diff options
| author | Christian König <christian.koenig@amd.com> | 2014-07-23 09:47:58 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-31 12:52:57 -0700 |
| commit | 96b9da39c0946eb04481f4f2ca47651015a4de1b (patch) | |
| tree | a9e4fd16da7e85cc9f782dbf70676750a228d76f /drivers/gpu/drm/radeon/si.c | |
| parent | 80705fca953d4f2983d5197401de4ce7af7699d3 (diff) | |
drm/radeon: fix irq ring buffer overflow handling
commit e8c214d22e76dd0ead38f97f8d2dc09aac70d651 upstream.
We must mask out the overflow bit as well, otherwise
the wptr will never match the rptr again and the interrupt
handler will loop forever.
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/radeon/si.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/si.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c index cb7508dc94f3..ea93393374df 100644 --- a/drivers/gpu/drm/radeon/si.c +++ b/drivers/gpu/drm/radeon/si.c @@ -6098,6 +6098,7 @@ static inline u32 si_get_ih_wptr(struct radeon_device *rdev) tmp = RREG32(IH_RB_CNTL); tmp |= IH_WPTR_OVERFLOW_CLEAR; WREG32(IH_RB_CNTL, tmp); + wptr &= ~RB_OVERFLOW; } return (wptr & rdev->ih.ptr_mask); } |