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Sun, 8 Dec 2024 15:13:49 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp2.samsung.com (KnoxPortal) with ESMTP id 20241208151349epsmtrp2cd3e7a68dab94fd191db992fe8c0d65a~PPG8LlnV23147231472epsmtrp2W; Sun, 8 Dec 2024 15:13:49 +0000 (GMT) X-AuditID: b6c32a50-7ebff7000000721c-b6-6755b7ae32da Received: from epsmtip1.samsung.com ( [182.195.34.30]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id 67.DB.18729.DA7B5576; Mon, 9 Dec 2024 00:13:49 +0900 (KST) Received: from INBRO002811.samsungds.net (unknown [107.122.5.126]) by epsmtip1.samsung.com (KnoxPortal) with ESMTPA id 20241208151346epsmtip1b0991e1038d8971f7e54e5d946d91236~PPG5qH4TH3235832358epsmtip1Y; Sun, 8 Dec 2024 15:13:46 +0000 (GMT) From: Faraz Ata To: gregkh@linuxfoundation.org, quic_jjohnson@quicinc.com, kees@kernel.org, abdul.rahim@myyahoo.com, m.grzeschik@pengutronix.de, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Cc: jh0801.jung@samsung.com, dh10.jung@samsung.com, naushad@samsung.com, akash.m5@samsung.com, rc93.raju@samsung.com, taehyun.cho@samsung.com, hongpooh.kim@samsung.com, eomji.oh@samsung.com, shijie.cai@samsung.com, alim.akhtar@samsung.com, Selvarasu Ganesan , stable@vger.kernel.org Subject: [PATCH] usb: gadget: f_midi: Fixing wMaxPacketSize exceeded issue during MIDI bind retries Date: Sun, 8 Dec 2024 20:43:13 +0530 Message-ID: <20241208151314.1625-1-faraz.ata@samsung.com> X-Mailer: git-send-email 2.46.0.windows.1 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA01TaUxUVxT2vm0epIOvA4QbtDh9jaUYlpky4GXT2pJmghpRoo1aO7zCc4bC LJ1FuxAjoSiQgmWTAMM4VaLJoFDosMhi4zhKa4tdqK0JYJHYxiAgBWWpMXQeT1v/feec75zv fufeS+Oyi1QonWOw8mYDl8dS/kTnlYjwqJau3VqFvTYE1Z5sI9HkTReJxhydFBpxnsTQ9XNf YqjwTCuFKvs6CDR6Z5FALVM/kmiox06h02eLcOQ+9iuGZq8uk6jAPUoiV4mdQN5zf2NoaOEi jpxt4wBVXg5+I1Dd7iqh1N80npeor90bkKhPPFGoK/qOqMvdLqCeaw9Ll+zLTdbxXDZvlvOG LGN2jkGbwm7N0LyliYtXKKOUCWgjKzdwej6FTd2WHvV2Tp7PCSs/xOXZfKl0zmJhYzYlm402 Ky/XGS3WFJY3ZeeZVKZoC6e32AzaaANvTVQqFK/H+YiZubrh4z2EqS3gI89YMXYUnHihFPjR kFHBb2frgIBlTB+A7VXhpcDfh2cBLDs1h4mFeQAnR5OfNTwqd1AiqR/AhsG7mBgsAFgzOUMK LIoJh3W3vIRQCBLGDt52S4QAZ3ox6Br7QyKwAhkedtzsXxEnmPXws6+9vrk0LWUS4NLSh6Jc BLzQ37dyDCnzIvyu7i4hYJxZBws7GnBhJmS6adi7eAkXG1Lhn43DlIgD4cSAWyLiUDg33f80 vw1WXZ0HghZkdHDkQpCY3gybnT+QQhr36bb2xIhSAbDssWBSYEth8TGZyF4PrxcMPR24Bt5u +o0UsRpOzlwhxMUdgBPjrZIvQFj9cwbqnzNQ/7+YE+AuEMqbLHotnxVnUkYZ+MP/3WWWUd8O Vt7whvRu0PzVk2gPwGjgAZDG2SApvXW3VibN5j7+hDcbNWZbHm/xgDjfVivw0OAso+8TGKwa pSpBoYqPj1clxMYr2RDp/aLGbBmj5ax8Ls+bePOzPoz2Cz2KvboqDf2040xTrvFeUre3ev5A 1ZGRWPnaamlzwwdUV1riZOfPul3XUOoNmk2UKXpLkzDnnodv5i/eSokko9KazC7HuMZct5Sm AcMP9zQevlyxPAxj3k2qyZ/eoffuW9MQ1mj5vhaURfOXMjI34kOzDybIvjtq21qnI6Tzr9hy 237dO6c8lcx0gB3XrHZPOTL9FnauSjLt8h98z76d9C4+/h0FR26pjiiZf183nLicsWl/7H3d Lz2byfbq7pZ/HvkRXU7KWnTw5ZoH7s/LBgrbZkoce9dxU5H2s1Z4KCdEXpu15YZnb8bBlwpe M6zePo2hT8eJCur4eTIxLL84JfIVlrDoOOUG3Gzh/gXhjFNvTAQAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrMLMWRmVeSWpSXmKPExsWy7bCSnO7a7aHpBjdXsllMn7aR1eLN1VWs Fg/mbWOzuLNgGpPFqeULmSyaF69ns5i0ZyuLxd2HP1gs1r09z2pxedccNotFy1qZLba0XWGy +HT0P6tF45a7rBarOuewWBxZ/pHJ4vL3ncwWCzY+YrSYdFDUQdhj06pONo/9c9ewexx7cZzd o/+vgcfEPXUefVtWMXp83iQXwB7FZZOSmpNZllqkb5fAlXG7fRdLwUa+ikMPOpgaGPt5uhg5 OSQETCS+9s1j62Lk4hAS2M0o0fhxKgtEQlri9awuRghbWGLlv+fsEEVfGSU6/39gA0mwCahL zLxxhAUkISJwhFFi9f+brCAOs8BJJonmr4/ARgkLJEtMbbsJ1sEioCrRsvkIkM3BwStgKfHz ZyHEBk2JtXv3MIHYvAKCEidnPgFrZRaQl2jeOpt5AiPfLCSpWUhSCxiZVjFKphYU56bnFhsW GOallusVJ+YWl+al6yXn525iBMeLluYOxu2rPugdYmTiYDzEKMHBrCTCy+Edmi7Em5JYWZVa lB9fVJqTWnyIUZqDRUmcV/xFb4qQQHpiSWp2ampBahFMlomDU6qBKepfyjYW1RmTmo2tezhe vJ33+9C2jPlRVTnzdm9drZJ1Ll/U1UGiZvqlSc3JG1smdTyYJmnoPJX7+627+3R01uuU3JT9 /f3rJHlLocs6k2JWPWoIvH2vciPHnSQbb78FS38+bLU88uXfjHcK3R9LnrNXL8y5e2gqQ0T2 CSnd7etvt6nHeguaSLy456Y4obexd2WeBa+asKimbMtH/dbTAp43ZswpYZ3M1CtpFFpbXsU/ 6cJz32ZprpyX5qbrmf6YcU74sdiraGuyrcqMa10NGibPjm5PfH1BTLlSZW+t0I+VNd1NfHob Nm0/E3liy5azLpfTKvh0ejY0v2usnBMmVbPe28qzT+WUVO4055YpSizFGYmGWsxFxYkAqr4/ ewYDAAA= X-CMS-MailID: 20241208151349epcas5p1a94ca45020318f54885072d4987160b3 X-Msg-Generator: CA CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20241208151349epcas5p1a94ca45020318f54885072d4987160b3 References: From: Selvarasu Ganesan The current implementation sets the wMaxPacketSize of bulk in/out endpoints to 1024 bytes at the end of the f_midi_bind function. However, in cases where there is a failure in the first midi bind attempt, consider rebinding. This scenario may encounter an f_midi_bind issue due to the previous bind setting the bulk endpoint's wMaxPacketSize to 1024 bytes, which exceeds the ep->maxpacket_limit where configured TX/RX FIFO's maxpacket size of 512 bytes for IN/OUT endpoints in support HS speed only. This commit addresses this issue by resetting the wMaxPacketSize before endpoint claim Fixes: 46decc82ffd5 ("usb: gadget: unconditionally allocate hs/ss descriptor in bind operation") Cc: stable@vger.kernel.org Signed-off-by: Selvarasu Ganesan --- drivers/usb/gadget/function/f_midi.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c index 837fcdfa3840..5caa0e4eb07e 100644 --- a/drivers/usb/gadget/function/f_midi.c +++ b/drivers/usb/gadget/function/f_midi.c @@ -907,6 +907,15 @@ static int f_midi_bind(struct usb_configuration *c, struct usb_function *f) status = -ENODEV; + /* + * Reset wMaxPacketSize with maximum packet size of FS bulk transfer before + * endpoint claim. This ensures that the wMaxPacketSize does not exceed the + * limit during bind retries where configured TX/RX FIFO's maxpacket size + * of 512 bytes for IN/OUT endpoints in support HS speed only. + */ + bulk_in_desc.wMaxPacketSize = cpu_to_le16(64); + bulk_out_desc.wMaxPacketSize = cpu_to_le16(64); + /* allocate instance-specific endpoints */ midi->in_ep = usb_ep_autoconfig(cdev->gadget, &bulk_in_desc); if (!midi->in_ep)