From 822cab6150d3002952407a8297ff5a0d32bb7b54 Mon Sep 17 00:00:00 2001 From: Ralph Campbell Date: Tue, 3 Mar 2020 16:13:37 -0800 Subject: 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 Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nouveau_svm.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers') 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; -- cgit