PERFORCE change 95896 for review

[Marcel Moolenaar]

http://perforce.freebsd.org/chv.cgi?CH=95896

Change 95896 by marcel at marcel_nfs on 2006/04/22 22:15:54

	Calculate the divisor before we set the DLAB bit. We can bail
	out, and would otherwise leave DLAB set. 

Affected files ...

.. //depot/projects/uart/dev/uart/uart_dev_ns8250.c#41 edit

Differences ...

==== //depot/projects/uart/dev/uart/uart_dev_ns8250.c#41 (text+ko) ====

@@ -194,11 +194,11 @@
 
 	/* Set baudrate. */
 	if (baudrate > 0) {
-		uart_setreg(bas, REG_LCR, lcr | LCR_DLAB);
-		uart_barrier(bas);
 		divisor = ns8250_divisor(bas->rclk, baudrate);
 		if (divisor == 0)
 			return (EINVAL);
+		uart_setreg(bas, REG_LCR, lcr | LCR_DLAB);
+		uart_barrier(bas);
 		uart_setdreg(bas, REG_DL, divisor);
 		uart_barrier(bas);
 	}