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    Subject[PATCH 3.19.y-ckt 082/210] drm/nouveau/kms: take mode_config mutex in connector hotplug path
    Date
    3.19.8-ckt14 -stable review patch.  If anyone has any objections, please let me know.

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

    From: Ben Skeggs <bskeggs@redhat.com>

    commit 0a882cadbc63fd2da3994af7115b4ada2fcbd638 upstream.

    fdo#93634

    Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
    Signed-off-by: Kamal Mostafa <kamal@canonical.com>
    ---
    drivers/gpu/drm/nouveau/nouveau_connector.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
    index c8ac948..a088c96 100644
    --- a/drivers/gpu/drm/nouveau/nouveau_connector.c
    +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
    @@ -952,10 +952,13 @@ nouveau_connector_hotplug(struct nvif_notify *notify)

    NV_DEBUG(drm, "%splugged %s\n", plugged ? "" : "un", name);

    + 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(connector->dev);
    }

    --
    1.9.1
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