linux-kernel - [PATCH] ipmi: ipmb: add CONFIG

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Date:   Wed, 13 Oct 2021 16:36:53 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Corey Minyard <minyard@....org>,
        Andrew Manley <andrew.manley@...lingtech.com>
Cc:     Arnd Bergmann <arnd@...db.de>, Zev Weiss <zweiss@...inix.com>,
        Andrew Jeffery <andrew@...id.au>,
        openipmi-developer@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: [PATCH] ipmi: ipmb: add CONFIG_I2C dependency

From: Arnd Bergmann <arnd@...db.de>

When CONFIG_I2C is a loadable module, the slave interface is not
available to built-in drivers:

x86_64-linux-ld: drivers/char/ipmi/ipmi_ipmb.o: in function `ipmi_ipmb_remove':
ipmi_ipmb.c:(.text+0x37): undefined reference to `i2c_slave_unregister'
x86_64-linux-ld: drivers/char/ipmi/ipmi_ipmb.o: in function `ipmi_ipmb_thread':
ipmi_ipmb.c:(.text+0x284): undefined reference to `i2c_transfer'

Add another dependency to the ipmb backend to avoid this.

Fixes: 63c4eb347164 ("ipmi:ipmb: Add initial support for IPMI over IPMB")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/char/ipmi/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/char/ipmi/Kconfig b/drivers/char/ipmi/Kconfig
index ace882ed3d55..b061e6b513ed 100644
--- a/drivers/char/ipmi/Kconfig
+++ b/drivers/char/ipmi/Kconfig
@@ -77,7 +77,7 @@ config IPMI_SSIF
 
 config IPMI_IPMB
 	tristate 'IPMI IPMB interface'
-	depends on I2C_SLAVE
+	depends on I2C && I2C_SLAVE
 	help
 	  Provides a driver for a system running right on the IPMB bus.
 	  It supports normal system interface messages to a BMC on the IPMB
-- 
2.29.2