Hi Wei, On Thu, 20 May 2021 at 15:32, Wei Yongjun <weiyongjun1@xxxxxxxxxx> wrote: > > Fix build error when CONFIG_WWAN_CORE is not set: > > x86_64-linux-gnu-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_disconnect': > cdc-wdm.c:(.text+0xb2a): undefined reference to `wwan_remove_port' > x86_64-linux-gnu-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_in_callback': > cdc-wdm.c:(.text+0xf23): undefined reference to `wwan_port_rx' > x86_64-linux-gnu-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_wwan_port_stop': > cdc-wdm.c:(.text+0x127d): undefined reference to `wwan_port_get_drvdata' > x86_64-linux-gnu-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_wwan_port_tx': > cdc-wdm.c:(.text+0x12d9): undefined reference to `wwan_port_get_drvdata' > x86_64-linux-gnu-ld: cdc-wdm.c:(.text+0x13c1): undefined reference to `wwan_port_txoff' > x86_64-linux-gnu-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_wwan_port_start': > cdc-wdm.c:(.text+0x13e0): undefined reference to `wwan_port_get_drvdata' > x86_64-linux-gnu-ld: cdc-wdm.c:(.text+0x1431): undefined reference to `wwan_port_txon' > x86_64-linux-gnu-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_wwan_port_tx_complete': > cdc-wdm.c:(.text+0x14a4): undefined reference to `wwan_port_txon' > x86_64-linux-gnu-ld: drivers/usb/class/cdc-wdm.o: in function `wdm_create.cold': > cdc-wdm.c:(.text.unlikely+0x209): undefined reference to `wwan_create_port' > > Fixes: cac6fb015f71 ("usb: class: cdc-wdm: WWAN framework integration") > Reported-by: Hulk Robot <hulkci@xxxxxxxxxx> > Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx> > --- > drivers/usb/class/Kconfig | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/usb/class/Kconfig b/drivers/usb/class/Kconfig > index d3f5162bd67e..7e502c046031 100644 > --- a/drivers/usb/class/Kconfig > +++ b/drivers/usb/class/Kconfig > @@ -30,6 +30,7 @@ config USB_PRINTER > > config USB_WDM > tristate "USB Wireless Device Management support" > + depends on WWAN_CORE > help > This driver supports the WMC Device Management functionality > of cell phones compliant to the CDC WMC specification. You can use Thanks for fixing this. Some *optional* code in cdc-wdm.c is flagged with CONFIG_WWAN instead of CONFIG_WWAN_CORE. would it be possible to change that flags in the code instead of adding a dependency? Regards, Loic