From: Philip Yang <Philip.Yang@xxxxxxx>
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@xxxxxxxxxxxxxxx
Signed-off-by: Philip Yang <Philip.Yang@xxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ih.c
@@ -223,7 +223,7 @@ int amdgpu_ih_wait_on_checkpoint_process
*/
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_devi
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 */
