• Arnd Bergmann's avatar
    firmware: qemu config needs I/O ports · 28c09ec4
    Arnd Bergmann authored
    Not all machines have PCI style I/O port memory, or they do not allow
    mapping it using the ioport_map() function, whcih results in a
    build error with the newly added qemu firmware code:
    
    drivers/firmware/built-in.o: In function `fw_cfg_io_cleanup':
    qemu_fw_cfg.c:(.text+0x144): undefined reference to `ioport_unmap'
    drivers/firmware/built-in.o: In function `fw_cfg_sysfs_probe':
    qemu_fw_cfg.c:(.text+0xb18): undefined reference to `ioport_map'
    
    This adds a Kconfig dependency to ensure the driver can only
    be built on platforms that support it.
    Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    Fixes: 75f3e8e4 ("firmware: introduce sysfs driver for QEMU's fw_cfg device")
    Acked-by: default avatarGabriel Somlo <somlo@cmu.edu>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    28c09ec4
Kconfig 6.7 KB