linux-kernel - Re: linux-next: build failure after merge of the gpio tree

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Date:   Mon, 13 Feb 2017 16:18:06 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Greg KH <greg@...ah.com>,
        "linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Alexander Stein <alexander.stein@...tec-electronic.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: linux-next: build failure after merge of the gpio tree

On Wed, Feb 8, 2017 at 6:11 AM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:

> Hi Linus,
>
> After merging the gpio tree, today's linux-next build (arm
> multi_v7_defconfig) failed like this:
>
> drivers/tty/serial/st-asc.c: In function 'asc_set_termios':
> drivers/tty/serial/st-asc.c:578:12: error: implicit declaration of function 'devm_get_gpiod_from_child' [-Werror=implicit-function-declaration]
>     gpiod = devm_get_gpiod_from_child(port->dev, "rts",
>             ^
> drivers/tty/serial/st-asc.c:578:10: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
>     gpiod = devm_get_gpiod_from_child(port->dev, "rts",
>           ^
>
> Caused by commits
>
>   a264d10ff45c ("gpiolib: Convert fwnode_get_named_gpiod() to configure GPIO")
>   b2987d7438e0 ("gpio: Pass GPIO label down to gpiod_request")
>   4b0947974e59 ("gpio: Rename devm_get_gpiod_from_child()")
>
> interacting with commit
>
>   d7356256488c ("serial: st-asc: (De)Register GPIOD and swap Pinctrl profiles")
>
> from the tty tree.

Ah what a bummer, a new user colliding with the treewide changes of these
prototypes.

> I applied the following merge fix patch (I guessed about the new arguments):

Looks correct. Well not much to do about it apart from mentioning the
problem to Linus (the big penguin) when merging the trees.

Thanks for your efforts!

Yours,
Linus Walleij