On Mon, Dec 27, 2021 at 10:45:07AM +0100, Uwe Kleine-König wrote:
> For now this just wraps accessing struct counter_device::priv. However
> this is about to change and converting drivers to this helper
> individually makes fixing device lifetime issues result in easier to
> review patches.
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
> ---
> drivers/counter/counter-core.c | 12 ++++++++++++
> include/linux/counter.h | 2 ++
> 2 files changed, 14 insertions(+)
>
> diff --git a/drivers/counter/counter-core.c b/drivers/counter/counter-core.c
> index f053a43c6c04..00c41f28c101 100644
> --- a/drivers/counter/counter-core.c
> +++ b/drivers/counter/counter-core.c
> @@ -45,6 +45,18 @@ static struct bus_type counter_bus_type = {
>
> static dev_t counter_devt;
>
> +/**
> + * counter_priv - access counter device private data
> + * @counter: counter device
> + *
> + * Get the counter device private data
> + */
> +void *counter_priv(const struct counter_device *const counter)
> +{
> + return counter->priv;
> +}
> +EXPORT_SYMBOL_GPL(counter_priv);
Shouldn't this be usin gdev_get_drvdata() and using the private data
pointer that is already on the struct device structure itself? The void
*priv; should be dropped from struct counter_device entirely.
Oh ick, I just now looked at 'struct counter_device', there are other
reference counting issues in there (hint, struct cdev has a reference
count...) But that's independent of this patch series...
thanks,
greg k-h
