From: Arnd Bergmann <arnd@arndb.de> commit d7889c2020e08caab0d7e36e947f642d91015bd0 upstream. Without crc32 support, this driver fails to link: arm-linux-gnueabi-ld: drivers/usb/gadget/function/f_eem.o: in function `eem_unwrap': f_eem.c:(.text+0x11cc): undefined reference to `crc32_le' arm-linux-gnueabi-ld: drivers/usb/gadget/function/f_ncm.o:f_ncm.c:(.text+0x1e40): more undefined references to `crc32_le' follow Fixes: 6d3865f9d41f ("usb: gadget: NCM: Add transmit multi-frame.") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: stable <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20210103214224.1996535-1-arnd@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/usb/gadget/Kconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig index 31cce7805eb2..c6afc4242962 100644 --- a/drivers/usb/gadget/Kconfig +++ b/drivers/usb/gadget/Kconfig @@ -264,6 +264,7 @@ config USB_CONFIGFS_NCM depends on NET select USB_U_ETHER select USB_F_NCM + select CRC32 help NCM is an advanced protocol for Ethernet encapsulation, allows grouping of several ethernet frames into one USB transfer and @@ -313,6 +314,7 @@ config USB_CONFIGFS_EEM depends on NET select USB_U_ETHER select USB_F_EEM + select CRC32 help CDC EEM is a newer USB standard that is somewhat simpler than CDC ECM and therefore can be supported by more hardware. Technically ECM and -- 2.25.1