drm: rcar-du: Fix crash in encoder failure error path
authorLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Mon, 3 Oct 2016 17:03:22 +0000 (20:03 +0300)
committerLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Mon, 14 Nov 2016 01:35:14 +0000 (03:35 +0200)
commit05ee29e94acf0d4b3998c3f93374952de8f90176
tree9359a2c5dcc2d83f0062667b289bfe9d7d673357
parenteb508ce6f1df09e384cbad8bccdab4ad6081f45f
drm: rcar-du: Fix crash in encoder failure error path

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>
drivers/gpu/drm/rcar-du/rcar_du_kms.c