Signed-off-by: Martin Kepplinger <[email protected]> --- Despite it's name, sign_extend32() is safe to use for 8 and 16 bit types too.
drivers/input/tablet/gtco.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/drivers/input/tablet/gtco.c b/drivers/input/tablet/gtco.c index 8580456..272a838 100644 --- a/drivers/input/tablet/gtco.c +++ b/drivers/input/tablet/gtco.c @@ -59,7 +59,7 @@ Scott Hill [email protected] #include <asm/uaccess.h> #include <asm/unaligned.h> #include <asm/byteorder.h> - +#include <linux/bitops.h> #include <linux/usb/input.h> @@ -666,13 +666,8 @@ static void gtco_urb_callback(struct urb *urbinfo) case 4: /* Tilt */ - /* Sign extend these 7 bit numbers. */ - if (device->buffer[6] & 0x40) - device->buffer[6] |= 0x80; - - if (device->buffer[7] & 0x40) - device->buffer[7] |= 0x80; - + device->buffer[6] = sign_extend32(device->buffer[6], 6); + device->buffer[7] = sign_extend32(device->buffer[7], 6); valsigned = (device->buffer[6]); input_report_abs(inputdev, ABS_TILT_X, (s32)valsigned); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
