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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,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 CF6DDC4332E for ; Mon, 1 Mar 2021 18:49:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9E46464DA3 for ; Mon, 1 Mar 2021 18:49:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240563AbhCASsO (ORCPT ); Mon, 1 Mar 2021 13:48:14 -0500 Received: from mail.kernel.org ([198.145.29.99]:46442 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235083AbhCAQnC (ORCPT ); Mon, 1 Mar 2021 11:43:02 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9F12464EED; Mon, 1 Mar 2021 16:29:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614616170; bh=iTx3XB6XDAxQbf/VV9LMH5cUp36i7ylT2THMU9dESik=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kkHiUyOCn5rrX6/AD6NJmvyGMbQaerB+SdCOIqwH8cGMywnYUPBNpgmGkDHns2hd7 zBxOqCLsh9dhw2YdxHIGJJx6Ba4XdEYcCbqordduSHsFksVOga8pfGto36Xb9cZEbq seWScIpkcIBpanO1azMg2WvjvHQsRQrfIS9/BBXc= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Till=20D=C3=B6rges?= , Laurent Pinchart , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 4.14 057/176] media: uvcvideo: Accept invalid bFormatIndex and bFrameIndex values Date: Mon, 1 Mar 2021 17:12:10 +0100 Message-Id: <20210301161023.778956270@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161020.931630716@linuxfoundation.org> References: <20210301161020.931630716@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Laurent Pinchart [ Upstream commit dc9455ffae02d7b7fb51ba1e007fffcb9dc5d890 ] The Renkforce RF AC4K 300 Action Cam 4K reports invalid bFormatIndex and bFrameIndex values when negotiating the video probe and commit controls. The UVC descriptors report a single supported format and frame size, with bFormatIndex and bFrameIndex both equal to 2, but the video probe and commit controls report bFormatIndex and bFrameIndex set to 1. The device otherwise operates correctly, but the driver rejects the values and fails the format try operation. Fix it by ignoring the invalid indices, and assuming that the format and frame requested by the driver are accepted by the device. Link: https://bugzilla.kernel.org/show_bug.cgi?id=210767 Fixes: 8a652a17e3c0 ("media: uvcvideo: Ensure all probed info is returned to v4l2") Reported-by: Till Dörges Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/usb/uvc/uvc_v4l2.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index 644afd55c0f0f..08a3a8ad79d75 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -253,7 +253,9 @@ static int uvc_v4l2_try_format(struct uvc_streaming *stream, goto done; /* After the probe, update fmt with the values returned from - * negotiation with the device. + * negotiation with the device. Some devices return invalid bFormatIndex + * and bFrameIndex values, in which case we can only assume they have + * accepted the requested format as-is. */ for (i = 0; i < stream->nformats; ++i) { if (probe->bFormatIndex == stream->format[i].index) { @@ -262,11 +264,10 @@ static int uvc_v4l2_try_format(struct uvc_streaming *stream, } } - if (i == stream->nformats) { - uvc_trace(UVC_TRACE_FORMAT, "Unknown bFormatIndex %u\n", + if (i == stream->nformats) + uvc_trace(UVC_TRACE_FORMAT, + "Unknown bFormatIndex %u, using default\n", probe->bFormatIndex); - return -EINVAL; - } for (i = 0; i < format->nframes; ++i) { if (probe->bFrameIndex == format->frame[i].bFrameIndex) { @@ -275,11 +276,10 @@ static int uvc_v4l2_try_format(struct uvc_streaming *stream, } } - if (i == format->nframes) { - uvc_trace(UVC_TRACE_FORMAT, "Unknown bFrameIndex %u\n", + if (i == format->nframes) + uvc_trace(UVC_TRACE_FORMAT, + "Unknown bFrameIndex %u, using default\n", probe->bFrameIndex); - return -EINVAL; - } fmt->fmt.pix.width = frame->wWidth; fmt->fmt.pix.height = frame->wHeight; -- 2.27.0