On Thu, Apr 16, 2015 at 12:01 PM, Robert Dolca <robert.dolca@xxxxxxxxx> wrote:
> Until now calling iio_trigger_register_with_dev after registering the IIO device
> added the trigger to the device's trigger list and saved a reference to the
> device in the trigger's struct but it did not create the symlink.
>
> In order to know if the device was registered or not this patch adds a flag
> in the dev_iio struct and checks it when iio_trigger_register_with_dev is
> called.
I don't think we should care about this. In order for the symlink to be created
the driver should call the right sequence of functions.
>
> Signed-off-by: Robert Dolca <robert.dolca@xxxxxxxxx>
> ---
> drivers/iio/industrialio-core.c | 4 ++++
> drivers/iio/industrialio-trigger.c | 6 ++++++
> include/linux/iio/iio.h | 1 +
> 3 files changed, 11 insertions(+)
>
> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> index 94bcd54..04862a4 100644
> --- a/drivers/iio/industrialio-core.c
> +++ b/drivers/iio/industrialio-core.c
> @@ -1233,6 +1233,8 @@ int iio_device_register(struct iio_dev *indio_dev)
> goto error_cdev_del;
> }
>
> + indio_dev->registered = true;
> +
> return 0;
> error_cdev_del:
> cdev_del(&indio_dev->chrdev);
> @@ -1281,6 +1283,8 @@ void iio_device_unregister(struct iio_dev *indio_dev)
> mutex_unlock(&indio_dev->info_exist_lock);
>
> iio_buffer_free_sysfs_and_mask(indio_dev);
> +
> + indio_dev->registered = false;
> }
> EXPORT_SYMBOL(iio_device_unregister);
>
> diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c
> index cebdd10..d4118fe 100644
> --- a/drivers/iio/industrialio-trigger.c
> +++ b/drivers/iio/industrialio-trigger.c
> @@ -69,6 +69,12 @@ int iio_trigger_register_with_dev(struct iio_dev *indio_dev,
> trig_info->indio_dev = indio_dev;
> list_add(&trig_info->indio_dev_list, &indio_dev->triggers);
>
> + if (indio_dev->registered) {
> + ret = iio_trigger_link(trig_info);
> + if (ret < 0)
> + goto error;
> + }
> +
> return 0;
> error:
> return ret;
> diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
> index 9ff54ef..3f704ae 100644
> --- a/include/linux/iio/iio.h
> +++ b/include/linux/iio/iio.h
> @@ -496,6 +496,7 @@ struct iio_dev {
> unsigned cached_reg_addr;
> #endif
> struct list_head triggers;
> + bool registered;
> };
>
> const struct iio_chan_spec
> --
> 1.9.1
>
> --
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