[PATCH v2] drm/amdkfd: set "r = 0" explicitly before goto

[Philip Yang]

To silence the following Smatch static checker warning:

drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:2615
svm_range_restore_pages()
        warn: missing error code here? 'get_task_mm()' failed. 'r' = '0'

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

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c 
b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index 663489ae56d7..187e8ab66baa 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -2603,6 +2603,7 @@ svm_range_restore_pages(struct amdgpu_device *adev, 
unsigned int pasid,
 
        if (atomic_read(&svms->drain_pagefaults)) {
                pr_debug("draining retry fault, drop fault 0x%llx\n", addr);
+               r = 0;
                goto out;
        }
 
@@ -2612,6 +2613,7 @@ 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 = 0;
                goto out;
        }
 
@@ -2649,6 +2651,7 @@ svm_range_restore_pages(struct amdgpu_device *adev, 
unsigned int pasid,
 
        if (svm_range_skip_recover(prange)) {
                amdgpu_gmc_filter_faults_remove(adev, addr, pasid);
+               r = 0;
                goto out_unlock_range;
        }
 
@@ -2657,6 +2660,7 @@ svm_range_restore_pages(struct amdgpu_device *adev, 
unsigned int pasid,
        if (timestamp < AMDGPU_SVM_RANGE_RETRY_FAULT_PENDING) {
                pr_debug("svms 0x%p [0x%lx %lx] already restored\n",
                         svms, prange->start, prange->last);
+               r = 0;
                goto out_unlock_range;
        }
 
-- 
2.17.1