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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?1vt22y4MSHPKyAQNfYysX60Ck9I//fzCI6woCUoOWS/xFzvHGtlskBeC6dpk?= =?us-ascii?Q?KEHtPAEdLOvD8kl9tnXmxvNliwygICRsT7T3NCgKxpc8BzxhyUj8V/Hwqk+v?= =?us-ascii?Q?XzoHTT2emkmLtWmjuNbnGfUAOAuNnutRI6KWrwN5F2jcUXcEwb6Vdvf3evd/?= =?us-ascii?Q?I+Jhkz+UZnE5hX0tBaq7SVGGe2AqZFIjzRoPXniexI34ibzyTw9xLu1ADtWM?= =?us-ascii?Q?G3K2p97IvWQL9xXIlxCgCdiBTdnVDU13u2QVK0H2jAGPFHTaBMEJo9XrS3TG?= =?us-ascii?Q?/RGRNKdfjMnXcb9ZsnSUYh1LaIj0RztZA2OjReBk52n2yeppd72hqyh6L0iK?= =?us-ascii?Q?KGFxUzMMJCt5OC38mCmYp96bRlVv5TJ+HdwifsTgImkHxpqyStH6gSR62nh+?= =?us-ascii?Q?iyursGwYjJMaGrqbkMg0+QZRx1QykVI3TbHeB9GzETHAG6dRMW+WR56TjGrl?= =?us-ascii?Q?q8sbDyct7+vp9qWYpeFlMgA3VlQFUbGmLxsZkONDsAur3S7CmgWbIByRVqIw?= =?us-ascii?Q?bz/vOg3mvtAIGVNh7+qXh3/JRCRQgz7GIy3yuukkqT/t5IW6OfcloigLaqwS?= =?us-ascii?Q?Zt0Uf8D/JSpmyFtkXMMw+pGvl9xmliDmo5IVgboENJNzs9suawyOzRqbhPj4?= =?us-ascii?Q?F5M9pZBsvgDAUjOMJzGifxgXL+Y2Nby7N89GqATYerraY13pxhmyedlbhqU/?= =?us-ascii?Q?Nu7TTwVg0xGEtJY+yyOOVdM9cc9HWyUaW9Uo5GngAXvv+blDsB4uJ3i7EWfo?= =?us-ascii?Q?kEnUUIFkgohscbOxj9Wk9RxyS5tl2xaSOboWLfOJsrujNlE6RbJeK7lrHgy+?= =?us-ascii?Q?57LQXfvnPckiV4RFj44vM+eg1yjO21CFT7V/EfReRlsys3s89zkAYMVSQu3P?= =?us-ascii?Q?DbuZDr7LRmP/i3SauJQJyV10IDkvRw77uHd4HU8Yfh7AitFHWHdEBIk5qRx2?= =?us-ascii?Q?pmzqKRYoUTdtsJ5LKhMWdL7I5v7o7wiQUKQ/yZCKDiLYBQNtrheoKXgOHaDn?= =?us-ascii?Q?8Wv/etFJEoM5jNSJl63zIwGEcachMpmxFuIdN9hbmFXyoNAr8ZvvwyNQt6Vx?= =?us-ascii?Q?PZ8HG4JrrzFqCs0l6WMc0T5MJLZz9Pnrsuwytqsce1o2UxeAAP1op9+RVfK6?= =?us-ascii?Q?Jr1Xg2gakf79KmHeNXR2mHHtJn8QG72iq+qIgleDtvIwo83kkr3cZR3E3MyV?= =?us-ascii?Q?b0hge6aNljlkxBrxAm6eOJMHyfeuFMknud7Txgpfpq0tGVfOhz7yoRUc1Agp?= =?us-ascii?Q?FHeHVLxmj4Metzgv3hp8BrJWjGFzULQTSQ9tXUt5QaPZudiuQzyaEPSxonjg?= =?us-ascii?Q?eymZf8xIO9r80IXKSIsmGpAPPft7gAbsBP775JcD1jNX+TWBqiu3yPQ83OAQ?= =?us-ascii?Q?ivu+F/SdCKZWwaOgNJca9VHPqnzMKKHd3hWjJ7UixGCuUzmUZZIQ4M4WYNbf?= =?us-ascii?Q?G0peC3FItFXSMb8+kWteYhh8WFk4XlA/0Lu9MzlLcHsFqsaQl+YtpJXS3Mbw?= =?us-ascii?Q?fvqyg2hwr04lqfzZAM023m0qzXBTmsp3wbZ7PLPtatTkvWiXOgz2oaud8qnh?= =?us-ascii?Q?b6xPoVWZeXOk3pu8gOL/rJ6RH4RHD8f8Z4hzhnSDu0IGneBCNgJBKV0oUBV/?= =?us-ascii?Q?FI7xhNhes57INdWfuRE4fUk=3D?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0aa4aa3e-93c8-42f7-0f31-08d9aa0b2373 X-MS-Exchange-CrossTenant-AuthSource: PAXPR04MB9186.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Nov 2021 20:45:06.7433 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: MqiMNzpHG9Q0HmJizwnx74gL6JJwB1SxE14IyadOlquh1jXgglQ5YcggOqilg5oenApkmeVzjdFiS0u31TsmPA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PAXPR04MB8512 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This issue was found at android12 MTP. 1. MTP submit many out urb request. 2. Cancel left requests (>20) when enough data get from host 3. Send ACK by IN endpoint. 4. MTP submit new out urb request. 5. 4's urb never complete. TRACE LOG: MtpServer-2157 [000] d..3 1287.150391: cdns3_ep_dequeue: ep1out: req: 00000000299e6836, req buff 000000009df42287, length: 0/16384 zsi, status: -115, trb: [start:87, end:87: virt addr 0x80004000ffd50420], flags:1 SID: 0 MtpServer-2157 [000] d..3 1287.150410: cdns3_gadget_giveback: ep1out: req: 00000000299e6836, req buff 000000009df42287, length: 0/16384 zsi, status: -104, trb: [start:87, end:87: virt addr 0x80004000ffd50420], flags:0 SID: 0 MtpServer-2157 [000] d..3 1287.150433: cdns3_ep_dequeue: ep1out: req: 0000000080b7bde6, req buff 000000009ed5c556, length: 0/16384 zsi, status: -115, trb: [start:88, end:88: virt addr 0x80004000ffd5042c], flags:1 SID: 0 MtpServer-2157 [000] d..3 1287.150446: cdns3_gadget_giveback: ep1out: req: 0000000080b7bde6, req buff 000000009ed5c556, length: 0/16384 zsi, status: -104, trb: [start:88, end:88: virt addr 0x80004000ffd5042c], flags:0 SID: 0 .... MtpServer-2157 [000] d..1 1293.630410: cdns3_alloc_request: ep1out: req: 00000000afbccb7d, req buff 0000000000000000, length: 0/0 zsi, status: 0, trb: [start:0, end:0: virt addr (null)], flags:0 SID: 0 MtpServer-2157 [000] d..2 1293.630421: cdns3_ep_queue: ep1out: req: 00000000afbccb7d, req buff 00000000871caf90, length: 0/512 zsi, status: -115, trb: [start:0, end:0: virt addr (null)], flags:0 SID: 0 MtpServer-2157 [000] d..2 1293.630445: cdns3_wa1: WA1: ep1out set guard MtpServer-2157 [000] d..2 1293.630450: cdns3_wa1: WA1: ep1out restore cycle bit MtpServer-2157 [000] d..2 1293.630453: cdns3_prepare_trb: ep1out: trb 000000007317b3ee, dma buf: 0xffd5bc00, size: 512, burst: 128 ctrl: 0x00000424 (C=0, T=0, ISP, IOC, Normal) SID:0 LAST_SID:0 MtpServer-2157 [000] d..2 1293.630460: cdns3_doorbell_epx: ep1out, ep_trbaddr ffd50414 .... irq/241-5b13000-2154 [000] d..1 1293.680849: cdns3_epx_irq: IRQ for ep1out: 01000408 ISP , ep_traddr: ffd508ac ep_last_sid: 00000000 use_streams: 0 irq/241-5b13000-2154 [000] d..1 1293.680858: cdns3_complete_trb: ep1out: trb 0000000021a11b54, dma buf: 0xffd50420, size: 16384, burst: 128 ctrl: 0x00001810 (C=0, T=0, CHAIN, LINK) SID:0 LAST_SID:0 irq/241-5b13000-2154 [000] d..1 1293.680865: cdns3_request_handled: Req: 00000000afbccb7d not handled, DMA pos: 185, ep deq: 88, ep enq: 185, start trb: 184, end trb: 184 Actually DMA pos already bigger than prevous submit request afbccb7d's TRB (184-184). The reason of (not handled) is that deq position is wrong. The TRB link is below when irq happen. DEQ LINK LINK LINK LINK LINK .... TRB(afbccb7d):START DMA(EP_TRADDR). Original code check LINK TRB, but DEQ just move one step. LINK DEQ LINK LINK LINK LINK .... TRB(afbccb7d):START DMA(EP_TRADDR). This patch skip all LINK TRB and sync DEQ to trb's start. LINK LINK LINK LINK LINK .... DEQ = TRB(afbccb7d):START DMA(EP_TRADDR). Signed-off-by: Frank Li Signed-off-by: Jun Li --- drivers/usb/cdns3/cdns3-gadget.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-) diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c index 1f3b4a1422126..01d0e09a87ad7 100644 --- a/drivers/usb/cdns3/cdns3-gadget.c +++ b/drivers/usb/cdns3/cdns3-gadget.c @@ -337,17 +337,21 @@ static void cdns3_ep_inc_deq(struct cdns3_endpoint *priv_ep) cdns3_ep_inc_trb(&priv_ep->dequeue, &priv_ep->ccs, priv_ep->num_trbs); } -static void cdns3_move_deq_to_next_trb(struct cdns3_request *priv_req) +static void cdns3_sync_deq_to_trb(struct cdns3_request *priv_req) { struct cdns3_endpoint *priv_ep = priv_req->priv_ep; - int current_trb = priv_req->start_trb; + struct cdns3_trb *trb = priv_ep->trb_pool + priv_ep->dequeue; - while (current_trb != priv_req->end_trb) { - cdns3_ep_inc_deq(priv_ep); - current_trb = priv_ep->dequeue; - } + if (TRB_FIELD_TO_TYPE(le32_to_cpu(trb->control)) == TRB_LINK) { + while (priv_ep->dequeue != priv_req->start_trb) { + dev_dbg(priv_ep->cdns3_dev->dev, "Remove TRB_LINK"); + trb = priv_ep->trb_pool + priv_ep->dequeue; + WARN_ON_ONCE(TRB_FIELD_TO_TYPE(le32_to_cpu(trb->control)) != TRB_LINK); + trace_cdns3_complete_trb(priv_ep, trb); - cdns3_ep_inc_deq(priv_ep); + cdns3_ep_inc_deq(priv_ep); + } + } } /** @@ -1518,10 +1522,7 @@ static void cdns3_transfer_completed(struct cdns3_device *priv_dev, trb = priv_ep->trb_pool + priv_ep->dequeue; /* Request was dequeued and TRB was changed to TRB_LINK. */ - if (TRB_FIELD_TO_TYPE(le32_to_cpu(trb->control)) == TRB_LINK) { - trace_cdns3_complete_trb(priv_ep, trb); - cdns3_move_deq_to_next_trb(priv_req); - } + cdns3_sync_deq_to_trb(priv_req); if (!request->stream_id) { /* Re-select endpoint. It could be changed by other CPU -- 2.24.0.rc1