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Bluetooth: try to improve CONFIG_SERIAL_DEV_BUS dependency 

With CONFIG_SERIAL_DEV_BUS=m, the hci_serdev.o file does not actually
get built into hci_uart.o as the Makefile doesn't pick it up, leading
to a link error with anything referring to it:

ERROR: "hci_uart_register_device" [drivers/bluetooth/hci_nokia.ko] undefined!
scripts/Makefile.modpost:91: recipe for target '__modpost' failed

Changing this in the Makefile would cause another problem when
hci_uart itself is built-in and cannot reference symbols from the
serdev module.

This tries to address both problems by introducing a new hidden
Kconfig symbol that controls both the compilation of hci_serdev.o
and whether the Nokia driver can be selected. This seems to address
the problem for me, though there might be a better way to do it.

Fixes: 7bb318680e ("Bluetooth: add nokia driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Arnd Bergmann 2017-04-19 19:50:18 +02:00 committed by Marcel Holtmann
parent f2edd9f67b
commit 1fb78fb6c6
2 changed files with 8 additions and 2 deletions
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8
drivers/bluetooth/Kconfig
View File

@ -76,6 +76,12 @@ config BT_HCIUART
Say Y here to compile support for Bluetooth UART devices into the
kernel or say M to compile it as module (hci_uart).
config BT_HCIUART_SERDEV
bool
depends on SERIAL_DEV_BUS && BT_HCIUART
depends on SERIAL_DEV_BUS=y || SERIAL_DEV_BUS=BT_HCIUART
default y
config BT_HCIUART_H4
bool "UART (H4) protocol support"
depends on BT_HCIUART
@ -89,7 +95,7 @@ config BT_HCIUART_H4
config BT_HCIUART_NOKIA
tristate "UART Nokia H4+ protocol support"
depends on BT_HCIUART
depends on SERIAL_DEV_BUS
depends on BT_HCIUART_SERDEV
depends on PM
help
Nokia H4+ is serial protocol for communication between Bluetooth

2
drivers/bluetooth/Makefile
View File

@ -31,7 +31,7 @@ btmrvl-y := btmrvl_main.o
btmrvl-$(CONFIG_DEBUG_FS) += btmrvl_debugfs.o
hci_uart-y := hci_ldisc.o
hci_uart-$(CONFIG_SERIAL_DEV_BUS) += hci_serdev.o
hci_uart-$(CONFIG_BT_HCIUART_SERDEV) += hci_serdev.o
hci_uart-$(CONFIG_BT_HCIUART_H4) += hci_h4.o
hci_uart-$(CONFIG_BT_HCIUART_BCSP) += hci_bcsp.o
hci_uart-$(CONFIG_BT_HCIUART_LL) += hci_ll.o