A VRAM range smaller than a page becomes a zero-page TTM range and
causes drm_mm_init() to hit its zero-range BUG check. Reject it before
creating the VRAM manager.
Fixes: 37205891d84f ("drm/ttm: make ttm_range_man_init/takedown take type +
args")
Signed-off-by: Jiale Yao <[email protected]>
---
drivers/gpu/drm/nouveau/nouveau_ttm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c
b/drivers/gpu/drm/nouveau/nouveau_ttm.c
index cfc0868e2dd3..99c74c3b5976 100644
--- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
@@ -181,6 +181,9 @@ nouveau_ttm_init_host(struct nouveau_drm *drm, u8 kind)
static int
nouveau_ttm_init_vram(struct nouveau_drm *drm)
{
+ if (drm->gem.vram_available < PAGE_SIZE)
+ return -EINVAL;
+
if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
struct ttm_resource_manager *man = kzalloc_obj(*man);
--
2.34.1
