Re: [PATCH 02/14] iio: pressure: mprls0025pa: remove redundant mutex

[Marcelo Schmitt]

On 12/18, Petre Rodan wrote:
> Remove the redundant mutex since both i2c and spi transfer functions
> provide their own locking mechanism.
I don't think that is enough to safely dismiss the mutex lock. There could be
concurrent calls to mpr_read_pressure(). E.g., buffer is enabled and user issues
a single-shot read. To avoid the potential concurrent read (without using the
driver mutex), do iio_device_claim_direct() before calling mpr_read_pressure()
in the IIO_CHAN_INFO_RAW case.