drm/self_refresh: Fix possible NULL deref in failure path

If state allocation fails, we still try to give back the reference on
it. Also initialize ret in case the crtc is not enabled and we hit the
eject button.

Fixes: 1452c25b0e60 ("drm: Add helpers to kick off self refresh mode in drivers")
Cc: Daniel Vetter <[email protected]>
Cc: Jose Souza <[email protected]>
Cc: Zain Wang <[email protected]>
Cc: Tomasz Figa <[email protected]>
Cc: Ville Syrjälä <[email protected]>
Cc: Sam Ravnborg <[email protected]>
Cc: Sean Paul <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: Sean Paul <[email protected]>
Cc: David Airlie <[email protected]>
Cc: [email protected]
Reported-by: Dan Carpenter <[email protected]>
Reviewed-by: Daniel Vetter <[email protected]>
Signed-off-by: Sean Paul <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

0 files changed, 0 insertions, 0 deletions