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| author | Nuno Sá <nuno.sa@analog.com> | 2020-11-21 17:14:57 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2020-12-03 20:32:40 +0100 |
| commit | 6d74a3ee1ee1c7b62de656c26d370448ed5885c3 (patch) | |
| tree | b388dbe103d259273e8edc82201055e7f6a58358 /drivers/iio/buffer | |
| parent | ASoC: stm32: dfsdm: add stm32_adfsdm_dummy_cb() callback (diff) | |
| download | linux-6d74a3ee1ee1c7b62de656c26d370448ed5885c3.tar.xz linux-6d74a3ee1ee1c7b62de656c26d370448ed5885c3.zip | |
iio: buffer: Return error if no callback is given
Return error in case no callback is provided to
`iio_channel_get_all_cb()`. There's no point in setting up a buffer-cb
if no callback is provided.
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Olivier Moysan <olivier.moysan@st.com>
Link: https://lore.kernel.org/r/20201121161457.957-3-nuno.sa@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/buffer')
| -rw-r--r-- | drivers/iio/buffer/industrialio-buffer-cb.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/iio/buffer/industrialio-buffer-cb.c b/drivers/iio/buffer/industrialio-buffer-cb.c index 47c96f7f4976..4c12b7a94af5 100644 --- a/drivers/iio/buffer/industrialio-buffer-cb.c +++ b/drivers/iio/buffer/industrialio-buffer-cb.c @@ -54,6 +54,11 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev, struct iio_cb_buffer *cb_buff; struct iio_channel *chan; + if (!cb) { + dev_err(dev, "Invalid arguments: A callback must be provided!\n"); + return ERR_PTR(-EINVAL); + } + cb_buff = kzalloc(sizeof(*cb_buff), GFP_KERNEL); if (cb_buff == NULL) return ERR_PTR(-ENOMEM); |