[PATCH] drm/amdkfd: Don't drain ih1 for APU

[Yifan Zhang]

ih1 is not initialized for APUs. Don't drain it or NULL pointer
error will be triggered.

Fixes: 490fc21fe97c (drm/amdkfd: Change kfd/svm page fault drain handling)
Signed-off-by: Yifan Zhang <yifan1.zhang at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index b44dec90969f..1d08978955c7 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -2458,11 +2458,13 @@ svm_range_unmap_from_cpu(struct mm_struct *mm, struct svm_range *prange,
 		adev = pdd->dev->adev;
 
 		/* Check and drain ih1 ring if cam not available */
-		ih = &adev->irq.ih1;
-		checkpoint_wptr = amdgpu_ih_get_wptr(adev, ih);
-		if (ih->rptr != checkpoint_wptr) {
-			svms->checkpoint_ts[i] = amdgpu_ih_decode_iv_ts(adev, ih, checkpoint_wptr, -1);
-			continue;
+		if (!(adev->flags & AMD_IS_APU)) {
+			ih = &adev->irq.ih1;
+			checkpoint_wptr = amdgpu_ih_get_wptr(adev, ih);
+			if (ih->rptr != checkpoint_wptr) {
+				svms->checkpoint_ts[i] = amdgpu_ih_decode_iv_ts(adev, ih, checkpoint_wptr, -1);
+				continue;
+			}
 		}
 
 		/* check if dev->irq.ih_soft is not empty */
-- 
2.37.3