drm/amdkfd: set "r = 0" explicitly before goto

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.Yang@amd.com>
Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
index 58b89b53ebe617c8dbab7dd95cac550cb82a8d5f..dd4715cb7d4208b8940fb4cf33f8aa859151e85e 100644 (file)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
@@ -2614,6 +2614,7 @@ 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;
        }
 
@@ -2623,6 +2624,7 @@ 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;
        }
 
@@ -2660,6 +2662,7 @@ retry_write_locked:
 
        if (svm_range_skip_recover(prange)) {
                amdgpu_gmc_filter_faults_remove(adev, addr, pasid);
+               r = 0;
                goto out_unlock_range;
        }
 
@@ -2668,6 +2671,7 @@ retry_write_locked:
        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;
        }