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Subject[PATCH] [PATCH] Input: synaptics-rmi4 - select 'SERIO' when needed
Date
With CONFIG_SERIO=m, we get a build error for the rmi4-f03 driver,
added in linux-4.10:

warning: (HID_RMI) selects RMI4_F03 which has unmet direct dependencies (!UML && INPUT && RMI4_CORE && (SERIO=y || RMI4_CORE=SERIO))
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'

An earlier patch tried to fix this, but missed the HID_RMI driver that
does a 'select' on the F03 backend.

This adds a hidden Kconfig symbol that enforces 'serio' to be enabled
when RMI4-F03 is, which covers all cases.

Fixes: d7ddad0acc4a ("Input: synaptics-rmi4 - fix F03 build error when serio is module")
Fixes: c5e8848fc98e ("Input: synaptics-rmi4 - add support for F03")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
Sorry for dropping the ball on this earlier, I had the patch in my
randconfig tree but didn't mark it appropriately so I only stumbled
over it today when it failed to apply.
---
drivers/input/rmi4/Kconfig | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/input/rmi4/Kconfig b/drivers/input/rmi4/Kconfig
index 78a78b99ec31..fd98a17925da 100644
--- a/drivers/input/rmi4/Kconfig
+++ b/drivers/input/rmi4/Kconfig
@@ -43,13 +43,19 @@ config RMI4_SMB

config RMI4_F03
bool "RMI4 Function 03 (PS2 Guest)"
- depends on SERIO=y || RMI4_CORE=SERIO
help
Say Y here if you want to add support for RMI4 function 03.

Function 03 provides PS2 guest support for RMI4 devices. This
includes support for TrackPoints on TouchPads.

+config RMI4_F03_SERIO
+ tristate
+ depends on RMI4_CORE
+ depends on RMI4_F03
+ default RMI4_CORE
+ select SERIO
+
config RMI4_2D_SENSOR
bool

--
2.9.0
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