Added some folks to Cc.
On Fri, 20 May 2016, Andrey Grodzovsky <Andrey.Grodzovsky@xxxxxxx> wrote:
> Not clearing mst manager's proposed vcpis table for destroyed
> connectors when the manager is stopped leaves it pointing to
> unrefernced memory, this causes pagefault when the manager is
> restarted when plugging back a branch.
You should list the relevant Cc's here too, and note where the bug was
introduced. A quick glance suggests
Fixes: 91a25e463130 ("drm/dp/mst: deallocate payload on port destruction")
but Mykola hopefully knows better.
BR,
Jani.
> Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@xxxxxxx>
> ---
> drivers/gpu/drm/drm_dp_mst_topology.c | 8 +++-----
> 1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
> index 9971c46..cd6014b 100644
> --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> @@ -2881,11 +2881,9 @@ static void drm_dp_destroy_connector_work(struct work_struct *work)
> drm_dp_port_teardown_pdt(port, port->pdt);
>
> if (!port->input && port->vcpi.vcpi > 0) {
> - if (mgr->mst_state) {
> - drm_dp_mst_reset_vcpi_slots(mgr, port);
> - drm_dp_update_payload_part1(mgr);
> - drm_dp_mst_put_payload_id(mgr, port->vcpi.vcpi);
> - }
> + drm_dp_mst_reset_vcpi_slots(mgr, port);
> + drm_dp_update_payload_part1(mgr);
> + drm_dp_mst_put_payload_id(mgr, port->vcpi.vcpi);
> }
>
> kref_put(&port->kref, drm_dp_free_mst_port);
--
Jani Nikula, Intel Open Source Technology Center
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