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

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Message-ID: <20250615183659.902110-1-rdunlap@infradead.org>
Date: Sun, 15 Jun 2025 11:36:58 -0700
From: Randy Dunlap <rdunlap@...radead.org>
To: linux-kernel@...r.kernel.org
Cc: Randy Dunlap <rdunlap@...radead.org>,
	Arnd Bergmann <arnd@...nel.org>,
	Niklas Schnelle <schnelle@...ux.ibm.com>,
	Jim Cromie <jim.cromie@...il.com>,
	Andi Shyti <andi.shyti@...nel.org>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	linux-i2c@...r.kernel.org
Subject: [PATCH] i2c: scx200_acb: add depends on HAS_IOPORT

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
---
 drivers/i2c/busses/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- lnx-616-rc1.orig/drivers/i2c/busses/Kconfig
+++ lnx-616-rc1/drivers/i2c/busses/Kconfig
@@ -1530,7 +1530,7 @@ config I2C_XGENE_SLIMPRO
 
 config SCx200_ACB
 	tristate "Geode ACCESS.bus support"
-	depends on X86_32 && PCI
+	depends on X86_32 && PCI && HAS_IOPORT
 	help
 	  Enable the use of the ACCESS.bus controllers on the Geode SCx200 and
 	  SC1100 processors and the CS5535 and CS5536 Geode companion devices.
---
base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494 # v6.16-rc1