From patchwork Mon Jun 14 23:37:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linyu Yuan X-Patchwork-Id: 460867 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 F1CFEC2B9F4 for ; Mon, 14 Jun 2021 23:38:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C01676128B for ; Mon, 14 Jun 2021 23:38:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231671AbhFNXk1 (ORCPT ); Mon, 14 Jun 2021 19:40:27 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:24572 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231499AbhFNXk1 (ORCPT ); Mon, 14 Jun 2021 19:40:27 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1623713903; h=Content-Transfer-Encoding: MIME-Version: Message-Id: Date: Subject: Cc: To: From: Sender; bh=ibeoOv7R2fFr7c9P5sK8mLpBRVjlFyC7DS3rMGgAaIo=; b=JpfMtk3iy9bvCp/hgYOxWVOX1VxY2wsHG+cGG5yW8R0PaKgoSZea9iHzAHLaM7ZZSiJCIq+S 86fpsbGXxAIC5xOOJEFGfts+Yz29Le+BTFcfT3T5mhUZi7EyH+CamIbXaejWcMGl8c/dwhml a5rb1MwKUeL+GjrQtvHbJ9dkzAY= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyIxZTE2YSIsICJsaW51eC11c2JAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n02.prod.us-west-2.postgun.com with SMTP id 60c7e8552eaeb98b5ea92fed (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 14 Jun 2021 23:37:57 GMT Sender: linyyuan=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 452C7C4323A; Mon, 14 Jun 2021 23:37:57 +0000 (UTC) Received: from localhost.localdomain (unknown [101.87.142.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: linyyuan) by smtp.codeaurora.org (Postfix) with ESMTPSA id 7866FC433F1; Mon, 14 Jun 2021 23:37:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 7866FC433F1 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=linyyuan@codeaurora.org From: Linyu Yuan To: Felipe Balbi , Greg Kroah-Hartman , linux-usb@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Linyu Yuan Subject: [PATCH] usb: gadget: eem: fix echo command packet response issue Date: Tue, 15 Jun 2021 07:37:32 +0800 Message-Id: <20210614233732.17604-1-linyyuan@codeaurora.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Linyu Yuan when receive eem echo command, it will send a response, but queue this response to the usb request which allocate from gadget device endpoint zero, and transmit the request to IN endpoint of eem interface. on dwc3 gadget, it will trigger following warning in function __dwc3_gadget_ep_queue(), if (WARN(req->dep != dep, "request %pK belongs to '%s'\n", &req->request, req->dep->name)) return -EINVAL; fix it by allocating a usb request from IN endpoint of eem interface, and transmit the usb request to same IN endpoint of eem interface. Signed-off-by: Linyu Yuan --- v2: fix mail format and expand commit message drivers/usb/gadget/function/f_eem.c | 44 +++++++++++++++++++++++++---- 1 file changed, 39 insertions(+), 5 deletions(-) diff --git a/drivers/usb/gadget/function/f_eem.c b/drivers/usb/gadget/function/f_eem.c index 2cd9942707b4..7de355c63189 100644 --- a/drivers/usb/gadget/function/f_eem.c +++ b/drivers/usb/gadget/function/f_eem.c @@ -30,6 +30,11 @@ struct f_eem { u8 ctrl_id; }; +struct in_context { + struct sk_buff *skb; + struct usb_ep *ep; +}; + static inline struct f_eem *func_to_eem(struct usb_function *f) { return container_of(f, struct f_eem, port.func); @@ -320,9 +325,12 @@ static int eem_bind(struct usb_configuration *c, struct usb_function *f) static void eem_cmd_complete(struct usb_ep *ep, struct usb_request *req) { - struct sk_buff *skb = (struct sk_buff *)req->context; + struct in_context *ctx = req->context; - dev_kfree_skb_any(skb); + dev_kfree_skb_any(ctx->skb); + kfree(req->buf); + usb_ep_free_request(ctx->ep, req); + kfree(ctx); } /* @@ -410,7 +418,9 @@ static int eem_unwrap(struct gether *port, * b15: bmType (0 == data, 1 == command) */ if (header & BIT(15)) { - struct usb_request *req = cdev->req; + struct usb_request *req; + struct in_context *ctx; + struct usb_ep *ep; u16 bmEEMCmd; /* EEM command packet format: @@ -439,13 +449,37 @@ static int eem_unwrap(struct gether *port, skb_trim(skb2, len); put_unaligned_le16(BIT(15) | BIT(11) | len, skb_push(skb2, 2)); + + ep = port->in_ep; + req = usb_ep_alloc_request(ep, GFP_ATOMIC); + if (!req) + goto freeskb; + + ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + goto freereq; + ctx->skb = skb2; + ctx->ep = ep; + + req->buf = kmalloc(skb2->len, GFP_KERNEL); + if (!req->buf) + goto freectx; + skb_copy_bits(skb2, 0, req->buf, skb2->len); req->length = skb2->len; req->complete = eem_cmd_complete; req->zero = 1; - req->context = skb2; - if (usb_ep_queue(port->in_ep, req, GFP_ATOMIC)) + req->context = ctx; + if (usb_ep_queue(ep, req, GFP_ATOMIC)) { DBG(cdev, "echo response queue fail\n"); + kfree(req->buf); +freectx: + kfree(ctx); +freereq: + usb_ep_free_request(ep, req); +freeskb: + dev_kfree_skb_any(skb2); + } break; case 1: /* echo response */