Also since I forgot, so patchwork picks this up: Reviewed-by: Lyude Paul <lyude@xxxxxxxxxx> On Tue, 2023-06-20 at 15:50 -0400, Lyude Paul wrote: > Eek - this might have been a situation where everyone involved assumed someone > else would push it, whoops. I'll make sure this is pushed upstream :). > > FWIW: You could definitely send an MR to the fedora kernel's gitlab to get > this included earlier. If you don't get to it before me I'll try to do that > today > > On Tue, 2023-06-20 at 07:18 -0400, Jeff Layton wrote: > > I've noticed that this patch is not included in linux-next currently. > > > > Can I get some confirmation that this is going to be included in v6.5? > > Currently, I've been having to rebuild Fedora kernels to avoid this > > panic, and I'd like to know there is a light at the end of that tunnel. > > > > Thanks, > > Jeff > > > > On Wed, 2023-04-19 at 16:54 -0400, Lyude Paul wrote: > > > Reviewed-by: Lyude Paul <lyude@xxxxxxxxxx> > > > > > > Thanks! > > > > > > On Wed, 2023-04-19 at 07:24 -0400, Jeff Layton wrote: > > > > I've been experiencing some intermittent crashes down in the display > > > > driver code. The symptoms are ususally a line like this in dmesg: > > > > > > > > amdgpu 0000:30:00.0: [drm] Failed to create MST payload for port 000000006d3a3885: -5 > > > > > > > > ...followed by an Oops due to a NULL pointer dereference. > > > > > > > > Switch to using mgr->dev instead of state->dev since "state" can be > > > > NULL in some cases. > > > > > > > > Link: https://bugzilla.redhat.com/show_bug.cgi?id=2184855 > > > > Suggested-by: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> > > > > Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx> > > > > --- > > > > drivers/gpu/drm/display/drm_dp_mst_topology.c | 2 +- > > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > > > I've been running this patch for a couple of days, but the problem > > > > hasn't occurred again as of yet. It seems sane though as long as we can > > > > assume that mgr->dev will be valid even when "state" is a NULL pointer. > > > > > > > > diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c > > > > index 38dab76ae69e..e2e21ce79510 100644 > > > > --- a/drivers/gpu/drm/display/drm_dp_mst_topology.c > > > > +++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c > > > > @@ -3404,7 +3404,7 @@ int drm_dp_add_payload_part2(struct drm_dp_mst_topology_mgr *mgr, > > > > > > > > /* Skip failed payloads */ > > > > if (payload->vc_start_slot == -1) { > > > > - drm_dbg_kms(state->dev, "Part 1 of payload creation for %s failed, skipping part 2\n", > > > > + drm_dbg_kms(mgr->dev, "Part 1 of payload creation for %s failed, skipping part 2\n", > > > > payload->port->connector->name); > > > > return -EIO; > > > > } > > > > > > -- Cheers, Lyude Paul (she/her) Software Engineer at Red Hat
