serial: 8250_mid: Add missing dependency

8250_mid uses rational_best_approximation() function, so the
driver needs to select CONFIG_RATIONAL option.

This fixes build error when CONFIG_RATIONAL is not enabled:

drivers/built-in.o: In function `mid8250_set_termios':
8250_mid.c:(.text+0x10169a): undefined reference to `rational_best_approximation'

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index e6f5e12..6412f14 100644 (file)
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -373,6 +373,7 @@ config SERIAL_8250_MID
        depends on SERIAL_8250 && PCI
        select HSU_DMA if SERIAL_8250_DMA
        select HSU_DMA_PCI if X86_INTEL_MID
+       select RATIONAL
        help
          Selecting this option will enable handling of the extra features
          present on the UART found on Intel Medfield SOC and various other