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Revert "Input: appletouch - fix integer overflow issue" 

This reverts commit 04b4b88cca.

While the original problem only caused a slight disturbance on the
edge of the touchpad, the commit above to "fix" it completely breaks
operation on some other models such as mine.

We'll sort this out separately, revert the patch for now.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2010-08-09 13:48:08 +10:00
parent 8b449d1f13
commit 6e49c1a407
1 changed files with 3 additions and 3 deletions
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6
drivers/input/mouse/appletouch.c
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@ -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 */