From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752238AbdFGSgB (ORCPT ); Wed, 7 Jun 2017 14:36:01 -0400 Received: from mail-pf0-f194.google.com ([209.85.192.194]:33694 "EHLO mail-pf0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752215AbdFGSf4 (ORCPT ); Wed, 7 Jun 2017 14:35:56 -0400 From: Steve Longerbeam X-Google-Original-From: Steve Longerbeam To: robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, kernel@pengutronix.de, fabio.estevam@nxp.com, linux@armlinux.org.uk, mchehab@kernel.org, hverkuil@xs4all.nl, nick@shmanahar.org, markus.heiser@darmarIT.de, p.zabel@pengutronix.de, laurent.pinchart+renesas@ideasonboard.com, bparrot@ti.com, geert@linux-m68k.org, arnd@arndb.de, sudipm.mukherjee@gmail.com, minghsiu.tsai@mediatek.com, tiffany.lin@mediatek.com, jean-christophe.trotin@st.com, horms+renesas@verge.net.au, niklas.soderlund+renesas@ragnatech.se, robert.jarzmik@free.fr, songjun.wu@microchip.com, andrew-ct.chen@mediatek.com, gregkh@linuxfoundation.org, shuah@kernel.org, sakari.ailus@linux.intel.com, pavel@ucw.cz Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org, devel@driverdev.osuosl.org, Marek Vasut Subject: [PATCH v8 33/34] media: imx: Drop warning upon multiple S_STREAM disable calls Date: Wed, 7 Jun 2017 11:34:12 -0700 Message-Id: <1496860453-6282-34-git-send-email-steve_longerbeam@mentor.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1496860453-6282-1-git-send-email-steve_longerbeam@mentor.com> References: <1496860453-6282-1-git-send-email-steve_longerbeam@mentor.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Marek Vasut Calling S_STREAM OFF multiple times on a video device is valid, although dubious, practice. Instead of warning about it and setting stream count lower than zero, just ignore the subsequent S_STREAM calls and correct the stream count to zero. Signed-off-by: Marek Vasut --- drivers/staging/media/imx/imx-ic-prp.c | 3 ++- drivers/staging/media/imx/imx-ic-prpencvf.c | 3 ++- drivers/staging/media/imx/imx-media-csi.c | 3 ++- drivers/staging/media/imx/imx-media-vdic.c | 3 ++- drivers/staging/media/imx/imx6-mipi-csi2.c | 3 ++- 5 files changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/staging/media/imx/imx-ic-prp.c b/drivers/staging/media/imx/imx-ic-prp.c index 783a515..c2bb5ef 100644 --- a/drivers/staging/media/imx/imx-ic-prp.c +++ b/drivers/staging/media/imx/imx-ic-prp.c @@ -391,7 +391,8 @@ static int prp_s_stream(struct v4l2_subdev *sd, int enable) update_count: priv->stream_count += enable ? 1 : -1; - WARN_ON(priv->stream_count < 0); + if (priv->stream_count < 0) + priv->stream_count = 0; out: mutex_unlock(&priv->lock); return ret; diff --git a/drivers/staging/media/imx/imx-ic-prpencvf.c b/drivers/staging/media/imx/imx-ic-prpencvf.c index 5e9c817..ed363fe 100644 --- a/drivers/staging/media/imx/imx-ic-prpencvf.c +++ b/drivers/staging/media/imx/imx-ic-prpencvf.c @@ -1140,7 +1140,8 @@ static int prp_s_stream(struct v4l2_subdev *sd, int enable) update_count: priv->stream_count += enable ? 1 : -1; - WARN_ON(priv->stream_count < 0); + if (priv->stream_count < 0) + priv->stream_count = 0; out: mutex_unlock(&priv->lock); return ret; diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c index c6e8d2c..c306146 100644 --- a/drivers/staging/media/imx/imx-media-csi.c +++ b/drivers/staging/media/imx/imx-media-csi.c @@ -863,7 +863,8 @@ static int csi_s_stream(struct v4l2_subdev *sd, int enable) update_count: priv->stream_count += enable ? 1 : -1; - WARN_ON(priv->stream_count < 0); + if (priv->stream_count < 0) + priv->stream_count = 0; out: mutex_unlock(&priv->lock); return ret; diff --git a/drivers/staging/media/imx/imx-media-vdic.c b/drivers/staging/media/imx/imx-media-vdic.c index c0b6d7f..7eabdc4 100644 --- a/drivers/staging/media/imx/imx-media-vdic.c +++ b/drivers/staging/media/imx/imx-media-vdic.c @@ -536,7 +536,8 @@ static int vdic_s_stream(struct v4l2_subdev *sd, int enable) update_count: priv->stream_count += enable ? 1 : -1; - WARN_ON(priv->stream_count < 0); + if (priv->stream_count < 0) + priv->stream_count = 0; out: mutex_unlock(&priv->lock); return ret; diff --git a/drivers/staging/media/imx/imx6-mipi-csi2.c b/drivers/staging/media/imx/imx6-mipi-csi2.c index cae1cb2..5061f3f 100644 --- a/drivers/staging/media/imx/imx6-mipi-csi2.c +++ b/drivers/staging/media/imx/imx6-mipi-csi2.c @@ -397,7 +397,8 @@ static int csi2_s_stream(struct v4l2_subdev *sd, int enable) update_count: csi2->stream_count += enable ? 1 : -1; - WARN_ON(csi2->stream_count < 0); + if (csi2->stream_count < 0) + csi2->stream_count = 0; out: mutex_unlock(&csi2->lock); return ret; -- 2.7.4 From mboxrd@z Thu Jan 1 00:00:00 1970 From: slongerbeam@gmail.com (Steve Longerbeam) Date: Wed, 7 Jun 2017 11:34:12 -0700 Subject: [PATCH v8 33/34] media: imx: Drop warning upon multiple S_STREAM disable calls In-Reply-To: <1496860453-6282-1-git-send-email-steve_longerbeam@mentor.com> References: <1496860453-6282-1-git-send-email-steve_longerbeam@mentor.com> Message-ID: <1496860453-6282-34-git-send-email-steve_longerbeam@mentor.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Marek Vasut Calling S_STREAM OFF multiple times on a video device is valid, although dubious, practice. Instead of warning about it and setting stream count lower than zero, just ignore the subsequent S_STREAM calls and correct the stream count to zero. Signed-off-by: Marek Vasut --- drivers/staging/media/imx/imx-ic-prp.c | 3 ++- drivers/staging/media/imx/imx-ic-prpencvf.c | 3 ++- drivers/staging/media/imx/imx-media-csi.c | 3 ++- drivers/staging/media/imx/imx-media-vdic.c | 3 ++- drivers/staging/media/imx/imx6-mipi-csi2.c | 3 ++- 5 files changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/staging/media/imx/imx-ic-prp.c b/drivers/staging/media/imx/imx-ic-prp.c index 783a515..c2bb5ef 100644 --- a/drivers/staging/media/imx/imx-ic-prp.c +++ b/drivers/staging/media/imx/imx-ic-prp.c @@ -391,7 +391,8 @@ static int prp_s_stream(struct v4l2_subdev *sd, int enable) update_count: priv->stream_count += enable ? 1 : -1; - WARN_ON(priv->stream_count < 0); + if (priv->stream_count < 0) + priv->stream_count = 0; out: mutex_unlock(&priv->lock); return ret; diff --git a/drivers/staging/media/imx/imx-ic-prpencvf.c b/drivers/staging/media/imx/imx-ic-prpencvf.c index 5e9c817..ed363fe 100644 --- a/drivers/staging/media/imx/imx-ic-prpencvf.c +++ b/drivers/staging/media/imx/imx-ic-prpencvf.c @@ -1140,7 +1140,8 @@ static int prp_s_stream(struct v4l2_subdev *sd, int enable) update_count: priv->stream_count += enable ? 1 : -1; - WARN_ON(priv->stream_count < 0); + if (priv->stream_count < 0) + priv->stream_count = 0; out: mutex_unlock(&priv->lock); return ret; diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c index c6e8d2c..c306146 100644 --- a/drivers/staging/media/imx/imx-media-csi.c +++ b/drivers/staging/media/imx/imx-media-csi.c @@ -863,7 +863,8 @@ static int csi_s_stream(struct v4l2_subdev *sd, int enable) update_count: priv->stream_count += enable ? 1 : -1; - WARN_ON(priv->stream_count < 0); + if (priv->stream_count < 0) + priv->stream_count = 0; out: mutex_unlock(&priv->lock); return ret; diff --git a/drivers/staging/media/imx/imx-media-vdic.c b/drivers/staging/media/imx/imx-media-vdic.c index c0b6d7f..7eabdc4 100644 --- a/drivers/staging/media/imx/imx-media-vdic.c +++ b/drivers/staging/media/imx/imx-media-vdic.c @@ -536,7 +536,8 @@ static int vdic_s_stream(struct v4l2_subdev *sd, int enable) update_count: priv->stream_count += enable ? 1 : -1; - WARN_ON(priv->stream_count < 0); + if (priv->stream_count < 0) + priv->stream_count = 0; out: mutex_unlock(&priv->lock); return ret; diff --git a/drivers/staging/media/imx/imx6-mipi-csi2.c b/drivers/staging/media/imx/imx6-mipi-csi2.c index cae1cb2..5061f3f 100644 --- a/drivers/staging/media/imx/imx6-mipi-csi2.c +++ b/drivers/staging/media/imx/imx6-mipi-csi2.c @@ -397,7 +397,8 @@ static int csi2_s_stream(struct v4l2_subdev *sd, int enable) update_count: csi2->stream_count += enable ? 1 : -1; - WARN_ON(csi2->stream_count < 0); + if (csi2->stream_count < 0) + csi2->stream_count = 0; out: mutex_unlock(&csi2->lock); return ret; -- 2.7.4