tree 18a1bec350a97117f4540e96323eb0efad3f9b36
parent fb668c2fed628179c7aa409a0de39a2b96bed18c
author Dave Airlie <airlied@redhat.com> 1270006736 +1000
committer Dave Airlie <airlied@redhat.com> 1270090219 +1000

drm/radeon/kms: add sanity check to wptr.

If we resume in a bad way, we'll get 0xffffffff in wptr, and then
oops with no console. This just adds a sanity check so that we can
avoid the oops and hopefully get more details out of people's systems.

Signed-off-by: Dave Airlie <airlied@redhat.com>