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    Subject[PATCH 3.13.y-ckt 025/132] drm/radeon: take the mode_config mutex when dealing with hpds (v2)
    Date
    3.13.11-ckt24 -stable review patch.  If anyone has any objections, please let me know.

    ------------------

    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: Kamal Mostafa <kamal@canonical.com>
    ---
    drivers/gpu/drm/radeon/radeon_irq_kms.c | 2 ++
    1 file changed, 2 insertions(+)

    diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
    index 2c83be9..13d6ac4 100644
    --- 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(struct work_struct *work)
    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);
    }
    --
    1.9.1


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