[POWERPC] cpm2: Fix off-by-one error in setbrg().

The hardware adds one to the BRG value to get the divider, so it must
be subtracted by software.  Without this patch, characters will occasionally
be corrupted.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

diff --git a/arch/powerpc/sysdev/cpm2_common.c b/arch/powerpc/sysdev/cpm2_common.c
index 9244129747955d062b7a255c3797b97a23b88ab4..c827715a50907704ad1e7d4b65d7206fa9988477 100644 (file)
--- a/arch/powerpc/sysdev/cpm2_common.c
+++ b/arch/powerpc/sysdev/cpm2_common.c
@@ -102,7 +102,7 @@ cpm_setbrg(uint brg, uint rate)
                brg -= 4;
        }
        bp += brg;
-       *bp = ((BRG_UART_CLK / rate) << 1) | CPM_BRG_EN;
+       out_be32(bp, (((BRG_UART_CLK / rate) - 1) << 1) | CPM_BRG_EN);
 
        cpm2_unmap(bp);
 }