From ae81abcb6a490aff04091aed59baf1c290cc657e Mon Sep 17 00:00:00 2001 From: Narcisa Ana Maria Vasile Date: Wed, 15 Mar 2017 19:00:14 +0200 Subject: [PATCH] staging: iio: adis16209: Remove mutex_lock() and mutex_unlock() calls The function adis16209_read_raw() is safe to be run in parallel. The call to adis_read_reg_16() is safe since adis_read_reg() uses the txrx_lock from struct adis to protect simultaneous changes. Remove mutex.h inclusion since it is no longer needed. Signed-off-by: Narcisa Ana Maria Vasile Signed-off-by: Jonathan Cameron --- drivers/staging/iio/accel/adis16209.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/staging/iio/accel/adis16209.c b/drivers/staging/iio/accel/adis16209.c index 28705bf..52fa2e0 100644 --- a/drivers/staging/iio/accel/adis16209.c +++ b/drivers/staging/iio/accel/adis16209.c @@ -7,7 +7,6 @@ */ #include -#include #include #include #include @@ -254,17 +253,14 @@ static int adis16209_read_raw(struct iio_dev *indio_dev, default: return -EINVAL; } - mutex_lock(&indio_dev->mlock); addr = adis16209_addresses[chan->scan_index][0]; ret = adis_read_reg_16(st, addr, &val16); if (ret) { - mutex_unlock(&indio_dev->mlock); return ret; } val16 &= (1 << bits) - 1; val16 = (s16)(val16 << (16 - bits)) >> (16 - bits); *val = val16; - mutex_unlock(&indio_dev->mlock); return IIO_VAL_INT; } return -EINVAL; -- 2.7.4