diff options
| author | Christian Koenig <christian.koenig@amd.com> | 2012-05-16 21:45:24 +0200 |
|---|---|---|
| committer | Christian König <deathsimple@vodafone.de> | 2012-06-21 09:38:48 +0200 |
| commit | c20dc3698dc7ecf053e2bf77299ae5982c0c2c45 (patch) | |
| tree | e150268483bee4137d9c22e3121171b23a53be76 /drivers/gpu/drm/radeon/radeon_device.c | |
| parent | 6823d74003abedd688a3f535aefe6ce0e06444fd (diff) | |
| download | linux-c20dc3698dc7ecf053e2bf77299ae5982c0c2c45.tar.bz2 | |
drm/radeon: fix & improve ih ring handling v3
The spinlock was actually there to protect the
rptr, but rptr was read outside of the locked area.
Also we don't really need a spinlock here, an
atomic should to quite fine since we only need to
prevent it from being reentrant.
v2: Keep the spinlock....
v3: Back to an atomic again after finding & fixing the real bug.
Signed-off-by: Christian Koenig <christian.koenig@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_device.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_device.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c index 7667184ab0bf..3c563d1f9671 100644 --- a/drivers/gpu/drm/radeon/radeon_device.c +++ b/drivers/gpu/drm/radeon/radeon_device.c @@ -731,8 +731,7 @@ int radeon_device_init(struct radeon_device *rdev, radeon_mutex_init(&rdev->cs_mutex); mutex_init(&rdev->ring_lock); mutex_init(&rdev->dc_hw_i2c_mutex); - if (rdev->family >= CHIP_R600) - spin_lock_init(&rdev->ih.lock); + atomic_set(&rdev->ih.lock, 0); mutex_init(&rdev->gem.mutex); mutex_init(&rdev->pm.mutex); init_rwsem(&rdev->pm.mclk_lock); |