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drm/amdgpu: IH process reset count when restart

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commit 4d62555f624582e60be416fbc4772cd3fcd12b1a upstream.

Otherwise when IH process restart, count is zero, the loop will
not exit to wake_up_all after processing AMDGPU_IH_MAX_NUM_IVS
interrupts.

Cc: stable@vger.kernel.org
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Philip Yang 2021-11-12 19:05:08 -05:00 committed by Greg Kroah-Hartman
parent 1c939a53b2
commit 2def7fdf5c
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c
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@ -223,7 +223,7 @@ int amdgpu_ih_wait_on_checkpoint_process(struct amdgpu_device *adev,
*/
int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih)
{
unsigned int count = AMDGPU_IH_MAX_NUM_IVS;
unsigned int count;
u32 wptr;
if (!ih->enabled || adev->shutdown)
@ -232,6 +232,7 @@ int amdgpu_ih_process(struct amdgpu_device *adev, struct amdgpu_ih_ring *ih)
wptr = amdgpu_ih_get_wptr(adev, ih);
restart_ih:
count = AMDGPU_IH_MAX_NUM_IVS;
DRM_DEBUG("%s: rptr %d, wptr %d\n", __func__, ih->rptr, wptr);
/* Order reading of wptr vs. reading of IH ring data */