From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 D8A76C432C0 for ; Fri, 22 Nov 2019 10:46:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A755720637 for ; Fri, 22 Nov 2019 10:46:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574419610; bh=OQxAjtgjoRmh71w/KKY3w4GztgCDEsVjgMRHOe26tms=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Y+A0VF4+tDiPfYIQK1O0e8iEVkUAV3ieqc3Wog4fxToJXE3LIruSyLK8KeU8uR4Sh 1ekUT/ANXoQDsOFNLrRp874m3Q1PeSWHBrbeJIq3AaeBFO+etUK/HbmMmqvR+FOlS5 6Td0t95zxUrWpgM/d8XiLIB+8KnjJmhIc6Ms9y8U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729690AbfKVKqt (ORCPT ); Fri, 22 Nov 2019 05:46:49 -0500 Received: from mail.kernel.org ([198.145.29.99]:54154 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729681AbfKVKqq (ORCPT ); Fri, 22 Nov 2019 05:46:46 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D605D2071C; Fri, 22 Nov 2019 10:46:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574419606; bh=OQxAjtgjoRmh71w/KKY3w4GztgCDEsVjgMRHOe26tms=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n9R6QCPktLIEbyCYBtXRfNS9ZNSlsTy5/QldgIxCMpofzeN0kffpdg2PQW19t5O/t i5v/8U0802xTqQ8xAd/0i47orLTNWi94LbzUpSSwBqHHhwu/WTPDQ0rxrcXE8LJ+FC 4Kgsoy6zNC5OiqrMzR6djeEO7LFdaVXfG/9ned9Q= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Laurent Pinchart , Paul Elder , Kieran Bingham , Sasha Levin Subject: [PATCH 4.9 116/222] usb: gadget: uvc: Only halt video streaming endpoint in bulk mode Date: Fri, 22 Nov 2019 11:27:36 +0100 Message-Id: <20191122100911.549322410@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191122100830.874290814@linuxfoundation.org> References: <20191122100830.874290814@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Laurent Pinchart [ Upstream commit 8dbf9c7abefd5c1434a956d5c6b25e11183061a3 ] When USB requests for video data fail to be submitted, the driver signals a problem to the host by halting the video streaming endpoint. This is only valid in bulk mode, as isochronous transfers have no handshake phase and can't thus report a stall. The usb_ep_set_halt() call returns an error when using isochronous endpoints, which we happily ignore, but some UDCs complain in the kernel log. Fix this by only trying to halt the endpoint in bulk mode. Signed-off-by: Laurent Pinchart Reviewed-by: Paul Elder Tested-by: Paul Elder Reviewed-by: Kieran Bingham Signed-off-by: Sasha Levin --- drivers/usb/gadget/function/uvc_video.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index 540917f54506a..d6bab12b0b47d 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -136,7 +136,9 @@ static int uvcg_video_ep_queue(struct uvc_video *video, struct usb_request *req) ret = usb_ep_queue(video->ep, req, GFP_ATOMIC); if (ret < 0) { printk(KERN_INFO "Failed to queue request (%d).\n", ret); - usb_ep_set_halt(video->ep); + /* Isochronous endpoints can't be halted. */ + if (usb_endpoint_xfer_bulk(video->ep->desc)) + usb_ep_set_halt(video->ep); } return ret; -- 2.20.1