linux-kernel - Re: [PATCH] i2c: scx200_acb: add depends on HAS

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Message-ID: <aF5v-dEVBsQGnmit@shikoro>
Date: Fri, 27 Jun 2025 12:18:33 +0200
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: Randy Dunlap <rdunlap@...radead.org>
Cc: linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...nel.org>,
	Niklas Schnelle <schnelle@...ux.ibm.com>,
	Jim Cromie <jim.cromie@...il.com>,
	Andi Shyti <andi.shyti@...nel.org>, linux-i2c@...r.kernel.org
Subject: Re: [PATCH] i2c: scx200_acb: add depends on HAS_IOPORT

On Sun, Jun 15, 2025 at 11:36:58AM -0700, Randy Dunlap wrote:
> The scx200_acb driver uses inb()/outb() without depending on HAS_IOPORT,
> which leads to build errors since kernel v6.13-rc1:
> commit 6f043e757445 ("asm-generic/io.h: Remove I/O port accessors
> for HAS_IOPORT=n")
> 
> Add the HAS_IOPORT dependency to prevent the build errors.
> 
> (Found in ARCH=um allmodconfig builds)
> 
> drivers/i2c/busses/scx200_acb.c: In function ‘scx200_acb_reset’:
> include/asm-generic/io.h:596:15: error: call to ‘_outb’ declared with attribute error: outb() requires CONFIG_HAS_IOPORT
> 
> drivers/i2c/busses/scx200_acb.c:224:26: note: in expansion of macro ‘inb’
> include/asm-generic/io.h:542:14: error: call to ‘_inb’ declared with attribute error: inb()) requires CONFIG_HAS_IOPORT
>   224 |                 status = inb(ACBST);
> 
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Cc: Arnd Bergmann <arnd@...nel.org>
> Cc: Niklas Schnelle <schnelle@...ux.ibm.com>
> Cc: Jim Cromie <jim.cromie@...il.com>
> Cc: Andi Shyti <andi.shyti@...nel.org>
> Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>
> Cc: linux-i2c@...r.kernel.org

Applied to for-current, thanks!