[3.13.y-ckt stable] Patch "drm/nouveau/kms: take mode_config mutex in connector hotplug path" has been added to the 3.13.y-ckt tree

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    drm/nouveau/kms: take mode_config mutex in connector hotplug path

to the linux-3.13.y-queue branch of the 3.13.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.13.y-queue

This patch is scheduled to be released in version 3.13.11-ckt34.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

>From e85afbeddebac77fac20dd5ea25cb06cfecf1ce0 Mon Sep 17 00:00:00 2001
From: Ben Skeggs <bskeggs at redhat.com>
Date: Fri, 8 Jan 2016 08:56:51 +1000
Subject: drm/nouveau/kms: take mode_config mutex in connector hotplug path

commit 0a882cadbc63fd2da3994af7115b4ada2fcbd638 upstream.

fdo#93634

Signed-off-by: Ben Skeggs <bskeggs at redhat.com>
[ kamal: backport to 3.13-stable: context ]
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/gpu/drm/nouveau/nouveau_connector.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 1674882..40bd3ae 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -925,10 +925,12 @@ nouveau_connector_hotplug_work(struct work_struct *work)
 	NV_DEBUG(drm, "%splugged %s\n", plugged ? "" : "un",
 		 drm_get_connector_name(connector));

+	mutex_lock(&drm->dev->mode_config.mutex);
 	if (plugged)
 		drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
 	else
 		drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
+	mutex_unlock(&drm->dev->mode_config.mutex);

 	drm_helper_hpd_irq_event(dev);
 }
--
1.9.1