Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Received-SPF: Pass (protection.outlook.com: domain of xilinx.com designates
 149.199.60.83 as permitted sender) receiver=protection.outlook.com;
 client-ip=149.199.60.83; helo=xsj-pvapsmtpgw01;
From:   Anurag Kumar Vulisha <anurag.kumar.vulisha@xilinx.com>
To:     <balbi@kernel.org>, <gregkh@linuxfoundation.org>
CC:     <v.anuragkumar@gmail.com>, <linux-usb@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        Anurag Kumar Vulisha <anurag.kumar.vulisha@xilinx.com>
Subject: [PATCH 5/8] usb: dwc3: don't issue no-op trb for stream capable endpoints
Date:   Wed, 25 Jul 2018 17:21:28 +0530
Message-ID: <1532519491-19502-6-git-send-email-anurag.kumar.vulisha@xilinx.com>
In-Reply-To: <1532519491-19502-1-git-send-email-anurag.kumar.vulisha@xilinx.com>
References: <1532519491-19502-1-git-send-email-anurag.kumar.vulisha@xilinx.com>
MIME-Version: 1.0
Content-Type: text/plain
SpamDiagnosticOutput: 1:99
SpamDiagnosticMetadata: NSPM
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Jul 2018 11:51:56.2399
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: def3443b-e7b1-4a1b-a631-08d5f22506a4
X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.60.83];Helo=[xsj-pvapsmtpgw01]
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY2PR02MB1622
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

The stream capable endpoints require stream id to be given
when issuing START TRANSFER. While issuing no-op trb the
stream id is not yet known, so don't issue no-op trb's on
stream capable endpoints.

Signed-off-by: Anurag Kumar Vulisha <anurag.kumar.vulisha@xilinx.com>
---
 drivers/usb/dwc3/gadget.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index e2ccb55..af8d470 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -668,7 +668,7 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, unsigned int action)
 	 * Issue StartTransfer here with no-op TRB so we can always rely on No
 	 * Response Update Transfer command.
 	 */
-	if (usb_endpoint_xfer_bulk(desc) ||
+	if ((usb_endpoint_xfer_bulk(desc) && !dep->stream_capable) ||
 			usb_endpoint_xfer_int(desc)) {
 		struct dwc3_gadget_ep_cmd_params params;
 		struct dwc3_trb	*trb;
-- 
2.1.1