[PATCH] pinctrl: make pinctrl_register() return proper error code

[Lee Jones]

On Tue, 09 Jun 2015, Masahiro Yamada wrote:

> Currently, pinctrl_register() just returns NULL on error, so the
> callers can not know the exact reason of the failure.
> 
> Some of the pinctrl drivers return -EINVAL, some -ENODEV, and some
> -ENOMEM on error of pinctrl_register(), although the error code
> might be different from the real cause of the error.
> 
> This commit reworks pinctrl_register() to return the appropriate
> error code and modifies all of the pinctrl drivers to use IS_ERR()
> for the error checking and PTR_ERR() for getting the error code.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
> ---
> 
> This patch is based on linux-pinctrl/devel
> (Commit 7164873e7c69d6bab74726debc3b495a86332b1f).
> 
> I think I converted all of the pinctrl drivers, but just in case,
> I'd like the driver maintainers to check this patch out.
> 

>  drivers/pinctrl/bcm/pinctrl-bcm2835.c         |  4 ++--

Acked-by: Lee Jones <lee at kernel.org>