diff options
| -rw-r--r-- | shared-core/nv04_graph.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/shared-core/nv04_graph.c b/shared-core/nv04_graph.c index f1117cd6..2cf052cf 100644 --- a/shared-core/nv04_graph.c +++ b/shared-core/nv04_graph.c @@ -352,13 +352,38 @@ void nouveau_nv04_context_switch(struct drm_device *dev) struct nouveau_channel *next, *last; int chid; + if (!dev) { + DRM_DEBUG("Invalid drm_device\n"); + return; + } + dev_priv = dev->dev_private; + if (!dev_priv) { + DRM_DEBUG("Invalid drm_nouveau_private\n"); + return; + } + if (!dev_priv->fifos) { + DRM_DEBUG("Invalid drm_nouveau_private->fifos\n"); + return; + } + chid = NV_READ(NV03_PFIFO_CACHE1_PUSH1)&(nouveau_fifo_number(dev)-1); next = dev_priv->fifos[chid]; + if (!next) { + DRM_DEBUG("Invalid next channel\n"); + return; + } + chid = (NV_READ(NV04_PGRAPH_CTX_USER) >> 24) & (nouveau_fifo_number(dev)-1); last = dev_priv->fifos[chid]; - DRM_INFO("NV: PGRAPH context switch interrupt channel %x -> %x\n",last->id, next->id); + if (!last) { + DRM_DEBUG("WARNING: Invalid last channel, switch to %x\n", + next->id); + } else { + DRM_INFO("NV: PGRAPH context switch interrupt channel %x -> %x\n", + last->id, next->id); + } /* NV_WRITE(NV03_PFIFO_CACHES, 0x0); NV_WRITE(NV04_PFIFO_CACHE0_PULL0, 0x0); |