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    Subject[PATCH 17/31] input: joystick: use parity32 in grip_mp.c
    From
    Date
    From: Zeng Zhaoxiu <zhaoxiu.zeng@gmail.com>

    Signed-off-by: Zeng Zhaoxiu <zhaoxiu.zeng@gmail.com>
    ---
    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
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