[PATCH 4/5] drm/amdkfd: restore pages race with process termination

[Philip Yang]

restore pages work can not find kfd process or mm struct if process is
destroyed before drain retry fault work schedule to run, this is not
failure, return 0 to avoid dump GPU vm fault kernel log.

Signed-off-by: Philip Yang <philip.y...@amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c 
b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index 8f77d5746b2c..2083a10b35c2 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -2596,7 +2596,7 @@ svm_range_restore_pages(struct amdgpu_device *adev, 
unsigned int pasid,
        p = kfd_lookup_process_by_pasid(pasid);
        if (!p) {
                pr_debug("kfd process not founded pasid 0x%x\n", pasid);
-               return -ESRCH;
+               return 0;
        }
        if (!p->xnack_enabled) {
                pr_debug("XNACK not enabled for pasid 0x%x\n", pasid);
@@ -2610,7 +2610,7 @@ svm_range_restore_pages(struct amdgpu_device *adev, 
unsigned int pasid,
        mm = get_task_mm(p->lead_thread);
        if (!mm) {
                pr_debug("svms 0x%p failed to get mm\n", svms);
-               r = -ESRCH;
+               r = 0;
                goto out;
        }
 
-- 
2.17.1