Patch "drm/radeon: take the mode_config mutex when dealing with hpds (v2)" has been added to the 4.1-stable tree

Patch "drm/radeon: take the mode_config mutex when dealing with hpds (v2)" has been added to the 4.1-stable tree

[gregkh]

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

    drm/radeon: take the mode_config mutex when dealing with hpds (v2)

to the 4.1-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-radeon-take-the-mode_config-mutex-when-dealing-with-hpds-v2.patch
and it can be found in the queue-4.1 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 39fa10f7e21574a70cecf1fed0f9b36535aa68a0 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 15 May 2015 11:48:52 -0400
Subject: drm/radeon: take the mode_config mutex when dealing with hpds (v2)

From: Alex Deucher <alexander.deucher@amd.com>

commit 39fa10f7e21574a70cecf1fed0f9b36535aa68a0 upstream.

Since we are messing with state in the worker.

v2: drop the changes in the mst worker

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/radeon/radeon_irq_kms.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -79,10 +79,12 @@ static void radeon_hotplug_work_func(str
 	struct drm_mode_config *mode_config = &dev->mode_config;
 	struct drm_connector *connector;
 
+	mutex_lock(&mode_config->mutex);
 	if (mode_config->num_connector) {
 		list_for_each_entry(connector, &mode_config->connector_list, head)
 			radeon_connector_hotplug(connector);
 	}
+	mutex_unlock(&mode_config->mutex);
 	/* Just fire off a uevent and let userspace tell us what to do */
 	drm_helper_hpd_irq_event(dev);
 }


Patches currently in stable-queue which might be from alexander.deucher@amd.com are

queue-4.1/drm-radeon-handle-irqs-only-based-on-irq-ring-not-irq-status-regs.patch
queue-4.1/drm-radeon-fix-hdp-flushing.patch
queue-4.1/drm-radeon-fix-user-ptr-race-condition.patch
queue-4.1/drm-radeon-add-a-dpm-quirk-for-sapphire-radeon-r9-270x-2gb-gddr5.patch
queue-4.1/drm-radeon-compute-ring-fix-hibernation-ci-gpu-family-v2.patch
queue-4.1/drm-radeon-only-check-the-sink-type-on-dp-connectors.patch
queue-4.1/drm-radeon-clean-up-reference-counting-and-pinning-of-the-cursor-bos.patch
queue-4.1/drm-radeon-unpin-cursor-bos-on-suspend-and-pin-them-again-on-resume-v2.patch
queue-4.1/drm-radeon-ci-silence-a-harmless-pcc-warning.patch
queue-4.1/drm-radeon-sdma-fix-hibernation-ci-gpu-family.patch
queue-4.1/drm-radeon-clean-up-radeon_audio_enable.patch
queue-4.1/revert-drm-radeon-dont-switch-vt-on-suspend.patch
queue-4.1/drm-radeon-take-the-mode_config-mutex-when-dealing-with-hpds-v2.patch
queue-4.1/drm-radeon-don-t-flush-the-gart-tlb-if-rdev-gart.ptr-null.patch