This is a note to let you know that I've just added the patch titled
drm: don't check modeset locks in panic handler
to the 3.4-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-don-t-check-modeset-locks-in-panic-handler.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a9b054e8ab06504c2afa0e307ee78d3778993a1d Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@xxxxxxxx>
Date: Thu, 2 May 2013 09:43:05 +0200
Subject: drm: don't check modeset locks in panic handler
From: Daniel Vetter <daniel.vetter@xxxxxxxx>
commit a9b054e8ab06504c2afa0e307ee78d3778993a1d upstream.
Since we know that locking is broken in that case and it's more
important to not flood the dmesg with random gunk.
References: http://lkml.kernel.org/r/20130502000206.GH15623@xxxxxxx
Cc: Dave Airlie <airlied@xxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Reported-and-tested-by: Borislav Petkov <bp@xxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_crtc.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -973,6 +973,10 @@ int drm_mode_group_init_legacy_group(str
if ((ret = drm_mode_group_init(dev, group)))
return ret;
+ /* Locking is currently fubar in the panic handler. */
+ if (oops_in_progress)
+ return;
+
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
group->id_list[group->num_crtcs++] = crtc->base.id;
Patches currently in stable-queue which might be from daniel.vetter@xxxxxxxx are
queue-3.4/drm-mm-fix-dump-table-bug.patch
queue-3.4/drm-don-t-check-modeset-locks-in-panic-handler.patch
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