Revert "Input: appletouch - fix integer overflow issue"

[karo-tx-linux.git] / drivers / input / mouse / appletouch.c

diff --git a/drivers/input/mouse/appletouch.c b/drivers/input/mouse/appletouch.c
index 05edd75abca0e9d44300c9d59cb3e2e73099591e..a9cf768316343df7eafeda3f7c4bb58876c3f571 100644 (file)
--- a/drivers/input/mouse/appletouch.c
+++ b/drivers/input/mouse/appletouch.c
@@ -205,8 +205,8 @@ struct atp {
        bool                    overflow_warned;
        int                     x_old;          /* last reported x/y, */
        int                     y_old;          /* used for smoothing */
-       u8                      xy_cur[ATP_XSENSORS + ATP_YSENSORS];
-       u8                      xy_old[ATP_XSENSORS + ATP_YSENSORS];
+       signed char             xy_cur[ATP_XSENSORS + ATP_YSENSORS];
+       signed char             xy_old[ATP_XSENSORS + ATP_YSENSORS];
        int                     xy_acc[ATP_XSENSORS + ATP_YSENSORS];
        int                     idlecount;      /* number of empty packets */
        struct work_struct      work;
@@ -531,7 +531,7 @@ static void atp_complete_geyser_1_2(struct urb *urb)
 
        for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
                /* accumulate the change */
-               int change = dev->xy_old[i] - dev->xy_cur[i];
+               signed char change = dev->xy_old[i] - dev->xy_cur[i];
                dev->xy_acc[i] -= change;
 
                /* prevent down drifting */