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From: Peng Fan <peng.fan@nxp.com>
To: Leonard Crestez <leonard.crestez@nxp.com>,
	Stephen Boyd <sboyd@kernel.org>, Shawn Guo <shawnguo@kernel.org>
Cc: Michael Turquette <mturquette@baylibre.com>,
	Jacky Bai <ping.bai@nxp.com>, Anson Huang <anson.huang@nxp.com>,
	Abel Vesa <abel.vesa@nxp.com>,
	Aisheng Dong <aisheng.dong@nxp.com>,
	Fabio Estevam <fabio.estevam@nxp.com>,
	"linux-clk@vger.kernel.org" <linux-clk@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	dl-linux-imx <linux-imx@nxp.com>,
	"kernel@pengutronix.de" <kernel@pengutronix.de>
Subject: RE: [PATCH] clk: imx8m: Suppress bind attrs
Date: Tue, 19 Nov 2019 09:11:01 +0000	[thread overview]
Message-ID: <AM0PR04MB448144625FD1BE6177E35B55884C0@AM0PR04MB4481.eurprd04.prod.outlook.com> (raw)
In-Reply-To: <9f2ac65bab203a943de947465d6534980585e144.1574116045.git.leonard.crestez@nxp.com>

> Subject: [PATCH] clk: imx8m: Suppress bind attrs
> 
> The clock drivers on imx8m series are registered as platform devices and this
> opens the possibility of reloading the driver at runtime:
> 
> This doesn't actually work: clocks are never removed and attempting to bind
> again results in registration errors and a crash.
> 
> Fix this by explicitly suppressing bind attrs like several other drivers.
> 
> Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>

Reviewed-by: Peng Fan <peng.fan@nxp.com>

> 
> ---
> No cc: stable because because there are likely many other opportunities to
> crash the system by echoing random stuff in sysfs as root.
> 
>  drivers/clk/imx/clk-imx8mm.c | 1 +
>  drivers/clk/imx/clk-imx8mn.c | 1 +
>  drivers/clk/imx/clk-imx8mq.c | 1 +
>  3 files changed, 3 insertions(+)
> 
> diff --git a/drivers/clk/imx/clk-imx8mm.c b/drivers/clk/imx/clk-imx8mm.c
> index 9246e89bb5fd..3cb75ad4270d 100644
> --- a/drivers/clk/imx/clk-imx8mm.c
> +++ b/drivers/clk/imx/clk-imx8mm.c
> @@ -619,9 +619,10 @@ MODULE_DEVICE_TABLE(of,
> imx8mm_clk_of_match);
> 
>  static struct platform_driver imx8mm_clk_driver = {
>  	.probe = imx8mm_clocks_probe,
>  	.driver = {
>  		.name = "imx8mm-ccm",
> +		.suppress_bind_attrs = true,
>  		.of_match_table = of_match_ptr(imx8mm_clk_of_match),
>  	},
>  };
>  module_platform_driver(imx8mm_clk_driver);
> diff --git a/drivers/clk/imx/clk-imx8mn.c b/drivers/clk/imx/clk-imx8mn.c
> index 4749beab9fc8..d16530430ac2 100644
> --- a/drivers/clk/imx/clk-imx8mn.c
> +++ b/drivers/clk/imx/clk-imx8mn.c
> @@ -576,9 +576,10 @@ MODULE_DEVICE_TABLE(of,
> imx8mn_clk_of_match);
> 
>  static struct platform_driver imx8mn_clk_driver = {
>  	.probe = imx8mn_clocks_probe,
>  	.driver = {
>  		.name = "imx8mn-ccm",
> +		.suppress_bind_attrs = true,
>  		.of_match_table = of_match_ptr(imx8mn_clk_of_match),
>  	},
>  };
>  module_platform_driver(imx8mn_clk_driver);
> diff --git a/drivers/clk/imx/clk-imx8mq.c b/drivers/clk/imx/clk-imx8mq.c
> index c8ab86fcba7c..0e0f69e881bd 100644
> --- a/drivers/clk/imx/clk-imx8mq.c
> +++ b/drivers/clk/imx/clk-imx8mq.c
> @@ -611,9 +611,10 @@ MODULE_DEVICE_TABLE(of,
> imx8mq_clk_of_match);
> 
>  static struct platform_driver imx8mq_clk_driver = {
>  	.probe = imx8mq_clocks_probe,
>  	.driver = {
>  		.name = "imx8mq-ccm",
> +		.suppress_bind_attrs = true,
>  		.of_match_table = of_match_ptr(imx8mq_clk_of_match),
>  	},
>  };
>  module_platform_driver(imx8mq_clk_driver);
> --
> 2.17.1


  parent reply	other threads:[~2019-11-19  9:11 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-18 22:28 [PATCH] clk: imx8m: Suppress bind attrs Leonard Crestez
2019-11-19  7:09 ` Uwe Kleine-König
2019-11-19 14:23   ` Leonard Crestez
2019-11-19 15:06     ` Uwe Kleine-König
2019-11-19  9:11 ` Peng Fan [this message]
2019-11-21 13:52 Leonard Crestez
2019-12-09  2:36 ` Shawn Guo

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