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Fri, 6 Sep 2024 06:48:54 +0000 From: Pawel Laszczak To: "peter.chen@kernel.org" CC: "gregkh@linuxfoundation.org" , "linux-usb@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Pawel Laszczak , "stable@vger.kernel.org" Subject: [PATCH v2] usb: cdnsp: Fix incorrect usb_request status Thread-Topic: [PATCH v2] usb: cdnsp: Fix incorrect usb_request status Thread-Index: AQHbACh/YWJ76qtKVEGX/ynC8VwZfLJKUNRg Date: Fri, 6 Sep 2024 06:48:54 +0000 Message-ID: References: <20240906064547.265943-1-pawell@cadence.com> In-Reply-To: <20240906064547.265943-1-pawell@cadence.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-dg-ref: PG1ldGE+PGF0IGFpPSIwIiBubT0iYm9keS50eHQiIHA9ImM6XHVzZXJzXHBhd2VsbFxhcHBkYXRhXHJvYW1pbmdcMDlkODQ5YjYtMzJkMy00YTQwLTg1ZWUtNmI4NGJhMjllMzViXG1zZ3NcbXNnLTEzODJlMTJhLTZjMWMtMTFlZi1hOGI1LTYwYTVlMjViOTZhM1xhbWUtdGVzdFwxMzgyZTEyYy02YzFjLTExZWYtYThiNS02MGE1ZTI1Yjk2YTNib2R5LnR4dCIgc3o9IjQyNjYiIHQ9IjEzMzcwMDc4OTMyNDA4MzI5MyIgaD0idnBBVmJ2ZzBzSHFlMWUvZDBSZUVDVmlQMGkwPSIgaWQ9IiIgYmw9IjAiIGJvPSIxIi8+PC9tZXRhPg== x-dg-rorf: true x-ms-publictraffictype: Email x-ms-traffictypediagnostic: PH7PR07MB9538:EE_|CO1PR07MB9052:EE_ x-ms-office365-filtering-correlation-id: 99966141-cdcc-4ce4-f78e-08dcce3ff9b4 x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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Before fix the status returned during dequeuing requests while disabling endpoint was ECONNRESET. Patch change it to ESHUTDOWN. Patch fixes issue detected during testing UVC gadget. During stopping streaming the class starts dequeuing usb requests and controller driver returns the -ECONNRESET status. After completion requests the class or application "uvc-gadget" try to queue this request again. Changing this status to ESHUTDOWN cause that UVC assumes that endpoint is disabled, or device is disconnected and stops re-queuing usb requests. Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver") cc: stable@vger.kernel.org Signed-off-by: Pawel Laszczak --- Changelog: v2: - added explanation of issue drivers/usb/cdns3/cdnsp-ring.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/usb/cdns3/cdnsp-ring.c b/drivers/usb/cdns3/cdnsp-ring.c index 1e011560e3ae..bccc8fc143d0 100644 --- a/drivers/usb/cdns3/cdnsp-ring.c +++ b/drivers/usb/cdns3/cdnsp-ring.c @@ -718,7 +718,8 @@ int cdnsp_remove_request(struct cdnsp_device *pdev, seg = cdnsp_trb_in_td(pdev, cur_td->start_seg, cur_td->first_trb, cur_td->last_trb, hw_deq); - if (seg && (pep->ep_state & EP_ENABLED)) + if (seg && (pep->ep_state & EP_ENABLED) && + !(pep->ep_state & EP_DIS_IN_RROGRESS)) cdnsp_find_new_dequeue_state(pdev, pep, preq->request.stream_id, cur_td, &deq_state); else @@ -736,7 +737,8 @@ int cdnsp_remove_request(struct cdnsp_device *pdev, * During disconnecting all endpoint will be disabled so we don't * have to worry about updating dequeue pointer. */ - if (pdev->cdnsp_state & CDNSP_STATE_DISCONNECT_PENDING) { + if (pdev->cdnsp_state & CDNSP_STATE_DISCONNECT_PENDING || + pep->ep_state & EP_DIS_IN_RROGRESS) { status = -ESHUTDOWN; ret = cdnsp_cmd_set_deq(pdev, pep, &deq_state); }