Commit 0e6176c6 authored by Ben Skeggs's avatar Ben Skeggs

drm/nouveau/disp/nv50-: prevent oops when no channel method map provided

The implementations for most channel types contains a map of methods to
priv registers in order to provide debugging info when a disp exception
has been raised.

This info is missing from the implementation of PIO channels as they're
rather simplistic already, however, if an exception is raised by one of
them, we'd end up triggering a NULL-pointer deref.  Not ideal...

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=206299Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
parent 0352029e
...@@ -74,6 +74,8 @@ nv50_disp_chan_mthd(struct nv50_disp_chan *chan, int debug) ...@@ -74,6 +74,8 @@ nv50_disp_chan_mthd(struct nv50_disp_chan *chan, int debug)
if (debug > subdev->debug) if (debug > subdev->debug)
return; return;
if (!mthd)
return;
for (i = 0; (list = mthd->data[i].mthd) != NULL; i++) { for (i = 0; (list = mthd->data[i].mthd) != NULL; i++) {
u32 base = chan->head * mthd->addr; u32 base = chan->head * mthd->addr;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment