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Date: Fri, 18 Sep 2020 14:39:19 +0300
From: Alexandru Ardelean <ardeleanalex@...il.com>
To: Alexandru Ardelean <alexandru.ardelean@...log.com>
Cc: linux-iio <linux-iio@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
Jonathan Cameron <jic23@...nel.org>
Subject: Re: [PATCH 1/2] iio: event: use short-hand variable in
iio_device_{un}register_eventset functions
On Fri, Sep 18, 2020 at 1:34 PM Alexandru Ardelean
<alexandru.ardelean@...log.com> wrote:
>
> With the recent 'iio_dev_opaque' variable name, these two functions are
> looking a bit ugly.
>
> This change uses an 'ev_int' variable for the
> iio_device_{un}register_eventset functions to make the code a little easier
> to read.
>
Please disregard this series.
I found a bug with this.
Seems I didn't test it properly the first time.
> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
> ---
> drivers/iio/industrialio-event.c | 50 +++++++++++++++-----------------
> 1 file changed, 24 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
> index 2ab4d4c44427..96b7fa63f96c 100644
> --- a/drivers/iio/industrialio-event.c
> +++ b/drivers/iio/industrialio-event.c
> @@ -477,6 +477,7 @@ static const char *iio_event_group_name = "events";
> int iio_device_register_eventset(struct iio_dev *indio_dev)
> {
> struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
> + struct iio_event_interface *ev_int;
> struct iio_dev_attr *p;
> int ret = 0, attrcount_orig = 0, attrcount, attrn;
> struct attribute **attr;
> @@ -485,14 +486,13 @@ int iio_device_register_eventset(struct iio_dev *indio_dev)
> iio_check_for_dynamic_events(indio_dev)))
> return 0;
>
> - iio_dev_opaque->event_interface =
> - kzalloc(sizeof(struct iio_event_interface), GFP_KERNEL);
> - if (iio_dev_opaque->event_interface == NULL)
> + ev_int = kzalloc(sizeof(struct iio_event_interface), GFP_KERNEL);
> + if (ev_int == NULL)
> return -ENOMEM;
>
> - INIT_LIST_HEAD(&iio_dev_opaque->event_interface->dev_attr_list);
> + INIT_LIST_HEAD(&ev_int->dev_attr_list);
>
> - iio_setup_ev_int(iio_dev_opaque->event_interface);
> + iio_setup_ev_int(ev_int);
> if (indio_dev->info->event_attrs != NULL) {
> attr = indio_dev->info->event_attrs->attrs;
> while (*attr++ != NULL)
> @@ -506,34 +506,31 @@ int iio_device_register_eventset(struct iio_dev *indio_dev)
> attrcount += ret;
> }
>
> - iio_dev_opaque->event_interface->group.name = iio_event_group_name;
> - iio_dev_opaque->event_interface->group.attrs = kcalloc(attrcount + 1,
> - sizeof(iio_dev_opaque->event_interface->group.attrs[0]),
> - GFP_KERNEL);
> - if (iio_dev_opaque->event_interface->group.attrs == NULL) {
> + ev_int->group.name = iio_event_group_name;
> + ev_int->group.attrs = kcalloc(attrcount + 1,
> + sizeof(ev_int->group.attrs[0]),
> + GFP_KERNEL);
> + if (ev_int->group.attrs == NULL) {
> ret = -ENOMEM;
> goto error_free_setup_event_lines;
> }
> if (indio_dev->info->event_attrs)
> - memcpy(iio_dev_opaque->event_interface->group.attrs,
> + memcpy(ev_int->group.attrs,
> indio_dev->info->event_attrs->attrs,
> - sizeof(iio_dev_opaque->event_interface->group.attrs[0])
> - *attrcount_orig);
> + sizeof(ev_int->group.attrs[0]) * attrcount_orig);
> attrn = attrcount_orig;
> /* Add all elements from the list. */
> - list_for_each_entry(p,
> - &iio_dev_opaque->event_interface->dev_attr_list,
> - l)
> - iio_dev_opaque->event_interface->group.attrs[attrn++] =
> - &p->dev_attr.attr;
> - indio_dev->groups[indio_dev->groupcounter++] =
> - &iio_dev_opaque->event_interface->group;
> + list_for_each_entry(p, &ev_int->dev_attr_list, l)
> + ev_int->group.attrs[attrn++] = &p->dev_attr.attr;
> + indio_dev->groups[indio_dev->groupcounter++] = &ev_int->group;
> +
> + iio_dev_opaque->event_interface = ev_int;
>
> return 0;
>
> error_free_setup_event_lines:
> - iio_free_chan_devattr_list(&iio_dev_opaque->event_interface->dev_attr_list);
> - kfree(iio_dev_opaque->event_interface);
> + iio_free_chan_devattr_list(&ev_int->dev_attr_list);
> + kfree(ev_int);
> iio_dev_opaque->event_interface = NULL;
> return ret;
> }
> @@ -557,10 +554,11 @@ void iio_device_wakeup_eventset(struct iio_dev *indio_dev)
> void iio_device_unregister_eventset(struct iio_dev *indio_dev)
> {
> struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
> + struct iio_event_interface *ev_int = iio_dev_opaque->event_interface;
>
> - if (iio_dev_opaque->event_interface == NULL)
> + if (ev_int == NULL)
> return;
> - iio_free_chan_devattr_list(&iio_dev_opaque->event_interface->dev_attr_list);
> - kfree(iio_dev_opaque->event_interface->group.attrs);
> - kfree(iio_dev_opaque->event_interface);
> + iio_free_chan_devattr_list(&ev_int->dev_attr_list);
> + kfree(ev_int->group.attrs);
> + kfree(ev_int);
> }
> --
> 2.17.1
>
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