From: Karol Herbst <kherbst@xxxxxxxxxx>
commit dcd602cc5fe2803bf532d407cde24ba0b7808ff3 upstream.
Fixes a crash when trying to create a channel on e.g. Turing GPUs when
NOUVEAU_SVM_INIT was called before.
Fixes: eeaf06ac1a558 ("drm/nouveau/svm: initial support for shared virtual memory")
Signed-off-by: Karol Herbst <kherbst@xxxxxxxxxx>
Signed-off-by: Ben Skeggs <bskeggs@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/nouveau/nouveau_svm.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/gpu/drm/nouveau/nouveau_svm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_svm.c
@@ -306,6 +306,10 @@ nouveau_svmm_init(struct drm_device *dev
struct drm_nouveau_svm_init *args = data;
int ret;
+ /* We need to fail if svm is disabled */
+ if (!cli->drm->svm)
+ return -ENOSYS;
+
/* Allocate tracking for SVM-enabled VMM. */
if (!(svmm = kzalloc(sizeof(*svmm), GFP_KERNEL)))
return -ENOMEM;
