drm/nv50: prevent a possible ctxprog hang

[safe/jmp/linux-2.6] / drivers / gpu / drm / nouveau / nouveau_irq.c

diff --git a/drivers/gpu/drm/nouveau/nouveau_irq.c b/drivers/gpu/drm/nouveau/nouveau_irq.c
index 370c72c..919a619 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_irq.c
+++ b/drivers/gpu/drm/nouveau/nouveau_irq.c
@@ -635,6 +635,7 @@ nv50_pgraph_irq_handler(struct drm_device *dev)
 
                if ((nv_rd32(dev, 0x400500) & isb) != isb)
                        nv_wr32(dev, 0x400500, nv_rd32(dev, 0x400500) | isb);
+               nv_wr32(dev, 0x400824, nv_rd32(dev, 0x400824) & ~(1 << 31));
        }
 
        nv_wr32(dev, NV03_PMC_INTR_0, NV_PMC_INTR_0_PGRAPH_PENDING);