Messages in this thread Patch in this message | | | From | Karol Herbst <> | Subject | [PATCH] drm/nouveau/svm: fail NOUVEAU_SVM_INIT ioctl on unsupported devices | Date | Mon, 18 Jan 2021 18:13:46 +0100 |
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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> --- drivers/gpu/drm/nouveau/nouveau_svm.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.c b/drivers/gpu/drm/nouveau/nouveau_svm.c index 4f69e4c3dafd..1c3f890377d2 100644 --- a/drivers/gpu/drm/nouveau/nouveau_svm.c +++ b/drivers/gpu/drm/nouveau/nouveau_svm.c @@ -315,6 +315,10 @@ nouveau_svmm_init(struct drm_device *dev, void *data, 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; -- 2.29.2
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