diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-13 15:54:09 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-13 15:54:09 -0700 |
| commit | 85bf20d18ac0cf6e729465efcb8758b5db2ec6c2 (patch) | |
| tree | 82e174c1655e50862ab89993f2955bf954ad469f /drivers/iio/light/tcs3472.c | |
| parent | 526a4045c60fbaede88ec95a69a73059dff02160 (diff) | |
| parent | 1795cd9b3a91d4b5473c97f491d63892442212ab (diff) | |
| download | linux-85bf20d18ac0cf6e729465efcb8758b5db2ec6c2.tar.gz linux-85bf20d18ac0cf6e729465efcb8758b5db2ec6c2.tar.xz | |
Merge 3.16-rc5 into usb-next
We want those fixes 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; |