2021-10-12 20:47:41

by Randy Dunlap

Subject: [PATCH -next] ipmi: ipmb: fix dependencies to eliminate build error

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 <[email protected]>
Cc: Corey Minyard <[email protected]>
Cc: [email protected]
Cc: Arnd Bergmann <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
---
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

2021-10-12 23:12:24

by Corey Minyard

Subject: Re: [PATCH -next] ipmi: ipmb: fix dependencies to eliminate build error

On Tue, Oct 12, 2021 at 01:44:16PM -0700, Randy Dunlap wrote:
> When CONFIG_I2C=m, CONFIG_I2C_SLAVE=y (bool), and CONFIG_IPMI_IPMB=y,
> the build fails with:

Got it, thanks.

-corey

>
> 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 <[email protected]>
> Cc: Corey Minyard <[email protected]>
> Cc: [email protected]
> Cc: Arnd Bergmann <[email protected]>
> Cc: Greg Kroah-Hartman <[email protected]>
> ---
> 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