From nobody Sun Feb 8 07:55:52 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D4D3C04A95 for ; Sat, 22 Oct 2022 08:10:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233105AbiJVIIy (ORCPT ); Sat, 22 Oct 2022 04:08:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233049AbiJVIEq (ORCPT ); Sat, 22 Oct 2022 04:04:46 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D7A72C4CAF; Sat, 22 Oct 2022 00:52:18 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 213D160B6B; Sat, 22 Oct 2022 07:52:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 38774C433C1; Sat, 22 Oct 2022 07:52:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666425134; bh=PsFauO4JCKT7a/SR3XyCwaQSaNErUbHMqu5GtQzlL6k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jPJB6in5mfF9bmxMwp1WZRJb0PqdrSi1NTVGtdS1SurFueqrEbPiCIUfq22yKfcND 5qgStE1yEf9UQF+kIYJzdcEnF2BqPQ5pbYOgbhLKK51R9eKz4tlWg+8x631yWX6gWl Be1ysSfJUbJIXAbe4u5Rrqd/kjWNrtlZpbiEGvsE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yunke Cao , Ricardo Ribalda , Laurent Pinchart , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 5.19 402/717] media: uvcvideo: Use entity get_cur in uvc_ctrl_set Date: Sat, 22 Oct 2022 09:24:41 +0200 Message-Id: <20221022072515.662032461@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221022072415.034382448@linuxfoundation.org> References: <20221022072415.034382448@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Yunke Cao [ Upstream commit 5f36851c36b30f713f588ed2b60aa7b4512e2c76 ] Entity controls should get_cur using an entity-defined function instead of via a query. Fix this in uvc_ctrl_set. Fixes: 65900c581d01 ("media: uvcvideo: Allow entity-defined get_info and ge= t_cur") Signed-off-by: Yunke Cao Reviewed-by: Ricardo Ribalda Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/usb/uvc/uvc_ctrl.c | 83 ++++++++++++++++++-------------- 1 file changed, 46 insertions(+), 37 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_c= trl.c index 0e78233fc8a0..44071040d764 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -963,36 +963,56 @@ static s32 __uvc_ctrl_get_value(struct uvc_control_ma= pping *mapping, return value; } =20 -static int __uvc_ctrl_get(struct uvc_video_chain *chain, - struct uvc_control *ctrl, struct uvc_control_mapping *mapping, - s32 *value) +static int __uvc_ctrl_load_cur(struct uvc_video_chain *chain, + struct uvc_control *ctrl) { + u8 *data; int ret; =20 - if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) =3D=3D 0) - return -EACCES; + if (ctrl->loaded) + return 0; =20 - if (!ctrl->loaded) { - if (ctrl->entity->get_cur) { - ret =3D ctrl->entity->get_cur(chain->dev, - ctrl->entity, - ctrl->info.selector, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), - ctrl->info.size); - } else { - ret =3D uvc_query_ctrl(chain->dev, UVC_GET_CUR, - ctrl->entity->id, - chain->dev->intfnum, - ctrl->info.selector, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), - ctrl->info.size); - } - if (ret < 0) - return ret; + data =3D uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT); =20 + if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) =3D=3D 0) { + memset(data, 0, ctrl->info.size); ctrl->loaded =3D 1; + + return 0; } =20 + if (ctrl->entity->get_cur) + ret =3D ctrl->entity->get_cur(chain->dev, ctrl->entity, + ctrl->info.selector, data, + ctrl->info.size); + else + ret =3D uvc_query_ctrl(chain->dev, UVC_GET_CUR, + ctrl->entity->id, chain->dev->intfnum, + ctrl->info.selector, data, + ctrl->info.size); + + if (ret < 0) + return ret; + + ctrl->loaded =3D 1; + + return ret; +} + +static int __uvc_ctrl_get(struct uvc_video_chain *chain, + struct uvc_control *ctrl, + struct uvc_control_mapping *mapping, + s32 *value) +{ + int ret; + + if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) =3D=3D 0) + return -EACCES; + + ret =3D __uvc_ctrl_load_cur(chain, ctrl); + if (ret < 0) + return ret; + *value =3D __uvc_ctrl_get_value(mapping, uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT)); =20 @@ -1783,21 +1803,10 @@ int uvc_ctrl_set(struct uvc_fh *handle, * needs to be loaded from the device to perform the read-modify-write * operation. */ - if (!ctrl->loaded && (ctrl->info.size * 8) !=3D mapping->size) { - if ((ctrl->info.flags & UVC_CTRL_FLAG_GET_CUR) =3D=3D 0) { - memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), - 0, ctrl->info.size); - } else { - ret =3D uvc_query_ctrl(chain->dev, UVC_GET_CUR, - ctrl->entity->id, chain->dev->intfnum, - ctrl->info.selector, - uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), - ctrl->info.size); - if (ret < 0) - return ret; - } - - ctrl->loaded =3D 1; + if ((ctrl->info.size * 8) !=3D mapping->size) { + ret =3D __uvc_ctrl_load_cur(chain, ctrl); + if (ret < 0) + return ret; } =20 /* Backup the current value in case we need to rollback later. */ --=20 2.35.1