tree fd3bb5b05aa1cca4a6d3d9df94266f5b0a9d6616
parent 0f57bca922ed2180056aa1f948536236488b4a0d
author Ilija Hadzic <ilijahadzic@gmail.com> 1383447619 -0400
committer Alex Deucher <alexander.deucher@amd.com> 1383932016 -0500

drm/radeon/kms: unpin fb in atombios crtc disable

When drm_helper_disable_unused_functions calls disable
function of the CRTC, it also sets the crtc->fb pointer
to NULL. This can later (when the mode on that CRTC is setup
again from user space) cause ***_do_set_base functions to
"think" that there is no old buffer and skip the unpinning
code. Consequently, the buffer that has been NULL-ified in
drm_helper_disable_unused_functions will never be unpinned
causing a leak in VRAM.

This patch plugs the leak by unpinning the frame buffer
in crtc_disable function.

Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>