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authorDave Airlie <airlied@redhat.com>2011-02-10 14:46:06 +1000
committerDave Airlie <airlied@redhat.com>2011-02-14 10:10:24 +1000
commit8fd1b84cc9d32e7e5c44e990a9c9e27504b232ed (patch)
treeffc92d031486bdee21d2d79121b6c4feae911b27 /drivers/gpu
parent0f234f5fdca1e31c7a6333c3633edc653cf3e598 (diff)
drm/radeon: fix race between GPU reset and TTM delayed delete thread.
My evergreen has been in a remote PC for week and reset has never once saved me from certain doom, I finally relocated to the box with a serial cable and noticed an oops when the GPU resets, and the TTM delayed delete thread tries to remove something from the GTT. This stops the delayed delete thread from executing across the GPU reset handler, and woot I can GPU reset now. Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/radeon/radeon_device.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 0d478932b1a9..4954e2d6ffa2 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -936,8 +936,11 @@ int radeon_resume_kms(struct drm_device *dev)
int radeon_gpu_reset(struct radeon_device *rdev)
{
int r;
+ int resched;
radeon_save_bios_scratch_regs(rdev);
+ /* block TTM */
+ resched = ttm_bo_lock_delayed_workqueue(&rdev->mman.bdev);
radeon_suspend(rdev);
r = radeon_asic_reset(rdev);
@@ -946,6 +949,7 @@ int radeon_gpu_reset(struct radeon_device *rdev)
radeon_resume(rdev);
radeon_restore_bios_scratch_regs(rdev);
drm_helper_resume_force_mode(rdev->ddev);
+ ttm_bo_unlock_delayed_workqueue(&rdev->mman.bdev, resched);
return 0;
}
/* bad news, how to tell it to userspace ? */