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From: Maxime Ripard <maxime@cerno.tech>
To: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Cc: linux-media@vger.kernel.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, devel@driverdev.osuosl.org,
	linux-sunxi@googlegroups.com,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Rob Herring <robh+dt@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	Yong Deng <yong.deng@magewell.com>,
	Kishon Vijay Abraham I <kishon@ti.com>,
	Vinod Koul <vkoul@kernel.org>,
	Helen Koike <helen.koike@collabora.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Hans Verkuil <hans.verkuil@cisco.com>,
	Sakari Ailus <sakari.ailus@linux.intel.com>,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Hans Verkuil <hverkuil@xs4all.nl>,
	kevin.lhopital@hotmail.com
Subject: Re: [PATCH 03/14] media: sun6i-csi: Support an optional dedicated memory pool
Date: Mon, 26 Oct 2020 16:41:04 +0100	[thread overview]
Message-ID: <20201026154104.v32up7uh6oryqxaf@gilmour.lan> (raw)
In-Reply-To: <20201023174546.504028-4-paul.kocialkowski@bootlin.com>

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On Fri, Oct 23, 2020 at 07:45:35PM +0200, Paul Kocialkowski wrote:
> This allows selecting a dedicated CMA memory pool (specified via
> device-tree) instead of the default one.
> 
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

Why would that be needed?

> ---
>  drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
> index 28e89340fed9..5d2389a5cd17 100644
> --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
> +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
> @@ -16,6 +16,7 @@
>  #include <linux/module.h>
>  #include <linux/of.h>
>  #include <linux/of_device.h>
> +#include <linux/of_reserved_mem.h>
>  #include <linux/platform_device.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/regmap.h>
> @@ -849,6 +850,12 @@ static int sun6i_csi_resource_request(struct sun6i_csi_dev *sdev,
>  		return PTR_ERR(sdev->regmap);
>  	}
>  
> +	ret = of_reserved_mem_device_init(&pdev->dev);
> +	if (ret && ret != -ENODEV) {
> +		dev_err(&pdev->dev, "Unable to init reserved memory\n");
> +		return ret;
> +	}
> +
>  	sdev->clk_mod = devm_clk_get(&pdev->dev, "mod");

If that clk_get or any subsequent function fail you'll end up leaking
whatever the initialization of the reserved memory has allocated

Maxime

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WARNING: multiple messages have this Message-ID (diff)
From: Maxime Ripard <maxime@cerno.tech>
To: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Cc: devel@driverdev.osuosl.org, devicetree@vger.kernel.org,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Kishon Vijay Abraham I <kishon@ti.com>,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Helen Koike <helen.koike@collabora.com>,
	linux-kernel@vger.kernel.org, Chen-Yu Tsai <wens@csie.org>,
	Hans Verkuil <hverkuil@xs4all.nl>,
	linux-sunxi@googlegroups.com, Rob Herring <robh+dt@kernel.org>,
	Vinod Koul <vkoul@kernel.org>, Yong Deng <yong.deng@magewell.com>,
	Sakari Ailus <sakari.ailus@linux.intel.com>,
	Hans Verkuil <hans.verkuil@cisco.com>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	kevin.lhopital@hotmail.com, linux-arm-kernel@lists.infradead.org,
	linux-media@vger.kernel.org
Subject: Re: [PATCH 03/14] media: sun6i-csi: Support an optional dedicated memory pool
Date: Mon, 26 Oct 2020 16:41:04 +0100	[thread overview]
Message-ID: <20201026154104.v32up7uh6oryqxaf@gilmour.lan> (raw)
In-Reply-To: <20201023174546.504028-4-paul.kocialkowski@bootlin.com>


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On Fri, Oct 23, 2020 at 07:45:35PM +0200, Paul Kocialkowski wrote:
> This allows selecting a dedicated CMA memory pool (specified via
> device-tree) instead of the default one.
> 
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

Why would that be needed?

> ---
>  drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
> index 28e89340fed9..5d2389a5cd17 100644
> --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
> +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
> @@ -16,6 +16,7 @@
>  #include <linux/module.h>
>  #include <linux/of.h>
>  #include <linux/of_device.h>
> +#include <linux/of_reserved_mem.h>
>  #include <linux/platform_device.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/regmap.h>
> @@ -849,6 +850,12 @@ static int sun6i_csi_resource_request(struct sun6i_csi_dev *sdev,
>  		return PTR_ERR(sdev->regmap);
>  	}
>  
> +	ret = of_reserved_mem_device_init(&pdev->dev);
> +	if (ret && ret != -ENODEV) {
> +		dev_err(&pdev->dev, "Unable to init reserved memory\n");
> +		return ret;
> +	}
> +
>  	sdev->clk_mod = devm_clk_get(&pdev->dev, "mod");

If that clk_get or any subsequent function fail you'll end up leaking
whatever the initialization of the reserved memory has allocated

Maxime

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WARNING: multiple messages have this Message-ID (diff)
From: Maxime Ripard <maxime@cerno.tech>
To: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Cc: devel@driverdev.osuosl.org, devicetree@vger.kernel.org,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Kishon Vijay Abraham I <kishon@ti.com>,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Helen Koike <helen.koike@collabora.com>,
	linux-kernel@vger.kernel.org, Chen-Yu Tsai <wens@csie.org>,
	Hans Verkuil <hverkuil@xs4all.nl>,
	linux-sunxi@googlegroups.com, Rob Herring <robh+dt@kernel.org>,
	Vinod Koul <vkoul@kernel.org>, Yong Deng <yong.deng@magewell.com>,
	Sakari Ailus <sakari.ailus@linux.intel.com>,
	Hans Verkuil <hans.verkuil@cisco.com>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	kevin.lhopital@hotmail.com, linux-arm-kernel@lists.infradead.org,
	linux-media@vger.kernel.org
Subject: Re: [PATCH 03/14] media: sun6i-csi: Support an optional dedicated memory pool
Date: Mon, 26 Oct 2020 16:41:04 +0100	[thread overview]
Message-ID: <20201026154104.v32up7uh6oryqxaf@gilmour.lan> (raw)
In-Reply-To: <20201023174546.504028-4-paul.kocialkowski@bootlin.com>


[-- Attachment #1.1: Type: text/plain, Size: 1453 bytes --]

On Fri, Oct 23, 2020 at 07:45:35PM +0200, Paul Kocialkowski wrote:
> This allows selecting a dedicated CMA memory pool (specified via
> device-tree) instead of the default one.
> 
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

Why would that be needed?

> ---
>  drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
> index 28e89340fed9..5d2389a5cd17 100644
> --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
> +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
> @@ -16,6 +16,7 @@
>  #include <linux/module.h>
>  #include <linux/of.h>
>  #include <linux/of_device.h>
> +#include <linux/of_reserved_mem.h>
>  #include <linux/platform_device.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/regmap.h>
> @@ -849,6 +850,12 @@ static int sun6i_csi_resource_request(struct sun6i_csi_dev *sdev,
>  		return PTR_ERR(sdev->regmap);
>  	}
>  
> +	ret = of_reserved_mem_device_init(&pdev->dev);
> +	if (ret && ret != -ENODEV) {
> +		dev_err(&pdev->dev, "Unable to init reserved memory\n");
> +		return ret;
> +	}
> +
>  	sdev->clk_mod = devm_clk_get(&pdev->dev, "mod");

If that clk_get or any subsequent function fail you'll end up leaking
whatever the initialization of the reserved memory has allocated

Maxime

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_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2020-10-26 15:41 UTC|newest]

Thread overview: 198+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-23 17:45 [PATCH 00/14] Allwinner MIPI CSI-2 support for A31/V3s/A83T Paul Kocialkowski
2020-10-23 17:45 ` Paul Kocialkowski
2020-10-23 17:45 ` Paul Kocialkowski
2020-10-23 17:45 ` [PATCH 01/14] phy: Distinguish between Rx and Tx for MIPI D-PHY with submodes Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 18:18   ` [linux-sunxi] " Jernej Škrabec
2020-10-23 18:18     ` Jernej Škrabec
2020-10-23 18:18     ` Jernej Škrabec
2020-10-24  8:31     ` Paul Kocialkowski
2020-10-24  8:31       ` Paul Kocialkowski
2020-10-24  8:31       ` Paul Kocialkowski
2020-10-30 22:44   ` Helen Koike
2020-10-30 22:44     ` Helen Koike
2020-10-30 22:44     ` Helen Koike
2020-10-23 17:45 ` [PATCH 02/14] phy: allwinner: phy-sun6i-mipi-dphy: Support D-PHY Rx mode for MIPI CSI-2 Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-26 15:38   ` Maxime Ripard
2020-10-26 15:38     ` Maxime Ripard
2020-10-26 15:38     ` Maxime Ripard
2020-10-27  9:23     ` Paul Kocialkowski
2020-10-27  9:23       ` Paul Kocialkowski
2020-10-27  9:23       ` Paul Kocialkowski
2020-10-27 18:28       ` Maxime Ripard
2020-10-27 18:28         ` Maxime Ripard
2020-10-27 18:28         ` Maxime Ripard
2020-11-04 10:53         ` Paul Kocialkowski
2020-11-04 10:53           ` Paul Kocialkowski
2020-11-04 10:53           ` Paul Kocialkowski
2020-10-30 22:44   ` Helen Koike
2020-10-30 22:44     ` Helen Koike
2020-10-30 22:44     ` Helen Koike
2020-11-04 10:54     ` Paul Kocialkowski
2020-11-04 10:54       ` Paul Kocialkowski
2020-11-04 10:54       ` Paul Kocialkowski
2020-10-23 17:45 ` [PATCH 03/14] media: sun6i-csi: Support an optional dedicated memory pool Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-26 15:41   ` Maxime Ripard [this message]
2020-10-26 15:41     ` Maxime Ripard
2020-10-26 15:41     ` Maxime Ripard
2020-10-27  9:26     ` Paul Kocialkowski
2020-10-27  9:26       ` Paul Kocialkowski
2020-10-27  9:26       ` Paul Kocialkowski
2020-10-23 17:45 ` [PATCH 04/14] media: sun6i-csi: Fix the image storage bpp for 10/12-bit Bayer formats Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-30 22:45   ` Helen Koike
2020-10-30 22:45     ` Helen Koike
2020-10-30 22:45     ` Helen Koike
2020-11-04 10:56     ` Paul Kocialkowski
2020-11-04 10:56       ` Paul Kocialkowski
2020-11-04 10:56       ` Paul Kocialkowski
2020-10-23 17:45 ` [PATCH 05/14] media: sun6i-csi: Only configure the interface data width for parallel Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-26 16:00   ` Maxime Ripard
2020-10-26 16:00     ` Maxime Ripard
2020-10-26 16:00     ` Maxime Ripard
2020-10-27  9:31     ` Paul Kocialkowski
2020-10-27  9:31       ` Paul Kocialkowski
2020-10-27  9:31       ` Paul Kocialkowski
2020-10-27 18:31       ` Maxime Ripard
2020-10-27 18:31         ` Maxime Ripard
2020-10-27 18:31         ` Maxime Ripard
2020-10-23 17:45 ` [PATCH 06/14] media: sun6i-csi: Support feeding from the MIPI CSI-2 controller Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45 ` [PATCH 07/14] dt-bindings: media: i2c: Add A31 MIPI CSI-2 bindings documentation Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-26 16:14   ` Maxime Ripard
2020-10-26 16:14     ` Maxime Ripard
2020-10-26 16:14     ` Maxime Ripard
2020-10-27  9:52     ` Paul Kocialkowski
2020-10-27  9:52       ` Paul Kocialkowski
2020-10-27  9:52       ` Paul Kocialkowski
2020-10-27 18:44       ` Maxime Ripard
2020-10-27 18:44         ` Maxime Ripard
2020-10-27 18:44         ` Maxime Ripard
2020-11-04 10:48         ` Paul Kocialkowski
2020-11-04 10:48           ` Paul Kocialkowski
2020-11-04 10:48           ` Paul Kocialkowski
2020-11-04 16:53           ` Maxime Ripard
2020-11-04 16:53             ` Maxime Ripard
2020-11-04 16:53             ` Maxime Ripard
2020-10-30 16:33   ` Rob Herring
2020-10-30 16:33     ` Rob Herring
2020-10-30 16:33     ` Rob Herring
2020-10-30 16:56   ` Sakari Ailus
2020-10-30 16:56     ` Sakari Ailus
2020-10-30 16:56     ` Sakari Ailus
2020-10-23 17:45 ` [PATCH 08/14] media: sunxi: Add support for the A31 MIPI CSI-2 controller Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-26  8:39   ` Dan Carpenter
2020-10-26  8:39     ` Dan Carpenter
2020-10-26  8:39     ` Dan Carpenter
2020-10-26 16:54   ` Maxime Ripard
2020-10-26 16:54     ` Maxime Ripard
2020-10-26 16:54     ` Maxime Ripard
2020-11-04 11:34     ` Paul Kocialkowski
2020-11-04 11:34       ` Paul Kocialkowski
2020-11-04 11:34       ` Paul Kocialkowski
2020-11-04 18:56       ` Maxime Ripard
2020-11-04 18:56         ` Maxime Ripard
2020-11-04 18:56         ` Maxime Ripard
2020-11-05 14:52         ` Paul Kocialkowski
2020-11-05 14:52           ` Paul Kocialkowski
2020-11-05 14:52           ` Paul Kocialkowski
2020-10-30 22:45   ` Helen Koike
2020-10-30 22:45     ` Helen Koike
2020-10-30 22:45     ` Helen Koike
2020-11-02  9:21     ` Maxime Ripard
2020-11-02  9:21       ` Maxime Ripard
2020-11-02  9:21       ` Maxime Ripard
2020-11-04 11:17       ` Paul Kocialkowski
2020-11-04 11:17         ` Paul Kocialkowski
2020-11-04 11:17         ` Paul Kocialkowski
2020-11-04 16:38         ` Helen Koike
2020-11-04 16:38           ` Helen Koike
2020-11-04 16:38           ` Helen Koike
2020-11-04 18:45           ` Maxime Ripard
2020-11-04 18:45             ` Maxime Ripard
2020-11-04 18:45             ` Maxime Ripard
2020-11-05 14:14             ` Helen Koike
2020-11-05 14:14               ` Helen Koike
2020-11-05 14:14               ` Helen Koike
2020-11-05  8:45   ` Sakari Ailus
2020-11-05  8:45     ` Sakari Ailus
2020-11-05  8:45     ` Sakari Ailus
2020-11-05 14:55     ` Paul Kocialkowski
2020-11-05 14:55       ` Paul Kocialkowski
2020-11-05 14:55       ` Paul Kocialkowski
2020-10-23 17:45 ` [PATCH 09/14] ARM: dts: sun8i: v3s: Add CSI0 camera interface node Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45 ` [PATCH 10/14] ARM: dts: sun8i: v3s: Add MIPI D-PHY and MIPI CSI-2 interface nodes Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-26 16:55   ` Maxime Ripard
2020-10-26 16:55     ` Maxime Ripard
2020-10-26 16:55     ` Maxime Ripard
2020-10-23 17:45 ` [PATCH 11/14] dt-bindings: media: i2c: Add A83T MIPI CSI-2 bindings documentation Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-26 16:56   ` Maxime Ripard
2020-10-26 16:56     ` Maxime Ripard
2020-10-26 16:56     ` Maxime Ripard
2020-11-04 10:33     ` Paul Kocialkowski
2020-11-04 10:33       ` Paul Kocialkowski
2020-11-04 10:33       ` Paul Kocialkowski
2020-11-05  8:48   ` Sakari Ailus
2020-11-05  8:48     ` Sakari Ailus
2020-11-05  8:48     ` Sakari Ailus
2020-10-23 17:45 ` [PATCH 12/14] media: sunxi: Add support for the A83T MIPI CSI-2 controller Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-26  8:53   ` Dan Carpenter
2020-10-26  8:53     ` Dan Carpenter
2020-10-26  8:53     ` Dan Carpenter
2020-10-26 17:00   ` Maxime Ripard
2020-10-26 17:00     ` Maxime Ripard
2020-10-26 17:00     ` Maxime Ripard
2020-11-04 10:37     ` Paul Kocialkowski
2020-11-04 10:37       ` Paul Kocialkowski
2020-11-04 10:37       ` Paul Kocialkowski
2020-10-23 17:45 ` [PATCH 13/14] ARM: dts: sun8i: a83t: Add MIPI CSI-2 controller node Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45 ` [PATCH 14/14] media: sunxi: sun8i-a83t-mipi-csi2: Avoid using the (unsolicited) interrupt Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-23 17:45   ` Paul Kocialkowski
2020-10-26 16:57   ` Maxime Ripard
2020-10-26 16:57     ` Maxime Ripard
2020-10-26 16:57     ` Maxime Ripard
2020-10-26 17:20 ` [PATCH 00/14] Allwinner MIPI CSI-2 support for A31/V3s/A83T Maxime Ripard
2020-10-26 17:20   ` Maxime Ripard
2020-10-26 17:20   ` Maxime Ripard
2020-10-30 22:44 ` Helen Koike
2020-10-30 22:44   ` Helen Koike
2020-10-30 22:44   ` Helen Koike
2020-11-02  9:17   ` Maxime Ripard
2020-11-02  9:17     ` Maxime Ripard
2020-11-02  9:17     ` Maxime Ripard
2020-11-04 11:11   ` Paul Kocialkowski
2020-11-04 11:11     ` Paul Kocialkowski
2020-11-04 11:11     ` Paul Kocialkowski
2020-11-04 11:14     ` Paul Kocialkowski
2020-11-04 11:14       ` Paul Kocialkowski
2020-11-04 11:14       ` Paul Kocialkowski
2020-11-04 16:36     ` Helen Koike
2020-11-04 16:36       ` Helen Koike
2020-11-04 16:36       ` Helen Koike
2020-11-05 14:58       ` Paul Kocialkowski
2020-11-05 14:58         ` Paul Kocialkowski
2020-11-05 14:58         ` Paul Kocialkowski

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