 2017-01-30 17:39:49 +01:00 • committed by Bartlomiej Zolnierkiewicz
commit 74a2b96e61
1 changed files with 4 additions and 0 deletions
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4
drivers/video/fbdev/stifb.c
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@ -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;