When CONFIG_I2C=m, CONFIG_I2C_SLAVE=y (bool), and CONFIG_IPMI_IPMB=y,
the build fails with:
ld: drivers/char/ipmi/ipmi_ipmb.o: in function `ipmi_ipmb_remove':
ipmi_ipmb.c:(.text+0x6b): undefined reference to `i2c_slave_unregister'
ld: drivers/char/ipmi/ipmi_ipmb.o: in function `ipmi_ipmb_thread':
ipmi_ipmb.c:(.text+0x2a4): undefined reference to `i2c_transfer'
ld: drivers/char/ipmi/ipmi_ipmb.o: in function `ipmi_ipmb_probe':
ipmi_ipmb.c:(.text+0x646): undefined reference to `i2c_slave_register'
ld: drivers/char/ipmi/ipmi_ipmb.o: in function `ipmi_ipmb_driver_init':
ipmi_ipmb.c:(.init.text+0xa): undefined reference to `i2c_register_driver'
ld: drivers/char/ipmi/ipmi_ipmb.o: in function `ipmi_ipmb_driver_exit':
ipmi_ipmb.c:(.exit.text+0x8): undefined reference to `i2c_del_driver'
This is due to having a tristate depending on a bool symbol.
By adding I2C (tristate) as a dependency, the desired dependencies
are met, causing IPMI_IPMB to be changed from =y to =m:
-CONFIG_IPMI_IPMB=y
+CONFIG_IPMI_IPMB=m
Fixes: 63c4eb347164 ("ipmi:ipmb: Add initial support for IPMI over IPMB")
Signed-off-by: Randy Dunlap <rdun...@infradead.org>
Cc: Corey Minyard <miny...@acm.org>
Cc: openipmi-developer@lists.sourceforge.net
Cc: Arnd Bergmann <a...@arndb.de>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/char/ipmi/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-next-20211012.orig/drivers/char/ipmi/Kconfig
+++ linux-next-20211012/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
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