radeon/pm: Guard access to rdev->pm.power_state array
authorMichel Dänzer <michel.daenzer@amd.com>
Wed, 8 Jan 2014 02:40:20 +0000 (11:40 +0900)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 13 Feb 2014 21:50:18 +0000 (13:50 -0800)
commitbcfd15c02eebeb514eea6abfd9c41cd98aa4db46
tree234f08629812c94ccb83d2716b56e8e95e0754d5
parent776c716b30696438465865697bba1ad8ba479e99
radeon/pm: Guard access to rdev->pm.power_state array

commit 370169516e736edad3b3c5aa49858058f8b55195 upstream.

It's never allocated on systems without an ATOMBIOS or COMBIOS ROM.

Should fix an oops I encountered while resetting the GPU after a lockup
on my PowerBook with an RV350.

Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/gpu/drm/radeon/radeon_pm.c