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[media] vivid-vid-out: use memdup_user()

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Instead of allocating and coping from __user, do it using
one atomic call. That makes the code simpler.

Found by coccinelle.

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Mauro Carvalho Chehab 2014-09-03 14:57:30 -03:00
parent 93623c87a3
commit 0282969190
1 changed files with 3 additions and 7 deletions
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10
drivers/media/platform/vivid/vivid-vid-out.c
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@ -897,14 +897,10 @@ int vidioc_s_fmt_vid_out_overlay(struct file *file, void *priv,
return ret;
if (win->bitmap) {
new_bitmap = kzalloc(bitmap_size, GFP_KERNEL);
new_bitmap = memdup_user(win->bitmap, bitmap_size);
if (new_bitmap == NULL)
return -ENOMEM;
if (copy_from_user(new_bitmap, win->bitmap, bitmap_size)) {
kfree(new_bitmap);
return -EFAULT;
}
if (IS_ERR(new_bitmap))
return PTR_ERR(new_bitmap);
}
dev->overlay_out_top = win->w.top;