drm/nv50-nvc0: work around an evo channel hang that some people see

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

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nv50_evo.c b/drivers/gpu/drm/nouveau/nv50_evo.c
index a2cfaa691e9b..c8e83c1a4de8 100644
--- a/drivers/gpu/drm/nouveau/nv50_evo.c
+++ b/drivers/gpu/drm/nouveau/nv50_evo.c
@@ -186,6 +186,7 @@ nv50_evo_channel_init(struct nouveau_channel *evo)
         nv_mask(dev, 0x610028, 0x00000000, 0x00010001 << id);
 
         evo->dma.max = (4096/4) - 2;
+        evo->dma.max &= ~7;
         evo->dma.put = 0;
         evo->dma.cur = evo->dma.put;
         evo->dma.free = evo->dma.max - evo->dma.cur;