Patch "drm/atomic: Add missing drm_atomic_state_clear to atomic_remove_fb" has been added to the 4.12-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    drm/atomic: Add missing drm_atomic_state_clear to atomic_remove_fb

to the 4.12-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-atomic-add-missing-drm_atomic_state_clear-to-atomic_remove_fb.patch
and it can be found in the queue-4.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 4086d90cffb8f48400d51fbab575fe50458512e3 Mon Sep 17 00:00:00 2001
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Date: Thu, 29 Jun 2017 13:59:54 +0200
Subject: drm/atomic: Add missing drm_atomic_state_clear to atomic_remove_fb

From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

commit 4086d90cffb8f48400d51fbab575fe50458512e3 upstream.

All atomic state should be cleared when drm_modeset_backoff() is
called, because it drops all locks and the state becomes invalid.

The call to drm_atomic_state_clear was missing in atomic_remove_fb,
so add the missing call there.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170629115954.26029-1-maarten.lankhorst@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Fixes: db8f6403e88a ("drm: Convert drm_framebuffer_remove to atomic, v4.")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/drm_framebuffer.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/drm_framebuffer.c
+++ b/drivers/gpu/drm/drm_framebuffer.c
@@ -832,6 +832,7 @@ unlock:
 		drm_atomic_clean_old_fb(dev, plane_mask, ret);
 
 	if (ret == -EDEADLK) {
+		drm_atomic_state_clear(state);
 		drm_modeset_backoff(&ctx);
 		goto retry;
 	}


Patches currently in stable-queue which might be from maarten.lankhorst@linux.intel.com are

queue-4.12/drm-i915-make-dp-mst-connector-info-work.patch
queue-4.12/drm-atomic-add-missing-drm_atomic_state_clear-to-atomic_remove_fb.patch