From patchwork Tue Sep 1 05:00:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: William Sung X-Patchwork-Id: 297782 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 76F0CC433E6 for ; Tue, 1 Sep 2020 05:10:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5B2002098B for ; Tue, 1 Sep 2020 05:10:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726050AbgIAFKa (ORCPT ); Tue, 1 Sep 2020 01:10:30 -0400 Received: from aclms3.advantech.com.tw ([125.252.70.86]:13166 "EHLO ACLMS3.advantech.com.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725930AbgIAFKa (ORCPT ); Tue, 1 Sep 2020 01:10:30 -0400 X-Greylist: delayed 602 seconds by postgrey-1.27 at vger.kernel.org; Tue, 01 Sep 2020 01:10:29 EDT Received: from taipei09.ADVANTECH.CORP (unverified [172.20.0.236]) by ACLMS3.advantech.com.tw (Clearswift SMTPRS 5.6.0) with ESMTP id ; Tue, 1 Sep 2020 13:00:23 +0800 Received: from localhost (172.16.12.96) by taipei09.ADVANTECH.CORP (172.20.0.236) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 1 Sep 2020 13:00:22 +0800 From: William Sung To: Johan Hovold , Greg Kroah-Hartman , , , William Sung , Campion Kang Subject: [PATCH 2/2] usb: serial: usb_wwan: Fix lackage for Quectel EG95 LTE modem support Date: Tue, 1 Sep 2020 13:00:22 +0800 Message-ID: <20200901050022.3319-2-william.sung@advantech.com.tw> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200901050022.3319-1-william.sung@advantech.com.tw> References: <20200901050022.3319-1-william.sung@advantech.com.tw> MIME-Version: 1.0 X-Originating-IP: [172.16.12.96] X-ClientProxiedBy: ACLDAG.ADVANTECH.CORP (172.20.2.88) To taipei09.ADVANTECH.CORP (172.20.0.236) X-StopIT: No Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org As required by the USB protocol, add zero packet support for Quectel EG95 LTE modem module. Fixes: f815dd5cf48b ("net: usb: qmi_wwan: add support for Quectel EG95 LTE modem" Signed-off-by: William Sung --- drivers/usb/serial/usb_wwan.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c index 4b9845807bee..75495c939ac6 100644 --- a/drivers/usb/serial/usb_wwan.c +++ b/drivers/usb/serial/usb_wwan.c @@ -467,6 +467,7 @@ static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port, struct usb_serial *serial = port->serial; struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial); struct urb *urb; + struct usb_device_descriptor *desc = &serial->dev->descriptor; urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */ if (!urb) @@ -476,8 +477,15 @@ static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port, usb_sndbulkpipe(serial->dev, endpoint) | dir, buf, len, callback, ctx); - if (intfdata->use_zlp && dir == USB_DIR_OUT) - urb->transfer_flags |= URB_ZERO_PACKET; + if (dir == USB_DIR_OUT) { + if (intfdata->use_zlp) + urb->transfer_flags |= URB_ZERO_PACKET; + + /* Add zero packet support for Quectel EG95 */ + if (desc->idVendor == cpu_to_le16(0x2C7C) && + desc->idProduct == cpu_to_le16(0x0195)) + urb->transfer_flags |= URB_ZERO_PACKET; + } return urb; }