From patchwork Mon Dec 28 12:49:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 354461 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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_RED, 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 007C0C43381 for ; Mon, 28 Dec 2020 16:00:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CE874229C4 for ; Mon, 28 Dec 2020 16:00:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387785AbgL1Ncn (ORCPT ); Mon, 28 Dec 2020 08:32:43 -0500 Received: from mail.kernel.org ([198.145.29.99]:33164 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387774AbgL1Nck (ORCPT ); Mon, 28 Dec 2020 08:32:40 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 65D0B20719; Mon, 28 Dec 2020 13:31:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609162319; bh=JXwc61ClEnUVRu79jHxcVfH8HsuaT12EiQLxO8Sd0Ls=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IQ+TukryfaNOB5d6OFylnvS3vhKANcSomdRPqVKpV/hdsuz7+WgVakBChvPC4pnD2 +DYckzhUHNtXHY1POpSiTsSCtu9+RRCt6M+nLytXDqnUY1uVbQejiRHQIBovwXTf6e ooSNRGgIlnGB0pfxUaber9Gr5Cks/F7UIHtv6D7g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sakari Ailus , Laurent Pinchart , Bingbu Cao , Andy Shevchenko , Mauro Carvalho Chehab Subject: [PATCH 4.19 263/346] media: ipu3-cio2: Serialise access to pad format Date: Mon, 28 Dec 2020 13:49:42 +0100 Message-Id: <20201228124932.477951524@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201228124919.745526410@linuxfoundation.org> References: <20201228124919.745526410@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sakari Ailus commit 55a6c6b2be3d6670bf5772364d8208bd8dc17da4 upstream. Pad format can be accessed from user space. Serialise access to it. Fixes: c2a6a07afe4a ("media: intel-ipu3: cio2: add new MIPI-CSI2 driver") Signed-off-by: Sakari Ailus Reviewed-by: Laurent Pinchart Reviewed-by: Bingbu Cao Reviewed-by: Andy Shevchenko Cc: stable@vger.kernel.org # v4.16 and up Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- drivers/media/pci/intel/ipu3/ipu3-cio2.c | 11 +++++++++++ drivers/media/pci/intel/ipu3/ipu3-cio2.h | 1 + 2 files changed, 12 insertions(+) --- a/drivers/media/pci/intel/ipu3/ipu3-cio2.c +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.c @@ -1247,11 +1247,15 @@ static int cio2_subdev_get_fmt(struct v4 { struct cio2_queue *q = container_of(sd, struct cio2_queue, subdev); + mutex_lock(&q->subdev_lock); + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) fmt->format = *v4l2_subdev_get_try_format(sd, cfg, fmt->pad); else fmt->format = q->subdev_fmt; + mutex_unlock(&q->subdev_lock); + return 0; } @@ -1275,6 +1279,8 @@ static int cio2_subdev_set_fmt(struct v4 if (fmt->pad == CIO2_PAD_SOURCE) return cio2_subdev_get_fmt(sd, cfg, fmt); + mutex_lock(&q->subdev_lock); + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = fmt->format; } else { @@ -1285,6 +1291,8 @@ static int cio2_subdev_set_fmt(struct v4 fmt->format = q->subdev_fmt; } + mutex_unlock(&q->subdev_lock); + return 0; } @@ -1532,6 +1540,7 @@ static int cio2_queue_init(struct cio2_d /* Initialize miscellaneous variables */ mutex_init(&q->lock); + mutex_init(&q->subdev_lock); /* Initialize formats to default values */ fmt = &q->subdev_fmt; @@ -1649,6 +1658,7 @@ fail_vdev_media_entity: fail_subdev_media_entity: cio2_fbpt_exit(q, &cio2->pci_dev->dev); fail_fbpt: + mutex_destroy(&q->subdev_lock); mutex_destroy(&q->lock); return r; @@ -1662,6 +1672,7 @@ static void cio2_queue_exit(struct cio2_ v4l2_device_unregister_subdev(&q->subdev); media_entity_cleanup(&q->subdev.entity); cio2_fbpt_exit(q, &cio2->pci_dev->dev); + mutex_destroy(&q->subdev_lock); mutex_destroy(&q->lock); } --- a/drivers/media/pci/intel/ipu3/ipu3-cio2.h +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.h @@ -334,6 +334,7 @@ struct cio2_queue { /* Subdev, /dev/v4l-subdevX */ struct v4l2_subdev subdev; + struct mutex subdev_lock; /* Serialise acces to subdev_fmt field */ struct media_pad subdev_pads[CIO2_PADS]; struct v4l2_mbus_framefmt subdev_fmt; atomic_t frame_sequence;