From: Imre Deak imre.deak@intel.com
[ Upstream commit 2b245c97b1af5d8f04c359e0826cb5a5c81ef704 ]
After an out-of-memory error the reception state should be reset, so that the next attempt receiving a message doesn't fail (due to getting a start-of-message packet, while the reception state has already the start-of-message flag set).
Cc: Lyude Paul lyude@redhat.com Reviewed-by: Lyude Paul lyude@redhat.com Signed-off-by: Imre Deak imre.deak@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20241203160223.2926014-7-imre.... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/display/drm_dp_mst_topology.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c index 4d954e50964f0..b3c613f5e2089 100644 --- a/drivers/gpu/drm/display/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c @@ -3996,6 +3996,7 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr) { struct drm_dp_pending_up_req *up_req; struct drm_dp_mst_branch *mst_primary; + int ret = 0;
if (!drm_dp_get_one_sb_msg(mgr, true, NULL)) goto out_clear_reply; @@ -4004,8 +4005,10 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr) return 0;
up_req = kzalloc(sizeof(*up_req), GFP_KERNEL); - if (!up_req) - return -ENOMEM; + if (!up_req) { + ret = -ENOMEM; + goto out_clear_reply; + }
INIT_LIST_HEAD(&up_req->next);
@@ -4072,7 +4075,7 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr) drm_dp_mst_topology_put_mstb(mst_primary); out_clear_reply: memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); - return 0; + return ret; }
/**