Hi Arnd,
> The linkage between the bluetooth driver and the wireless
> driver is not defined properly, leading to build problems
> such as:
>
> warning: (BT_HCIRSI) selects RSI_COEX which has unmet direct dependencies (NETDEVICES && WLAN && WLAN_VENDOR_RSI && BT_HCIRSI && RSI_91X)
> drivers/net/wireless/rsi/rsi_91x_main.o: In function `rsi_read_pkt':
> (.text+0x205): undefined reference to `rsi_bt_ops'
>
> To actually make it work, we need the following steps:
>
> - remove the bogus 'select RSI_COEX', this is already covered
> by the default
> - change RSI_COEX to a 'bool' symbol so that the #ifdefs work
> all the time
> - ensure that BT_HCIRSI is built-in whenever RSI_91X is built-in
> - prevent BT_HCIRSI from being enabled when CONFIG_BT=m and
> RSI_91X=y, as this cannot work
>
> Fixes: 38aa4da50483 ("Bluetooth: btrsi: add new rsi bluetooth driver")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> drivers/bluetooth/Kconfig | 9 ++++++++-
> drivers/bluetooth/Makefile | 2 +-
> drivers/net/wireless/rsi/Kconfig | 6 +-----
> 3 files changed, 10 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
> index d8bbd661dbdb..6b3e8bf69d07 100644
> --- a/drivers/bluetooth/Kconfig
> +++ b/drivers/bluetooth/Kconfig
> @@ -394,8 +394,9 @@ config BT_QCOMSMD
>
> config BT_HCIRSI
> tristate "Redpine HCI support"
> + depends on RSI_91X
> + depends on !(BT=m && RSI_91X=y)
> default n
> - select RSI_COEX
> help
> Redpine BT driver.
> This driver handles BT traffic from upper layers and pass
> @@ -404,4 +405,10 @@ config BT_HCIRSI
> Say Y here to compile support for HCI over Redpine into the
> kernel or say M to compile as a module.
>
> +config BT_HCIRSI_MODULE
> + tristate
> + # ensure that the BT_HCIRSI driver is visible to the core
> + default y if BT_HCIRSI=m && RSI_91X=y
> + default BT_HCIRSI
> +
> endmenu
> diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile
> index 03cfc1b20c4a..9e8d22712ff3 100644
> --- a/drivers/bluetooth/Makefile
> +++ b/drivers/bluetooth/Makefile
> @@ -28,7 +28,7 @@ obj-$(CONFIG_BT_QCA) += btqca.o
>
> obj-$(CONFIG_BT_HCIUART_NOKIA) += hci_nokia.o
>
> -obj-$(CONFIG_BT_HCIRSI) += btrsi.o
> +obj-$(CONFIG_BT_HCIRSI_MODULE) += btrsi.o
do we need this new option? I have avoided these kind of complex things multi config entries. Can we not just select the RSI_91X?
Regards
Marcel
