serial: SERIAL_8250_RUNTIME_UARTS must be <= SERIAL_8250_NR_UARTS

[David Vrabel <dvrabel@arcom.com>]

If SERIAL_8250_RUNTIME_UARTS is > SERIAL_8250_NR_UARTS then more serial
ports are registered than we've allocated memory for.  Prevent this by
limiting SERIAL_8250_RUNTIME_UARTS in the serial Kconfig.

Signed-off-by: David Vrabel <dvrabel@arcom.com>
-- 
David Vrabel, Design Engineer

Arcom, Clifton Road           Tel: +44 (0)1223 411200 ext. 3233
Cambridge CB1 7EA, UK         Web: http://www.arcom.com/

Index: linux-2.6-working/drivers/serial/Kconfig
===================================================================
--- linux-2.6-working.orig/drivers/serial/Kconfig	2006-02-03 14:22:05.000000000 +0000
+++ linux-2.6-working/drivers/serial/Kconfig	2006-02-06 10:17:52.000000000 +0000
@@ -98,6 +98,7 @@
 config SERIAL_8250_RUNTIME_UARTS
 	int "Number of 8250/16550 serial ports to register at runtime"
 	depends on SERIAL_8250
+	range 0 SERIAL_8250_NR_UARTS
 	default "4"
 	help
 	  Set this to the maximum number of serial ports you want
@@ -105,6 +106,9 @@
 	  with the module parameter "nr_uarts", or boot-time parameter
 	  8250.nr_uarts
 
+	  This must be less than or equal to the maximum number of 8250/16550
+	  serial ports supported (SERIAL_8250_NR_UARTS).
+
 config SERIAL_8250_EXTENDED
 	bool "Extended 8250/16550 serial driver options"
 	depends on SERIAL_8250