From patchwork Thu Dec 18 14:49:33 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ben Hutchings X-Patchwork-Id: 27569 X-Patchwork-Delegate: g.liakhovetski@gmx.de Received: from mail.tu-berlin.de ([130.149.7.33]) by www.linuxtv.org with esmtp (Exim 4.72) (envelope-from ) id 1Y1cOb-0003io-6D; Thu, 18 Dec 2014 15:49:41 +0100 X-tubIT-Incoming-IP: 209.132.180.67 Received: from vger.kernel.org ([209.132.180.67]) by mail.tu-berlin.de (exim-4.72/mailfrontend-6) with esmtp id 1Y1cOZ-0005rB-3E; Thu, 18 Dec 2014 15:49:41 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751109AbaLROth (ORCPT + 1 other); Thu, 18 Dec 2014 09:49:37 -0500 Received: from ducie-dc1.codethink.co.uk ([185.25.241.215]:52174 "EHLO ducie-dc1.codethink.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751104AbaLROtg (ORCPT ); Thu, 18 Dec 2014 09:49:36 -0500 Received: from localhost (localhost [127.0.0.1]) by ducie-dc1.codethink.co.uk (Postfix) with ESMTP id 4273046063A; Thu, 18 Dec 2014 14:49:35 +0000 (GMT) X-Virus-Scanned: Debian amavisd-new at ducie-dc1.codethink.co.uk Received: from ducie-dc1.codethink.co.uk ([127.0.0.1]) by localhost (ducie-dc1.codethink.co.uk [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id so1qUxmbZo5E; Thu, 18 Dec 2014 14:49:33 +0000 (GMT) Received: from [10.24.1.188] (xylophone.dyn.ducie.codethink.co.uk [10.24.1.188]) by ducie-dc1.codethink.co.uk (Postfix) with ESMTPSA id 36ED846011C; Thu, 18 Dec 2014 14:49:33 +0000 (GMT) Message-ID: <1418914173.22813.15.camel@xylophone.i.decadent.org.uk> Subject: [RFC PATCH 2/5] media: rcar_vin: Ensure all in-flight buffers are returned to error state before stopping. From: Ben Hutchings To: linux-media@vger.kernel.org Cc: Guennadi Liakhovetski , linux-kernel@codethink.co.uk, William Towle , Sergei Shtylyov , Hans Verkuil Date: Thu, 18 Dec 2014 14:49:33 +0000 In-Reply-To: <1418914070.22813.13.camel@xylophone.i.decadent.org.uk> References: <1418914070.22813.13.camel@xylophone.i.decadent.org.uk> Organization: Codethink Ltd. X-Mailer: Evolution 3.4.4-3 Mime-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-PMX-Version: 6.0.0.2142326, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2014.12.18.143622 X-PMX-Spam: Gauge=IIIIIIIII, Probability=9%, Report=' MULTIPLE_RCPTS 0.1, HTML_00_01 0.05, HTML_00_10 0.05, MIME_LOWER_CASE 0.05, MSGID_ADDED_BY_MTA 0.05, BODYTEXTP_SIZE_3000_LESS 0, BODY_SIZE_1500_1599 0, BODY_SIZE_2000_LESS 0, BODY_SIZE_5000_LESS 0, BODY_SIZE_7000_LESS 0, CT_TEXT_PLAIN_UTF8_CAPS 0, REFERENCES 0, URI_ENDS_IN_HTML 0, __ANY_URI 0, __CP_URI_IN_BODY 0, __CT 0, __CTE 0, __CT_TEXT_PLAIN 0, __HAS_FROM 0, __HAS_MSGID 0, __HAS_X_MAILER 0, __HAS_X_MAILING_LIST 0, __IN_REP_TO 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __MULTIPLE_RCPTS_CC_X2 0, __REFERENCES 0, __SANE_MSGID 0, __TO_MALFORMED_2 0, __TO_NO_NAME 0, __URI_NO_WWW 0, __URI_NS ' From: Ian Molton Videobuf2 complains about buffers that are still marked ACTIVE (in use by the driver) following a call to stop_streaming(). This patch returns all active buffers to state ERROR prior to stopping. Note: this introduces a (non fatal) race condition as the stream is not guaranteed to be stopped at this point. Signed-off-by: Ian Molton Signed-off-by: William Towle --- drivers/media/platform/soc_camera/rcar_vin.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c index 773de53..7069176 100644 --- a/drivers/media/platform/soc_camera/rcar_vin.c +++ b/drivers/media/platform/soc_camera/rcar_vin.c @@ -516,8 +516,14 @@ static void rcar_vin_stop_streaming(struct vb2_queue *vq) struct soc_camera_host *ici = to_soc_camera_host(icd->parent); struct rcar_vin_priv *priv = ici->priv; struct list_head *buf_head, *tmp; + int i; spin_lock_irq(&priv->lock); + + for (i = 0; i < vq->num_buffers; ++i) + if (vq->bufs[i]->state == VB2_BUF_STATE_ACTIVE) + vb2_buffer_done(vq->bufs[i], VB2_BUF_STATE_ERROR); + list_for_each_safe(buf_head, tmp, &priv->capture) list_del_init(buf_head); spin_unlock_irq(&priv->lock);