diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-13 15:35:56 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-13 15:35:56 -0700 |
| commit | 589e1d10ff27c61669cc74a43620e6e769ea79dd (patch) | |
| tree | 63c23b1407944f136b44949c7b03da74823ae757 /drivers/iio/light/tcs3472.c | |
| parent | db7c17ecbf4d6328597047c4e4d6e8914945477c (diff) | |
| parent | 1795cd9b3a91d4b5473c97f491d63892442212ab (diff) | |
Merge 3.16-rc5 into staging-next
We want the fixes in -rc5 in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iio/light/tcs3472.c')
| -rw-r--r-- | drivers/iio/light/tcs3472.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/iio/light/tcs3472.c b/drivers/iio/light/tcs3472.c index fe063a0a21cd..752569985d1d 100644 --- a/drivers/iio/light/tcs3472.c +++ b/drivers/iio/light/tcs3472.c @@ -52,6 +52,7 @@ struct tcs3472_data { struct i2c_client *client; + struct mutex lock; u8 enable; u8 control; u8 atime; @@ -116,10 +117,17 @@ static int tcs3472_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 = tcs3472_req_data(data); - if (ret < 0) + if (ret < 0) { + mutex_unlock(&data->lock); return ret; + } ret = i2c_smbus_read_word_data(data->client, chan->address); + mutex_unlock(&data->lock); if (ret < 0) return ret; *val = ret; @@ -255,6 +263,7 @@ static int tcs3472_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 = &tcs3472_info; |