Commit 822cab61 authored Mar 03, 2020 by Ralph Campbell Committed by Ben Skeggs Apr 07, 2020

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 <rcampbell@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

parent b92103b5

drivers/gpu/drm/nouveau/nouveau_svm.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -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;

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