On 11/06/16 16:56, Jonathan Cameron wrote:
> On 07/06/16 06:23, Peter Meerwald-Stadler wrote:
>>
>>> Replace the code that guarantees the device stays in direct mode
>>> with iio_device_claim_direct_mode() which does same. This allows
>>> removal of an unused lock in the device private global data.
>>
>> Acked-by: Peter Meerwald-Stadler <pme...@pmeerw.net>
> Applied, thanks.
Backed out - see the tcs3472 comment. This lock isn't there to
protect against mode changes...
>
> Joanthan
>>
>>> Signed-off-by: Alison Schofield <amsfiel...@gmail.com>
>>> Cc: Daniel Baluta <daniel.bal...@gmail.com>
>>> ---
>>> drivers/iio/light/tcs3414.c | 12 +++++-------
>>> 1 file changed, 5 insertions(+), 7 deletions(-)
>>>
>>> diff --git a/drivers/iio/light/tcs3414.c b/drivers/iio/light/tcs3414.c
>>> index f90f8c5..8a15fb5 100644
>>> --- a/drivers/iio/light/tcs3414.c
>>> +++ b/drivers/iio/light/tcs3414.c
>>> @@ -53,7 +53,6 @@
>>>
>>> struct tcs3414_data {
>>> struct i2c_client *client;
>>> - struct mutex lock;
>>> u8 control;
>>> u8 gain;
>>> u8 timing;
>>> @@ -134,16 +133,16 @@ static int tcs3414_read_raw(struct iio_dev *indio_dev,
>>>
>>> switch (mask) {
>>> case IIO_CHAN_INFO_RAW:
>>> - if (iio_buffer_enabled(indio_dev))
>>> - return -EBUSY;
>>> - mutex_lock(&data->lock);
>>> + ret = iio_device_claim_direct_mode(indio_dev);
>>> + if (ret)
>>> + return ret;
>>> ret = tcs3414_req_data(data);
>>> if (ret < 0) {
>>> - mutex_unlock(&data->lock);
>>> + iio_device_release_direct_mode(indio_dev);
>>> return ret;
>>> }
>>> ret = i2c_smbus_read_word_data(data->client, chan->address);
>>> - mutex_unlock(&data->lock);
>>> + iio_device_release_direct_mode(indio_dev);
>>> if (ret < 0)
>>> return ret;
>>> *val = ret;
>>> @@ -288,7 +287,6 @@ static int tcs3414_probe(struct i2c_client *client,
>>> data = iio_priv(indio_dev);
>>> i2c_set_clientdata(client, indio_dev);
>>> data->client = client;
>>> - mutex_init(&data->lock);
>>>
>>> indio_dev->dev.parent = &client->dev;
>>> indio_dev->info = &tcs3414_info;
>>>
>>
>
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