| Message ID | 20180611233814.18597-1-karim.eshapa@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, 2018-06-12 at 01:38 +0200, Karim Eshapa wrote: > Use sign_extend32 kernel function instead of code duplication. > Safe also for 16 bit. Perhaps remove the bits declaration and assignments and just use 9 directly. > diff --git a/drivers/staging/iio/accel/adis16240.c b/drivers/staging/iio/accel/adis16240.c [] > @@ -292,9 +292,7 @@ static int adis16240_read_raw(struct iio_dev *indio_dev, > ret = adis_read_reg_16(st, addr, &val16); > if (ret) > return ret; > - val16 &= (1 << bits) - 1; > - val16 = (s16)(val16 << (16 - bits)) >> (16 - bits); > - *val = val16; > + *val = sign_extend32(val16, bits - 1); > return IIO_VAL_INT; > case IIO_CHAN_INFO_PEAK: > bits = 10; > @@ -302,9 +300,7 @@ static int adis16240_read_raw(struct iio_dev *indio_dev, > ret = adis_read_reg_16(st, addr, &val16); > if (ret) > return ret; > - val16 &= (1 << bits) - 1; > - val16 = (s16)(val16 << (16 - bits)) >> (16 - bits); > - *val = val16; > + *val = sign_extend32(val16, bits - 1); > return IIO_VAL_INT; > } > return -EINVAL; -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/staging/iio/accel/adis16240.c b/drivers/staging/iio/accel/adis16240.c index fff6d99089cc..9adb5badb915 100644 --- a/drivers/staging/iio/accel/adis16240.c +++ b/drivers/staging/iio/accel/adis16240.c @@ -292,9 +292,7 @@ static int adis16240_read_raw(struct iio_dev *indio_dev, ret = adis_read_reg_16(st, addr, &val16); if (ret) return ret; - val16 &= (1 << bits) - 1; - val16 = (s16)(val16 << (16 - bits)) >> (16 - bits); - *val = val16; + *val = sign_extend32(val16, bits - 1); return IIO_VAL_INT; case IIO_CHAN_INFO_PEAK: bits = 10; @@ -302,9 +300,7 @@ static int adis16240_read_raw(struct iio_dev *indio_dev, ret = adis_read_reg_16(st, addr, &val16); if (ret) return ret; - val16 &= (1 << bits) - 1; - val16 = (s16)(val16 << (16 - bits)) >> (16 - bits); - *val = val16; + *val = sign_extend32(val16, bits - 1); return IIO_VAL_INT; } return -EINVAL;
Use sign_extend32 kernel function instead of code duplication. Safe also for 16 bit. Signed-off-by: Karim Eshapa <karim.eshapa@gmail.com> --- drivers/staging/iio/accel/adis16240.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)