3.11.10.15 -stable review patch. If anyone has any objections, please let me
know.
------------------
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koe...@amd.com>
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.koe...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Reviewed-by: Michel Dänzer <michel.daen...@amd.com>
Signed-off-by: Luis Henriques <luis.henriq...@canonical.com>
---
drivers/gpu/drm/radeon/cik.c | 1 +
drivers/gpu/drm/radeon/evergreen.c | 1 +
drivers/gpu/drm/radeon/r600.c | 1 +
drivers/gpu/drm/radeon/si.c | 1 +
4 files changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index 85647ab99fb1..0aaaa11b7036 100644
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -5591,6 +5591,7 @@ static inline u32 cik_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);
}
diff --git a/drivers/gpu/drm/radeon/evergreen.c
b/drivers/gpu/drm/radeon/evergreen.c
index a34e20921711..415ab58594d9 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -4597,6 +4597,7 @@ static u32 evergreen_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);
}
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 33b35c9e82be..af588cf27293 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -4429,6 +4429,7 @@ static u32 r600_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);
}
diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
index 3479145e8f47..5a46e269e5d5 100644
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -6052,6 +6052,7 @@ 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);
}
--
1.9.1
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