Input: pxa930_trkball - fix write timeout handling

With a postfix decrement i reaches -1 rather than 0,
but after the loop it is tested whether it has become 0.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/input/mouse/pxa930_trkball.c b/drivers/input/mouse/pxa930_trkball.c
index a0f45c4fc198..784be69b7112 100644
--- a/drivers/input/mouse/pxa930_trkball.c
+++ b/drivers/input/mouse/pxa930_trkball.c
@@ -83,7 +83,7 @@ static int write_tbcr(struct pxa930_trkball *trkball, int v)
 
         __raw_writel(v, trkball->mmio_base + TBCR);
 
-        while (i--) {
+        while (--i) {
                 if (__raw_readl(trkball->mmio_base + TBCR) == v)
                         break;
                 msleep(1);