Setting a non-settable selection target caused BUG() to be called. The check
for valid selections only takes the selection target into account, but does
not tell whether it may be set, or only get. Fix the issue by simply
returning an error to the user.

Signed-off-by: Sakari Ailus <sakari.ai...@iki.fi>
---
 drivers/media/i2c/smiapp/smiapp-core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/i2c/smiapp/smiapp-core.c 
b/drivers/media/i2c/smiapp/smiapp-core.c
index bcc5866..506bfde 100644
--- a/drivers/media/i2c/smiapp/smiapp-core.c
+++ b/drivers/media/i2c/smiapp/smiapp-core.c
@@ -2259,7 +2259,7 @@ static int smiapp_set_selection(struct v4l2_subdev 
*subdev,
                ret = smiapp_set_compose(subdev, fh, sel);
                break;
        default:
-               BUG();
+               ret = -EINVAL;
        }
 
        mutex_unlock(&sensor->mutex);
-- 
1.7.10.4

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