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Input: mma8450 - silence some 'uninitialized variable' warnings

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Sometimes GCC is not smart enough to recognize that x, y and z are
always used properly initialized in mma8450_poll(). Let's rearrange
the code a bit to help GCC.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov 2011-10-06 15:26:50 -07:00
parent 626af86112
commit cb31f898cc
1 changed files with 10 additions and 10 deletions
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20
drivers/input/misc/mma8450.c
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@ -88,13 +88,13 @@ static int mma8450_write(struct mma8450 *m, unsigned off, u8 v)
return 0;
}
static int mma8450_read_xyz(struct mma8450 *m, int *x, int *y, int *z)
static int mma8450_read_block(struct mma8450 *m, unsigned off,
u8 *buf, size_t size)
{
struct i2c_client *c = m->client;
u8 buff[6];
int err;
err = i2c_smbus_read_i2c_block_data(c, MMA8450_OUT_X_LSB, 6, buff);
err = i2c_smbus_read_i2c_block_data(c, off, size, buf);
if (err < 0) {
dev_err(&c->dev,
"failed to read block data at 0x%02x, error %d\n",
@ -102,10 +102,6 @@ static int mma8450_read_xyz(struct mma8450 *m, int *x, int *y, int *z)
return err;
}
*x = ((buff[1] << 4) & 0xff0) | (buff[0] & 0xf);
*y = ((buff[3] << 4) & 0xff0) | (buff[2] & 0xf);
*z = ((buff[5] << 4) & 0xff0) | (buff[4] & 0xf);
return 0;
}
@ -114,7 +110,7 @@ static void mma8450_poll(struct input_polled_dev *dev)
struct mma8450 *m = dev->private;
int x, y, z;
int ret;
int err;
u8 buf[6];
ret = mma8450_read(m, MMA8450_STATUS);
if (ret < 0)
@ -123,10 +119,14 @@ static void mma8450_poll(struct input_polled_dev *dev)
if (!(ret & MMA8450_STATUS_ZXYDR))
return;
err = mma8450_read_xyz(m, &x, &y, &z);
if (err)
ret = mma8450_read_block(m, MMA8450_OUT_X_LSB, buf, sizeof(buf));
if (ret < 0)
return;
x = ((buf[1] << 4) & 0xff0) | (buf[0] & 0xf);
y = ((buf[3] << 4) & 0xff0) | (buf[2] & 0xf);
z = ((buf[5] << 4) & 0xff0) | (buf[4] & 0xf);
input_report_abs(dev->input, ABS_X, x);
input_report_abs(dev->input, ABS_Y, y);
input_report_abs(dev->input, ABS_Z, z);