This is a note to let you know that I've just added the patch titled
drm: use mgr->dev in drm_dbg_kms in drm_dp_add_payload_part2
to the 6.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-use-mgr-dev-in-drm_dbg_kms-in-drm_dp_add_payload_part2.patch
and it can be found in the queue-6.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 54d217406afe250d7a768783baaa79a035f21d38 Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlayton@xxxxxxxxxx>
Date: Wed, 19 Apr 2023 07:24:46 -0400
Subject: drm: use mgr->dev in drm_dbg_kms in drm_dp_add_payload_part2
From: Jeff Layton <jlayton@xxxxxxxxxx>
commit 54d217406afe250d7a768783baaa79a035f21d38 upstream.
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>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Reviewed-by: Lyude Paul <lyude@xxxxxxxxxx>
Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230419112447.18471-1-jlayton@xxxxxxxxxx
Cc: "Limonciello, Mario" <mario.limonciello@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/display/drm_dp_mst_topology.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- 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_
/* 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;
}
Patches currently in stable-queue which might be from jlayton@xxxxxxxxxx are
queue-6.3/drm-use-mgr-dev-in-drm_dbg_kms-in-drm_dp_add_payload_part2.patch
