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: 7bb318680e86 ("Bluetooth: add nokia driver")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
drivers/bluetooth/Kconfig | 8 +++++++-
drivers/bluetooth/Makefile | 2 +-
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index 8aafbed9e160..737d93ef27c5 100644
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -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
diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile
index a7f237320f4b..e693ca6eeed9 100644
--- a/drivers/bluetooth/Makefile
+++ b/drivers/bluetooth/Makefile
@@ -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
--
2.9.0
--
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