From patchwork Fri Nov 26 11:09:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neal Liu X-Patchwork-Id: 12693752 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0EC54C4332F for ; Fri, 26 Nov 2021 13:08:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=zmp2lE3B3lH5fXT9XpBxErJIrTLDu2BbjoNlzQSgG4E=; b=nZxmfwYHDzqKAf MOnCVpIJkdma73i0/QoFHkvNLKG7cfqATeTMZGqeyfL7W2B+8QeVtpOT7983Hwtp5EOLUe50CEMlf 5iMf0X1S+TcIjWEUAPVrEpzI4JZObThgBaPcPk/P1AqvZ+zpd5hr2wlxSzxdC2n2irRi9kiFC5CBk 1SNkP9RMz0V4YAvlKrjGnWWbYhEiIq0g+t5CryZf7OWogbpq56Q9oyWwOaF0YadVPw/OFKqvqSdCx zfom4QZ4NqIYwOx/jyBFOr/OYy09yvQsIpYieYnSx2bdcxQIIDwoCyFu2uxQk3S9tuWsz/k9I1nPD 2IKTSbwA591UpMh9+XoQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqaw3-00AXUq-FU; Fri, 26 Nov 2021 13:06:39 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqavf-00AXLa-GI for linux-arm-kernel@bombadil.infradead.org; Fri, 26 Nov 2021 13:06:15 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:Content-Transfer-Encoding :MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From: Sender:Reply-To:Content-ID:Content-Description; bh=8tyo7gjPbdWjSP1k6/CpLlLA/QaRUCAmMhkjH5IjBOg=; b=k34SWtWXWsPCIBV7CvH4zgTMX1 Gm+q1OSprDS1XCxCNVIkU2dNHIdnQ7p7kSm18QUPYhPUg+N4BPQUPXbP/K0SdREavIQwtv9iQy+6s JWiHOOVU6+KynyTOEo+MY1YnkNlMk60hMfiCs4NqnRo4638oApfsnMlAqfRaepirbYqyO5tXo3xkP ufYLd8srNQmAOQSmOCFqv8cGMJ94lJnaXD8WxuyVZOt+MNKfslNsK5N1FXlAgZa7k+HVfhubbexVa HUm3TmV5LMEmOoosGRxcAC9tZLrlu+Zxz5V/PnQxDR3jvw6e9q+uZhQXFLfhnEW8OrWLFfn+5+E/X AOkzdTiA==; Received: from twspam01.aspeedtech.com ([211.20.114.71]) by desiato.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqZ9v-000hV3-9N for linux-arm-kernel@lists.infradead.org; Fri, 26 Nov 2021 11:12:56 +0000 Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 1AQAjlvc048315; Fri, 26 Nov 2021 18:45:47 +0800 (GMT-8) (envelope-from neal_liu@aspeedtech.com) Received: from localhost.localdomain (192.168.10.10) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 26 Nov 2021 19:10:03 +0800 From: Neal Liu To: Felipe Balbi , Greg Kroah-Hartman , Joel Stanley , Andrew Jeffery , Cai Huoqing , Tao Ren , Julia Lawall , "kernel test robot" , Sasha Levin , , , , CC: Neal Liu , Subject: [PATCH 1/3] usb: aspeed-vhub: add qualifier descriptor Date: Fri, 26 Nov 2021 19:09:52 +0800 Message-ID: <20211126110954.2677627-2-neal_liu@aspeedtech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211126110954.2677627-1-neal_liu@aspeedtech.com> References: <20211126110954.2677627-1-neal_liu@aspeedtech.com> MIME-Version: 1.0 X-Originating-IP: [192.168.10.10] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 1AQAjlvc048315 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211126_111251_960586_3541CD0E X-CRM114-Status: GOOD ( 13.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Support qualifier descriptor to pass USB30CV compliance test. Signed-off-by: Neal Liu --- drivers/usb/gadget/udc/aspeed-vhub/hub.c | 29 ++++++++++++++++++++--- drivers/usb/gadget/udc/aspeed-vhub/vhub.h | 2 ++ 2 files changed, 28 insertions(+), 3 deletions(-) diff --git a/drivers/usb/gadget/udc/aspeed-vhub/hub.c b/drivers/usb/gadget/udc/aspeed-vhub/hub.c index b9960fdd8a51..d76f83bc7762 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/hub.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/hub.c @@ -68,6 +68,18 @@ static const struct usb_device_descriptor ast_vhub_dev_desc = { .bNumConfigurations = 1, }; +static const struct usb_qualifier_descriptor ast_vhub_qual_desc = { + .bLength = 0xA, + .bDescriptorType = USB_DT_DEVICE_QUALIFIER, + .bcdUSB = cpu_to_le16(0x0200), + .bDeviceClass = USB_CLASS_HUB, + .bDeviceSubClass = 0, + .bDeviceProtocol = 0, + .bMaxPacketSize0 = 64, + .bNumConfigurations = 1, + .bRESERVED = 0, +}; + /* * Configuration descriptor: same comments as above * regarding handling USB1 mode. @@ -271,9 +283,11 @@ static int ast_vhub_rep_desc(struct ast_vhub_ep *ep, BUILD_BUG_ON(dsize > sizeof(vhub->vhub_dev_desc)); BUILD_BUG_ON(USB_DT_DEVICE_SIZE >= AST_VHUB_EP0_MAX_PACKET); break; + case USB_DT_OTHER_SPEED_CONFIG: case USB_DT_CONFIG: dsize = AST_VHUB_CONF_DESC_SIZE; memcpy(ep->buf, &vhub->vhub_conf_desc, dsize); + ((u8 *)ep->buf)[1] = desc_type; BUILD_BUG_ON(dsize > sizeof(vhub->vhub_conf_desc)); BUILD_BUG_ON(AST_VHUB_CONF_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET); break; @@ -283,6 +297,10 @@ static int ast_vhub_rep_desc(struct ast_vhub_ep *ep, BUILD_BUG_ON(dsize > sizeof(vhub->vhub_hub_desc)); BUILD_BUG_ON(AST_VHUB_HUB_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET); break; + case USB_DT_DEVICE_QUALIFIER: + dsize = sizeof(vhub->vhub_qual_desc); + memcpy(ep->buf, &vhub->vhub_qual_desc, dsize); + break; default: return std_req_stall; } @@ -417,10 +435,9 @@ enum std_req_rc ast_vhub_std_hub_request(struct ast_vhub_ep *ep, /* GET/SET_CONFIGURATION */ case DeviceRequest | USB_REQ_GET_CONFIGURATION: - return ast_vhub_simple_reply(ep, 1); + return ast_vhub_simple_reply(ep, vhub->current_config); case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: - if (wValue != 1) - return std_req_stall; + vhub->current_config = wValue; return std_req_complete; /* GET_DESCRIPTOR */ @@ -428,6 +445,8 @@ enum std_req_rc ast_vhub_std_hub_request(struct ast_vhub_ep *ep, switch (wValue >> 8) { case USB_DT_DEVICE: case USB_DT_CONFIG: + case USB_DT_DEVICE_QUALIFIER: + case USB_DT_OTHER_SPEED_CONFIG: return ast_vhub_rep_desc(ep, wValue >> 8, wLength); case USB_DT_STRING: @@ -1033,6 +1052,10 @@ static int ast_vhub_init_desc(struct ast_vhub *vhub) else ret = ast_vhub_str_alloc_add(vhub, &ast_vhub_strings); + /* Initialize vhub Qualifier Descriptor. */ + memcpy(&vhub->vhub_qual_desc, &ast_vhub_qual_desc, + sizeof(vhub->vhub_qual_desc)); + return ret; } diff --git a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h index 87a5dea12d3c..e6a11a22422a 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/vhub.h +++ b/drivers/usb/gadget/udc/aspeed-vhub/vhub.h @@ -419,12 +419,14 @@ struct ast_vhub { /* Upstream bus speed captured at bus reset */ unsigned int speed; + u8 current_config; /* Standard USB Descriptors of the vhub. */ struct usb_device_descriptor vhub_dev_desc; struct ast_vhub_full_cdesc vhub_conf_desc; struct usb_hub_descriptor vhub_hub_desc; struct list_head vhub_str_desc; + struct usb_qualifier_descriptor vhub_qual_desc; }; /* Standard request handlers result codes */ From patchwork Fri Nov 26 11:09:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neal Liu X-Patchwork-Id: 12693750 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C0590C433EF for ; Fri, 26 Nov 2021 13:08:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; 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Fri, 26 Nov 2021 18:45:47 +0800 (GMT-8) (envelope-from neal_liu@aspeedtech.com) Received: from localhost.localdomain (192.168.10.10) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 26 Nov 2021 19:10:03 +0800 From: Neal Liu To: Felipe Balbi , Greg Kroah-Hartman , Joel Stanley , Andrew Jeffery , Cai Huoqing , Tao Ren , Julia Lawall , "kernel test robot" , Sasha Levin , , , , CC: Neal Liu , Subject: [PATCH 2/3] usb: aspeed-vhub: support remote wakeup feature Date: Fri, 26 Nov 2021 19:09:53 +0800 Message-ID: <20211126110954.2677627-3-neal_liu@aspeedtech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211126110954.2677627-1-neal_liu@aspeedtech.com> References: <20211126110954.2677627-1-neal_liu@aspeedtech.com> MIME-Version: 1.0 X-Originating-IP: [192.168.10.10] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 1AQAjlFB048316 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211126_111252_143517_22339473 X-CRM114-Status: GOOD ( 11.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Remote wakeup signaling will be automatically issued whenever any write commands has been received in suspend state. Signed-off-by: Neal Liu --- drivers/usb/gadget/udc/aspeed-vhub/core.c | 3 +++ drivers/usb/gadget/udc/aspeed-vhub/dev.c | 18 ++++++++++++++---- drivers/usb/gadget/udc/aspeed-vhub/hub.c | 22 ++++++++++++++++------ 3 files changed, 33 insertions(+), 10 deletions(-) diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c index 7a635c499777..122ee7ef0b03 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c @@ -240,6 +240,9 @@ void ast_vhub_init_hw(struct ast_vhub *vhub) if (vhub->force_usb1) ctrl |= VHUB_CTRL_FULL_SPEED_ONLY; + /* Enable auto remote wakeup */ + ctrl |= VHUB_CTRL_AUTO_REMOTE_WAKEUP; + ctrl |= VHUB_CTRL_UPSTREAM_CONNECT; writel(ctrl, vhub->regs + AST_VHUB_CTRL); diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c b/drivers/usb/gadget/udc/aspeed-vhub/dev.c index d918e8b2af3c..4462f4b73b04 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/dev.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/dev.c @@ -110,15 +110,25 @@ static int ast_vhub_dev_feature(struct ast_vhub_dev *d, u16 wIndex, u16 wValue, bool is_set) { + u32 val; + DDBG(d, "%s_FEATURE(dev val=%02x)\n", is_set ? "SET" : "CLEAR", wValue); - if (wValue != USB_DEVICE_REMOTE_WAKEUP) - return std_req_driver; + if (wValue == USB_DEVICE_REMOTE_WAKEUP) { + d->wakeup_en = is_set; + return std_req_complete; - d->wakeup_en = is_set; + } else if (wValue == USB_DEVICE_TEST_MODE) { + val = readl(d->vhub->regs + AST_VHUB_CTRL); + val &= ~GENMASK(10, 8); + val |= VHUB_CTRL_SET_TEST_MODE((wIndex >> 8) & 0x7); + writel(val, d->vhub->regs + AST_VHUB_CTRL); - return std_req_complete; + return std_req_complete; + } + + return std_req_driver; } static int ast_vhub_ep_feature(struct ast_vhub_dev *d, diff --git a/drivers/usb/gadget/udc/aspeed-vhub/hub.c b/drivers/usb/gadget/udc/aspeed-vhub/hub.c index d76f83bc7762..ac589d3ba7a2 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/hub.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/hub.c @@ -212,17 +212,27 @@ static int ast_vhub_hub_dev_feature(struct ast_vhub_ep *ep, u16 wIndex, u16 wValue, bool is_set) { + u32 val; + EPDBG(ep, "%s_FEATURE(dev val=%02x)\n", is_set ? "SET" : "CLEAR", wValue); - if (wValue != USB_DEVICE_REMOTE_WAKEUP) - return std_req_stall; + if (wValue == USB_DEVICE_REMOTE_WAKEUP) { + ep->vhub->wakeup_en = is_set; + EPDBG(ep, "Hub remote wakeup %s\n", + is_set ? "enabled" : "disabled"); + return std_req_complete; - ep->vhub->wakeup_en = is_set; - EPDBG(ep, "Hub remote wakeup %s\n", - is_set ? "enabled" : "disabled"); + } else if (wValue == USB_DEVICE_TEST_MODE) { + val = readl(ep->vhub->regs + AST_VHUB_CTRL); + val &= ~GENMASK(10, 8); + val |= VHUB_CTRL_SET_TEST_MODE((wIndex >> 8) & 0x7); + writel(val, ep->vhub->regs + AST_VHUB_CTRL); - return std_req_complete; + return std_req_complete; + } + + return std_req_stall; } static int ast_vhub_hub_ep_feature(struct ast_vhub_ep *ep, From patchwork Fri Nov 26 11:09:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neal Liu X-Patchwork-Id: 12693753 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4C4C2C4332F for ; Fri, 26 Nov 2021 13:08:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=CNWH3CQBzhORSpQXQuRwFIUii24Uqu69ZO3USyduCOw=; b=mVYP9D6p9k53o2 QwRadmLv0r1yedy4mocGIE2ivJPkd8p8zCSNlP1weEya35WjgZlpdwUNTtJ5vMmLTmph3CLQ6xRRt GaHblXOd/p9uuKF6ypyaQ7tndlb554SChTiAush/CColq+2rxDppoy80geawQ08eAgYP+pqHeVvXR 5SKMSxiIHvQ73KoUCnqno347SdyGpjKPUails4SbNzWYnI7352UsSsl8nEvHFWYz2DuZSYgi2FIen qV8NrRiaTo8U5KCpidDHM1YYdy+kyNEMllSTigjTGiMPXm1Ll8tTZHOeOTLfCdxeCeFekpHnu3l2G ZBF2l+vhbewD8TdClVSA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqawE-00AXYK-LN; Fri, 26 Nov 2021 13:06:50 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqavg-00AXM0-Tx for linux-arm-kernel@bombadil.infradead.org; Fri, 26 Nov 2021 13:06:16 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:Content-Transfer-Encoding :MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From: Sender:Reply-To:Content-ID:Content-Description; bh=6OWyuQmoFOw5/oSAPrypDY5C0uzbYKm/GFFvEAsMIto=; b=nhq+PJN/ahxORhe0o6QayfyJEn gYfsLCrlgTp5cNBmgVgLglCEr6fepPncnysnc2h0lDU6iOz9kkzZEUrMZU6jLJtRcuCV8lgrdlThR nvWGIiWLh2ZPvlzIaHguU4CD2EmOJe2tHXH/YYm686i+q5LZBYUp8ofuijQ/zlOoUKkPi/OHKrlfQ DH417X1guH/EHW7jeldgYqVbeY310u+LDvswxnHh8OTxq+CV2h3vzvsqDfqS3CP5N5RB3W9p8rH6R lHjoAclPV2X7yHl3ZBUX2NshWp9D1SGoZqtfPzLnMfpnRvwXOhUXMP2z57dzEseHpPWV+3cAEQ8C5 q/Z2vQQA==; Received: from twspam01.aspeedtech.com ([211.20.114.71]) by desiato.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqZ9v-000hUy-DM for linux-arm-kernel@lists.infradead.org; Fri, 26 Nov 2021 11:12:58 +0000 Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 1AQAjlx1048317; Fri, 26 Nov 2021 18:45:47 +0800 (GMT-8) (envelope-from neal_liu@aspeedtech.com) Received: from localhost.localdomain (192.168.10.10) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 26 Nov 2021 19:10:03 +0800 From: Neal Liu To: Felipe Balbi , Greg Kroah-Hartman , Joel Stanley , Andrew Jeffery , Cai Huoqing , Tao Ren , Julia Lawall , "kernel test robot" , Sasha Levin , , , , CC: Neal Liu , Subject: [PATCH 3/3] usb: aspeed-vhub: fix ep0 OUT ack received wrong length issue Date: Fri, 26 Nov 2021 19:09:54 +0800 Message-ID: <20211126110954.2677627-4-neal_liu@aspeedtech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211126110954.2677627-1-neal_liu@aspeedtech.com> References: <20211126110954.2677627-1-neal_liu@aspeedtech.com> MIME-Version: 1.0 X-Originating-IP: [192.168.10.10] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 1AQAjlx1048317 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211126_111252_069527_926617B3 X-CRM114-Status: UNSURE ( 8.85 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org If multiple devices in vhub are enumerated simultaneously, ep0 OUT ack might received wrong data length. Using expected data length instead. Signed-off-by: Neal Liu Acked-by: Benjamin Herrenschmidt --- drivers/usb/gadget/udc/aspeed-vhub/ep0.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c index 74ea36c19b1e..bea9cbb191a2 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/ep0.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/ep0.c @@ -251,6 +251,13 @@ static void ast_vhub_ep0_do_receive(struct ast_vhub_ep *ep, struct ast_vhub_req len = remain; rc = -EOVERFLOW; } + + /* HW return wrong data len */ + if (len < ep->ep.maxpacket && len != remain) { + EPDBG(ep, "using expected data len instead\n"); + len = remain; + } + if (len && req->req.buf) memcpy(req->req.buf + req->req.actual, ep->buf, len); req->req.actual += len;