[PATCH 17/31] input: joystick: use parity32 in grip_mp.c

zhaoxiu.zeng
2016-03-27T07:13:46Z

drivers/input/joystick/grip_mp.c | 16 +---------------
1 file changed, 1 insertion(+), 15 deletions(-)

diff --git a/drivers/input/joystick/grip_mp.c b/drivers/input/joystick/grip_mp.c
index 573191d..3e29eb1 100644
--- a/drivers/input/joystick/grip_mp.c
+++ b/drivers/input/joystick/grip_mp.c
@@ -112,20 +112,6 @@ static const int axis_map[] = { 5, 9, 1, 5, 6, 10, 2, 6, 4, 8, 0, 4, 5, 9, 1, 5
static int register_slot(int i, struct grip_mp *grip);

/*
- * Returns whether an odd or even number of bits are on in pkt.
- */
-
-static int bit_parity(u32 pkt)
-{
- int x = pkt ^ (pkt >> 16);
- x ^= x >> 8;
- x ^= x >> 4;
- x ^= x >> 2;
- x ^= x >> 1;
- return x & 1;
-}
-
-/*
* Poll gameport; return true if all bits set in 'onbits' are on and
* all bits set in 'offbits' are off.
*/
@@ -235,7 +221,7 @@ static int mp_io(struct gameport* gameport, int sendflags, int sendcode, u32 *pa
pkt = (pkt >> 2) | 0xf0000000;
}

- if (bit_parity(pkt) == 1)
+ if (parity32(pkt))
return IO_RESET;

/* Acknowledge packet receipt */
--
2.5.5