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[media] omap3isp: queue: Don't corrupt buf->npages when get_user_pages() fails

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get_user_pages() can return a negative error code when it fails. Set
buf->npages to 0 in that case, to prevent isp_video_buffer_cleanup()
from releasing invalid pages.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Laurent Pinchart 2011-04-07 13:30:14 -03:00 committed by Mauro Carvalho Chehab
parent c4f0b78ad5
commit 2578dfb7f7
1 changed files with 1 additions and 1 deletions
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2
drivers/media/video/omap3isp/ispqueue.c
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@ -339,7 +339,7 @@ static int isp_video_buffer_prepare_user(struct isp_video_buffer *buf)
up_read(&current->mm->mmap_sem);
if (ret != buf->npages) {
buf->npages = ret;
buf->npages = ret < 0 ? 0 : ret;
isp_video_buffer_cleanup(buf);
return -EFAULT;
}