drm/i915: Fix possible NULL pointer dereferences in i9xx_update_wm()

Check return pointer from intel_crtc_for_plane() before dereferencing
it, as it can be NULL.

v2: Moved the NULL check into intel_crtc_active().

Cc: Jani Nikula <[email protected]>
Cc: Caz Yokoyama <[email protected]>
Cc: Radhakrishna Sripada <[email protected]>
Signed-off-by: Harish Chegondi <[email protected]>
Reviewed-by: Jani Nikula <[email protected]>
Signed-off-by: Matt Roper <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

0 files changed, 0 insertions, 0 deletions