From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 804811D173F; Wed, 6 Nov 2024 12:20:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730895638; cv=none; b=U2sLt144KxcPbx/IoaTlwXEigMTIhpaisaD6z3MHGFXd5IV7HBBIfhzQpSiIZvgSkptOV9pCB7QJWkGBh6CZOc9I13L8Aleb2T9Kr9inqGKHYEnowgkUPPpM+tEThkvKD1NPFJD5QS6kl5rwdudLUxdSoqOSG4WRfB+vC5yD9dY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730895638; c=relaxed/simple; bh=M9sLvhATp9GosYqJURjSX9T5UjysBlqwB7f8Nnq9bOQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=rssIEhKpw+sopatIshpNPKi5e2oJWEZXCLwEcVDavzFu+AYXT4EJfCJvEXkoBG0gWrnVzR6QqsEci8+SKqZBDB5NtbXOdn8qXCZwMG8HlX00hT2Oufdwmasi5rY5ek0gHHGrJMUTQvAiVtIBwhZEXrTf/G0OX4Qprq5L0IsqPHg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=q6z+Zr72; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="q6z+Zr72" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 05B1DC4CECD; Wed, 6 Nov 2024 12:20:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1730895638; bh=M9sLvhATp9GosYqJURjSX9T5UjysBlqwB7f8Nnq9bOQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=q6z+Zr72Kka4q0n63RZpWEm22xpC0nnuWw3RE8cTf/INfEJ5nLExPnCir9QU1DbOc xcn41QkjxRQwSAk+QV0vq3itCNgT9M0KU1CvAdM6fRbKy/vuw9XiMWxOWL964wwZiO p9Ur6SXWweBHoGfmMR4esgRa+lYRQCLgl0wUo12Q= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Luiz Augusto von Dentz Subject: [PATCH 4.19 284/350] Bluetooth: btusb: Fix regression with fake CSR controllers 0a12:0001 Date: Wed, 6 Nov 2024 13:03:32 +0100 Message-ID: <20241106120327.862701847@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241106120320.865793091@linuxfoundation.org> References: <20241106120320.865793091@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Luiz Augusto von Dentz commit 2c1dda2acc4192d826e84008d963b528e24d12bc upstream. Fake CSR controllers don't seem to handle short-transfer properly which cause command to time out: kernel: usb 1-1: new full-speed USB device number 19 using xhci_hcd kernel: usb 1-1: New USB device found, idVendor=0a12, idProduct=0001, bcdDevice=88.91 kernel: usb 1-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0 kernel: usb 1-1: Product: BT DONGLE10 ... Bluetooth: hci1: Opcode 0x1004 failed: -110 kernel: Bluetooth: hci1: command 0x1004 tx timeout According to USB Spec 2.0 Section 5.7.3 Interrupt Transfer Packet Size Constraints a interrupt transfer is considered complete when the size is 0 (ZPL) or < wMaxPacketSize: 'When an interrupt transfer involves more data than can fit in one data payload of the currently established maximum size, all data payloads are required to be maximum-sized except for the last data payload, which will contain the remaining data. An interrupt transfer is complete when the endpoint does one of the following: • Has transferred exactly the amount of data expected • Transfers a packet with a payload size less than wMaxPacketSize or transfers a zero-length packet' Link: https://bugzilla.kernel.org/show_bug.cgi?id=219365 Fixes: 7b05933340f4 ("Bluetooth: btusb: Fix not handling ZPL/short-transfer") Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Greg Kroah-Hartman --- drivers/bluetooth/btusb.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -743,10 +743,15 @@ static int btusb_submit_intr_urb(struct if (!urb) return -ENOMEM; - /* Use maximum HCI Event size so the USB stack handles - * ZPL/short-transfer automatically. - */ - size = HCI_MAX_EVENT_SIZE; + if (le16_to_cpu(data->udev->descriptor.idVendor) == 0x0a12 && + le16_to_cpu(data->udev->descriptor.idProduct) == 0x0001) + /* Fake CSR devices don't seem to support sort-transter */ + size = le16_to_cpu(data->intr_ep->wMaxPacketSize); + else + /* Use maximum HCI Event size so the USB stack handles + * ZPL/short-transfer automatically. + */ + size = HCI_MAX_EVENT_SIZE; buf = kmalloc(size, mem_flags); if (!buf) {