* [PATCH] drm/nouveau/svm: fail NOUVEAU_SVM_INIT ioctl on unsupported devices
@ 2021-01-18 17:16 Karol Herbst
0 siblings, 0 replies; only message in thread
From: Karol Herbst @ 2021-01-18 17:16 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW, Ben Skeggs
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-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
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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