From: Karol Herbst kherbst@redhat.com
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@redhat.com Signed-off-by: Ben Skeggs bskeggs@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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;