drm/nouveau/ttm: avoid using nouveau_drm.ttm.type_vram prior to nv50

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Pre-NV50 chipsets don't currently use the MMU subsystem that later
chipsets use, and type_vram is negative here, leading to an OOB memory
access.

This was previously guarded by a chipset check, restore that.

Reported-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 5839172f09 ("drm/nouveau: explicitly specify caching to use")
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

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This commit is contained in:

Ben Skeggs 2020-11-14 13:50:44 +10:00

parent 630f512280

commit 6c27ffabeb

1 changed files with 1 additions and 2 deletions

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drivers/gpu/drm/nouveau/nouveau_bo.c

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