Module Name:	src
Committed By:	ross
Date:		Mon Mar 29 10:01:39 UTC 1999

Modified Files:
	src/sys/dev/ic: com.c
Log Message:
Mods to com_common_putc(). When doing kprintf() or kgdb output:
1. don't clear the irq unless it was clear before transmitting
2. also do various bus_space_barrier() ops
Stops console from freezing when kprintf interrupts tty driver output.