If CONFIG_INPUT=m, we get a build error for the rmi4-f03 driver,
added in linux-4.10:
drivers/input/built-in.o: In function `rmi_f03_attention':
rmi_f03.c:(.text+0xcfe0): undefined reference to `serio_interrupt'
rmi_f03.c:(.text+0xd055): undefined reference to `serio_interrupt'
drivers/input/built-in.o: In function `rmi_f03_remove':
rmi_f03.c:(.text+0xd115): undefined reference to `serio_unregister_port'
drivers/input/built-in.o: In function `rmi_f03_probe':
rmi_f03.c:(.text+0xd209): undefined reference to `__serio_register_port'
If we make the driver itself a 'tristate' instead of 'bool' symbol,
Kconfig ensures that it can only be a loadable module in this case,
which avoids the problem.
Fixes: c5e8848fc98e ("Input: synaptics-rmi4 - add support for F03")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
drivers/input/rmi4/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/input/rmi4/Kconfig b/drivers/input/rmi4/Kconfig
index 30cc627a4f45..ad945b25722c 100644
--- a/drivers/input/rmi4/Kconfig
+++ b/drivers/input/rmi4/Kconfig
@@ -40,7 +40,7 @@ config RMI4_SMB
called rmi_smbus.
config RMI4_F03
- bool "RMI4 Function 03 (PS2 Guest)"
+ tristate "RMI4 Function 03 (PS2 Guest)"
depends on RMI4_CORE && SERIO
help
Say Y here if you want to add support for RMI4 function 03.
--
2.9.0
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