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authorRalph Campbell <rcampbell@nvidia.com>2020-03-04 03:13:37 +0300
committerBen Skeggs <bskeggs@redhat.com>2020-04-07 07:37:49 +0300
commit822cab6150d3002952407a8297ff5a0d32bb7b54 (patch)
tree44a2cf84efff5405d84335be93bde96c24d8d0a8 /drivers/gpu
parentb92103b559c77abc5f8b7bec269230a219c880b7 (diff)
downloadlinux-822cab6150d3002952407a8297ff5a0d32bb7b54.tar.xz
drm/nouveau/svm: check for SVM initialized before migrating
When migrating system memory to GPU memory, check that SVM has been enabled. Even though most errors can be ignored since migration is a performance optimization, return an error because this is a violation of the API. Signed-off-by: Ralph Campbell <rcampbell@nvidia.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_svm.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.c b/drivers/gpu/drm/nouveau/nouveau_svm.c
index 169320409286..c567526b75b8 100644
--- a/drivers/gpu/drm/nouveau/nouveau_svm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_svm.c
@@ -171,6 +171,11 @@ nouveau_svmm_bind(struct drm_device *dev, void *data,
mm = get_task_mm(current);
down_read(&mm->mmap_sem);
+ if (!cli->svm.svmm) {
+ up_read(&mm->mmap_sem);
+ return -EINVAL;
+ }
+
for (addr = args->va_start, end = args->va_start + size; addr < end;) {
struct vm_area_struct *vma;
unsigned long next;