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 <narcisaanamaria12@xxxxxxxxx>
---
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 8ff537f..f8c1fb0 100644
--- a/drivers/staging/iio/accel/adis16209.c
+++ b/drivers/staging/iio/accel/adis16209.c
@@ -7,7 +7,6 @@
*/
#include <linux/delay.h>
-#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/spi/spi.h>
@@ -252,17 +251,14 @@ 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;
--
1.9.1
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