tree bf8547024a5befc7962ce129780e1b6184eb4f33
parent eed96e7595339858ce8e17f8c2ce60fae0c23a7a
author Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> 1475514202 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1504081308 +0200

drm: rcar-du: Fix crash in encoder failure error path

commit 05ee29e94acf0d4b3998c3f93374952de8f90176 upstream.

When an encoder fails to initialize the driver prints an error message
to the kernel log. The message contains the name of the encoder's DT
node, which is NULL for internal encoders. Use the of_node_full_name()
macro to avoid dereferencing a NULL pointer, print the output number to
add more context to the error, and make sure we still own a reference to
the encoder's DT node by delaying the of_node_put() call.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Thong Ho <thong.ho.px@rvc.renesas.com>
Signed-off-by: Nhan Nguyen <nhan.nguyen.yb@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>