linux-kernel - Re: [PATCH 5/7] i2c: Make I2C ID tables non-mandatory for DT'ed and/or ACPI'ed devices

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20140605102737.4ED08C40A4D@trevor.secretlab.ca>
Date:	Thu, 05 Jun 2014 11:27:37 +0100
From:	Grant Likely <grant.likely@...aro.org>
To:	Lee Jones <lee.jones@...aro.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	wsa@...-dreams.de, linux-i2c@...r.kernel.org,
	devicetree@...r.kernel.org, linus.walleij@...aro.org,
	Lee Jones <lee.jones@...aro.org>
Subject: Re: [PATCH 5/7] i2c: Make I2C ID tables non-mandatory for DT'ed
 and/or ACPI'ed devices

On Wed,  4 Jun 2014 13:09:54 +0100, Lee Jones <lee.jones@...aro.org> wrote:
> Currently the I2C framework insists on devices supplying an I2C ID
> table.  Many of the devices which do so unnecessarily adding quite a
> few wasted lines to kernel code.  This patch allows drivers a means
> to 'not' supply the aforementioned table and match on either DT
> and/or ACPI match tables instead.
> 
> Signed-off-by: Lee Jones <lee.jones@...aro.org>

Looks okay to me. I've not applied or tested in any way though.

Acked-by: Grant Likely <grant.likely@...aro.org>

> ---
>  drivers/i2c/i2c-core.c | 15 +++++++++++++--
>  1 file changed, 13 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
> index e8c2cba..71970da 100644
> --- a/drivers/i2c/i2c-core.c
> +++ b/drivers/i2c/i2c-core.c
> @@ -100,7 +100,7 @@ static int i2c_device_match(struct device *dev, struct device_driver *drv)
>  
>  
>  	/* Attempt an OF style match */
> -	if (of_driver_match_device(dev, drv))
> +	if (i2c_of_match_device(drv->of_match_table, dev))
>  		return 1;
>  
>  	/* Then ACPI style match */
> @@ -268,7 +268,18 @@ static int i2c_device_probe(struct device *dev)
>  		return 0;
>  
>  	driver = to_i2c_driver(dev->driver);
> -	if (!driver->probe || !driver->id_table)
> +	if (!driver->probe)
> +		return -EINVAL;
> +
> +	/*
> +	 * An I2C ID table is not mandatory, if and only if, a suitable Device
> +	 * Tree and/or ACPI match table entry is supplied for the probing
> +	 * device.
> +	 *
> +	 * TODO: Provide 'device type' to 'ACPI node' call and match here.
> +	 */
> +	if (!driver->id_table &&
> +	    !i2c_of_match_device(dev->driver->of_match_table, dev))
>  		return -ENODEV;
>  
>  	if (!device_can_wakeup(&client->dev))
> -- 
> 1.8.3.2
> 

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/