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 A980116F27E; Mon, 21 Oct 2024 10:47:46 +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=1729507666; cv=none; b=Xi7gl6LvQ7tcAc59FPhuCThwdAxeJ0x0hKvEk8gaoypj78X1YPjbbPb1lg/1EJZl2bC79cFoe0NSYhNnPX6zjOZ7W3YUwP6/K2Pv0q0wCgQdWhi9abhIqfoDMNVrYCTe/BqnPb6lmO2TtksjjTyK+IKjibWLHGKMkzsu8qxYpHQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729507666; c=relaxed/simple; bh=78ZIRm2rz6EU+HMxz4cHqD5I8foJVCO/aTlUaASAEEk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=mHNEhvo9Izvtk+LBIS1qNAlFCOqdvbXPCiYmWUpXqNHXK9yvrNTj6wikeG2VLRO0CtwtkhdIQvy2HG5pkPhCuG/lL1P3ONPkeUA3Y6xTyl3emIWLvoi2mnW+24P5N/goyJ5TTYIu/PU25fTyZrAVwfHZBnoThMxaJL3VzKm7m78= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=OV3KvP44; 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="OV3KvP44" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 28B60C4CEC3; Mon, 21 Oct 2024 10:47:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1729507666; bh=78ZIRm2rz6EU+HMxz4cHqD5I8foJVCO/aTlUaASAEEk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OV3KvP44bN/CjnkbNzg5ClRkqRiKayWsuH9oXcDwpThKNT8Kovm9l32ENlKJaLwq3 JURjKsX4p+YkcRhhSPRokew08WeDMLuJzb8pwwF5k/luxzhA42/1Zi2tqAZ4wJToMM uW/YMB0PcAjhQC0gvdE9Msr56wB+Jw1OlKw5rYmY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Luiz Augusto von Dentz Subject: [PATCH 5.15 62/82] Bluetooth: btusb: Fix regression with fake CSR controllers 0a12:0001 Date: Mon, 21 Oct 2024 12:25:43 +0200 Message-ID: <20241021102249.680332142@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241021102247.209765070@linuxfoundation.org> References: <20241021102247.209765070@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 5.15-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 @@ -1002,10 +1002,15 @@ 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) {