spi_s3c24xx signedness fix

On Fri, Apr 18, 2008 at 09:08:55PM +0200, Julia Lawall wrote:
> I found 63 occurrences of this problem with the following semantic match
> (http://www.emn.fr/x-info/coccinelle/):
>
> @@ unsigned int i; @@
>
> * i < 0
>

Since this one's always in the range 0-255, it could probably be made
signed, but it's just as easy to make it work unsigned.
Reported-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NMatthew Wilcox <willy@linux.intel.com>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/spi/spi_s3c24xx.c

@@ -125,10 +125,10 @@ static int s3c24xx_spi_setupxfer(struct spi_device *spi,
 	/* is clk = pclk / (2 * (pre+1)), or is it
 	 *    clk = (pclk * 2) / ( pre + 1) */
 
-	div = (div / 2) - 1;
+	div /= 2;
 
-	if (div < 0)
-		div = 1;
+	if (div > 0)
+		div -= 1;
 
 	if (div > 255)
 		div = 255;