diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2010-09-03 10:25:02 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2010-09-24 16:23:54 +1000 |
| commit | 2941482ead0b02c9efd81fc3862be3ebfce607a5 (patch) | |
| tree | 97f89410377a8b5d7dc6f97df64f0fbb7e404593 | |
| parent | 185abeccabe5aed0ef79e8572c3916ea08034a45 (diff) | |
drm/nouveau: protect ramht_find() from oopsing if on channel without ramht
This doesn't actually happen now, but there's a test case for an earlier
kernel where a GPU error is signalled on one of nv50's fake channels, and
the ramht lookup by the IRQ handler triggered an oops.
This adds a check for RAMHT's existance on a channel before looking up
an object handle.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_ramht.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_ramht.c b/drivers/gpu/drm/nouveau/nouveau_ramht.c index de34b6bb059..f240ba24194 100644 --- a/drivers/gpu/drm/nouveau/nouveau_ramht.c +++ b/drivers/gpu/drm/nouveau/nouveau_ramht.c @@ -197,6 +197,9 @@ nouveau_ramht_find(struct nouveau_channel *chan, u32 handle) struct nouveau_gpuobj *gpuobj = NULL; unsigned long flags; + if (unlikely(!chan->ramht)) + return NULL; + spin_lock_irqsave(&ramht->lock, flags); list_for_each_entry(entry, &chan->ramht->entries, head) { if (entry->channel == chan && entry->handle == handle) { |