From nobody Mon Feb 9 16:19:56 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 7DC09C4708E for ; Tue, 6 Dec 2022 14:07:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234716AbiLFOHf (ORCPT ); Tue, 6 Dec 2022 09:07:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54340 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233987AbiLFOHa (ORCPT ); Tue, 6 Dec 2022 09:07:30 -0500 Received: from mail-ed1-x52d.google.com (mail-ed1-x52d.google.com [IPv6:2a00:1450:4864:20::52d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D4B332C136 for ; Tue, 6 Dec 2022 06:07:28 -0800 (PST) Received: by mail-ed1-x52d.google.com with SMTP id e13so20383027edj.7 for ; Tue, 06 Dec 2022 06:07:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=v922E8rGIq+J6c2NFWWh/FTpBlx2qJ3ei+I17h7c0KY=; b=i1nxMvPHlDabz6DB/ZDB4DLZ++C5eSH/pTS+6ad5I9zeCth/s4B5y9kaXF+n9bS9jA 85o8vRWo2sotVXwhqkxcaZwjmKdNJvXnJUAgKFn/nPVf6bEk8tbls7/2WdbqGR7be0ov UcuJrE5WCwUgHe6uLPl7mqIqC5J5KRgi0TBfA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=v922E8rGIq+J6c2NFWWh/FTpBlx2qJ3ei+I17h7c0KY=; b=Ag2/oiaOVM2cMFIkEOI56sKiHmXVuEDkEYeuHnYNnJUKilj0VIz5SOqInpMc6ZtZv4 2VcbNkq47qqXcGDy+b6NLw1cbXlolT3SeUxeCQdHCD7ByiZFk9kG6kB3tbzRZdpCVwRr PtgBsksGWBMPkgL+7vPLeW22+ci2iFEk0CEoWhS9LYY5LWR3wJd7MnMibwUSCK156hrv 2PP/UNZEIv3MOKXWNncMQ/jDd/qYbSdHFdf2z5CK8wEGSbIfIzgO9Yylif2o7D2updIu K6r0xCG/oMxc+WPuW36ChWQ+O1HvrHd6qDgR60pLi5C+cHr+1vAst0d51MY9pXDXkWYX f/ug== X-Gm-Message-State: ANoB5pn+gUUg4ofh/rP+Tj15iMW8YcRvZQdSIbewwcd1/h+aZqtPxmvK 9TIy21nr9qk32oyQlWiNBl5rgw== X-Google-Smtp-Source: AA0mqf7bynqfFzWNLfauj2B75UCoT+TjyhjEdSvmkFtWEAWic7P7oI1FLskZt5kFQaznTrGXPL4HCw== X-Received: by 2002:a50:c012:0:b0:46c:8a01:748e with SMTP id r18-20020a50c012000000b0046c8a01748emr10487378edb.48.1670335647228; Tue, 06 Dec 2022 06:07:27 -0800 (PST) Received: from alco.roam.corp.google.com ([2620:0:1059:10:c82e:c2a2:971e:1766]) by smtp.gmail.com with ESMTPSA id d21-20020a170906305500b007838e332d78sm7388027ejd.128.2022.12.06.06.07.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Dec 2022 06:07:26 -0800 (PST) From: Ricardo Ribalda Date: Tue, 06 Dec 2022 15:06:55 +0100 Subject: [PATCH v5 1/2] media: uvcvideo: Refactor streamon/streamoff MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20220920-resend-powersave-v5-1-692e6df6c1e2@chromium.org> References: <20220920-resend-powersave-v5-0-692e6df6c1e2@chromium.org> In-Reply-To: <20220920-resend-powersave-v5-0-692e6df6c1e2@chromium.org> To: Mauro Carvalho Chehab Cc: Guenter Roeck , Tomasz Figa , Alan Stern , linux-kernel@vger.kernel.org, Max Staudt , Sergey Senozhatsky , Yunke Cao , Ricardo Ribalda , Laurent Pinchart , Hans Verkuil , linux-media@vger.kernel.org X-Mailer: b4 0.11.0-dev-696ae X-Developer-Signature: v=1; a=openpgp-sha256; l=2194; i=ribalda@chromium.org; h=from:subject:message-id; bh=3zL21RAbBxmG4E2HOs2gfeCBQ6ad2Y/PmET8pDsI6gY=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjj0yYhBTCOiWFAyR0y9jsPMHUNKLOA8XW6o9YGKlT ZJOtYXmJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY49MmAAKCRDRN9E+zzrEiPT0EA CZDXXB1W0la3ow1s4PyTtnqRtbPpiootFJP+KJNbTQszfQa7tJHmoxC/DYQ352INFaBrqoyDf5sqGb r7jB48gVcodGQrF8jMKlLz27aVN6pACG8xewG6j+TlHeMKwP/+JrhtCZa2aHsNhvCuH/PLjMmTOvJR zQ6fOt/7ZjgVnTLh5xq9WelyLQoF3239mwEJpGP7KtIT/uyQuwODpkGRv8F1+4ifAzK4cU6kxzImHC CDTDpGo45EFSGnJv4i/s1rUUgz3Qg6IknVMD2rm+Gq+TsFAhAH9XMSMyL0IcfTWZL388AwQ00I1NYN nChutEOzQ90P9Fy53NgY8zQODuWrV00aKtrwshNgsdcIsxXIhEaKOHj4Kgw9wSLz234AW4pOmCH2IU b0AaMopzbWgnA8QjFPDTSe9Fda5hNfQKpW3bMX8LsCyEfFWWBQgOJQmzOuHkBw5yp4bHvjpZ+MISVF ckjqglMOWFmorf6cBOGIEDLmx4cEGZsK+wWd49VxcGFHAHP3G2YTQeFJEjNA5Sb3d4yjlI5qGmKHP+ GLOQKz4e06va61m1q5+gYfOdbt0xRe0HqCPcMwxStBgALlFDdN/BWp8BPApYSzNwAmyom+wT4uqZCL AnE7+kfyLZ0QVkYzMRDelr4MxcIdoxhokCPK7o+6gRMn9aCDsob0bTYrT4XA== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a new variable to handle the streaming state and handle the streamoff errors, that were not handled before. Suggested-by: Laurent Pinchart Reviewed-by: Max Staudt Signed-off-by: Ricardo Ribalda Reviewed-by: Sergey Senozhatsky --- drivers/media/usb/uvc/uvc_v4l2.c | 19 ++++++++++++++++--- drivers/media/usb/uvc/uvcvideo.h | 1 + 2 files changed, 17 insertions(+), 3 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v= 4l2.c index f4d4c33b6dfb..1389a87b8ae1 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -840,13 +840,19 @@ static int uvc_ioctl_streamon(struct file *file, void= *fh, { struct uvc_fh *handle =3D fh; struct uvc_streaming *stream =3D handle->stream; - int ret; + int ret =3D -EBUSY; =20 if (!uvc_has_privileges(handle)) return -EBUSY; =20 mutex_lock(&stream->mutex); + + if (handle->is_streaming) + goto unlock; ret =3D uvc_queue_streamon(&stream->queue, type); + handle->is_streaming =3D !ret; + +unlock: mutex_unlock(&stream->mutex); =20 return ret; @@ -857,15 +863,22 @@ static int uvc_ioctl_streamoff(struct file *file, voi= d *fh, { struct uvc_fh *handle =3D fh; struct uvc_streaming *stream =3D handle->stream; + int ret =3D 0; =20 if (!uvc_has_privileges(handle)) return -EBUSY; =20 mutex_lock(&stream->mutex); - uvc_queue_streamoff(&stream->queue, type); + + if (!handle->is_streaming) + goto unlock; + ret =3D uvc_queue_streamoff(&stream->queue, type); + handle->is_streaming =3D !!ret; + +unlock: mutex_unlock(&stream->mutex); =20 - return 0; + return ret; } =20 static int uvc_ioctl_enum_input(struct file *file, void *fh, diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvi= deo.h index df93db259312..0d9f335053b8 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -584,6 +584,7 @@ struct uvc_fh { struct uvc_video_chain *chain; struct uvc_streaming *stream; enum uvc_handle_state state; + bool is_streaming; }; =20 struct uvc_driver { --=20 2.39.0.rc0.267.gcb52ba06e7-goog-b4-0.11.0-dev-696ae