From: Hans Verkuil <hans.verk...@cisco.com>
Some ioctls need to copy back the result even if the ioctl returned
an error. However, don't do this for the error codes -ENOTTY, -EFAULT
and -ENOIOCTLCMD. It makes no sense in those cases.
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index 790473b45a21..2aa9b43daf60 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -966,6 +966,9 @@ static long do_video_ioctl(struct file *file, unsigned int
cmd, unsigned long ar
set_fs(old_fs);
}
+ if (err == -ENOTTY || err == -EFAULT || err == -ENOIOCTLCMD)
+ return err;
+
/* Special case: even after an error we need to put the
results back for these ioctls since the error_idx will
contain information on which control failed. */
--
2.15.1
