From patchwork Sat Aug 29 05:58:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 258732 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=-12.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, 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 50F25C433E7 for ; Sat, 29 Aug 2020 05:59:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2756020BED for ; Sat, 29 Aug 2020 05:59:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="iFA+btGd" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726929AbgH2F71 (ORCPT ); Sat, 29 Aug 2020 01:59:27 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:50509 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726814AbgH2F7Z (ORCPT ); Sat, 29 Aug 2020 01:59:25 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1598680764; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=JBxLm8OMFKHoxpqehjgR8wTIrJyvPsHzMv6BSVJcvNw=; b=iFA+btGdHoPfDg8UlKEDDr0eesMVHfFeVNEcQfpmMvEfIIIIC6QMG3tY8JiM9WaJKQgXazYl HbnlEeTzsgSzjycovwBt8XHs/Kayo8bFFeR/Qim6BPerlnixm/f3vG03DoxDi5Gd/gAxmZD5 fh7qElGb988wMImma+oXPeKBuuM= 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-n03.prod.us-west-2.postgun.com with SMTP id 5f49ee9d6a801be9b26ca310 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Sat, 29 Aug 2020 05:58:53 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 9780EC43391; Sat, 29 Aug 2020 05:58:53 +0000 (UTC) Received: from wcheng-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: wcheng) by smtp.codeaurora.org (Postfix) with ESMTPSA id D17CBC43387; Sat, 29 Aug 2020 05:58:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org D17CBC43387 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=none smtp.mailfrom=wcheng@codeaurora.org From: Wesley Cheng To: robh+dt@kernel.org, bjorn.andersson@linaro.org, balbi@kernel.org, gregkh@linuxfoundation.org, agross@kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-usb@vger.kernel.org, jackp@codeaurora.org, Wesley Cheng Subject: [RFC v5 4/6] usb: gadget: configfs: Check USB configuration before adding Date: Fri, 28 Aug 2020 22:58:44 -0700 Message-Id: <20200829055846.19034-5-wcheng@codeaurora.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200829055846.19034-1-wcheng@codeaurora.org> References: <20200829055846.19034-1-wcheng@codeaurora.org> MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Ensure that the USB gadget is able to support the configuration being added based on the number of endpoints required from all interfaces. This is for accounting for any bandwidth or space limitations. Signed-off-by: Wesley Cheng --- drivers/usb/gadget/configfs.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index 56051bb97349..7c74c04b1d8c 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -1361,6 +1361,7 @@ static int configfs_composite_bind(struct usb_gadget *gadget, struct usb_function *f; struct usb_function *tmp; struct gadget_config_name *cn; + unsigned long ep_map = 0; if (gadget_is_otg(gadget)) c->descriptors = otg_desc; @@ -1390,7 +1391,28 @@ static int configfs_composite_bind(struct usb_gadget *gadget, list_add(&f->list, &cfg->func_list); goto err_purge_funcs; } + if (f->ss_descriptors) { + struct usb_descriptor_header **d; + + d = f->ss_descriptors; + for (; *d; ++d) { + struct usb_endpoint_descriptor *ep; + int addr; + + if ((*d)->bDescriptorType != USB_DT_ENDPOINT) + continue; + + ep = (struct usb_endpoint_descriptor *)*d; + addr = ((ep->bEndpointAddress & 0x80) >> 3) | + (ep->bEndpointAddress & 0x0f); + set_bit(addr, &ep_map); + } + } } + ret = usb_gadget_check_config(cdev->gadget, ep_map); + if (ret) + goto err_purge_funcs; + usb_ep_autoconfig_reset(cdev->gadget); } if (cdev->use_os_string) {