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Message-ID: <CAJZ5v0j+2UM9zONBZpLW=X2KKQU5mDd8r=o9DqTq3rqoigBqrw@mail.gmail.com>
Date: Sat, 24 Sep 2022 19:36:04 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Daniel Lezcano <daniel.lezcano@...aro.org>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Linux PM <linux-pm@...r.kernel.org>,
Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
Amit Kucheria <amitk@...nel.org>,
Zhang Rui <rui.zhang@...el.com>,
Antoine Tenart <atenart@...nel.org>
Subject: Re: [PATCH v3 29/30] thermal/intel/int340x: Replace parameter to simplify
On Tue, Sep 6, 2022 at 6:48 PM Daniel Lezcano <daniel.lezcano@...aro.org> wrote:
>
> In the process of replacing the get_trip_* ops by the generic trip
> points, the current code has an 'override' property to add another
> indirection to a different ops.
>
> Rework this approach to prevent this indirection and make the code
> ready for the generic trip points conversion.
>
> Actually the get_temp() is different regarding the platform, so it is
> pointless to add a new set of ops but just create dynamically the ops
> at init time.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
A fix has been posted for this one already:
https://patchwork.kernel.org/project/linux-pm/patch/20220923152009.1721739-1-nathan@kernel.org/
> ---
> .../int340x_thermal/int340x_thermal_zone.c | 31 ++++++++-----------
> .../int340x_thermal/int340x_thermal_zone.h | 4 +--
> .../processor_thermal_device.c | 10 ++----
> 3 files changed, 18 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
> index 62c0aa5d0783..10731b9a140a 100644
> --- a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
> +++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
> @@ -18,9 +18,6 @@ static int int340x_thermal_get_zone_temp(struct thermal_zone_device *zone,
> unsigned long long tmp;
> acpi_status status;
>
> - if (d->override_ops && d->override_ops->get_temp)
> - return d->override_ops->get_temp(zone, temp);
> -
> status = acpi_evaluate_integer(d->adev->handle, "_TMP", NULL, &tmp);
> if (ACPI_FAILURE(status))
> return -EIO;
> @@ -46,9 +43,6 @@ static int int340x_thermal_get_trip_temp(struct thermal_zone_device *zone,
> struct int34x_thermal_zone *d = zone->devdata;
> int i;
>
> - if (d->override_ops && d->override_ops->get_trip_temp)
> - return d->override_ops->get_trip_temp(zone, trip, temp);
> -
> if (trip < d->aux_trip_nr)
> *temp = d->aux_trips[trip];
> else if (trip == d->crt_trip_id)
> @@ -79,9 +73,6 @@ static int int340x_thermal_get_trip_type(struct thermal_zone_device *zone,
> struct int34x_thermal_zone *d = zone->devdata;
> int i;
>
> - if (d->override_ops && d->override_ops->get_trip_type)
> - return d->override_ops->get_trip_type(zone, trip, type);
> -
> if (trip < d->aux_trip_nr)
> *type = THERMAL_TRIP_PASSIVE;
> else if (trip == d->crt_trip_id)
> @@ -112,9 +103,6 @@ static int int340x_thermal_set_trip_temp(struct thermal_zone_device *zone,
> acpi_status status;
> char name[10];
>
> - if (d->override_ops && d->override_ops->set_trip_temp)
> - return d->override_ops->set_trip_temp(zone, trip, temp);
> -
> snprintf(name, sizeof(name), "PAT%d", trip);
> status = acpi_execute_simple_method(d->adev->handle, name,
> millicelsius_to_deci_kelvin(temp));
> @@ -134,9 +122,6 @@ static int int340x_thermal_get_trip_hyst(struct thermal_zone_device *zone,
> acpi_status status;
> unsigned long long hyst;
>
> - if (d->override_ops && d->override_ops->get_trip_hyst)
> - return d->override_ops->get_trip_hyst(zone, trip, temp);
> -
> status = acpi_evaluate_integer(d->adev->handle, "GTSH", NULL, &hyst);
> if (ACPI_FAILURE(status))
> *temp = 0;
> @@ -217,7 +202,7 @@ static struct thermal_zone_params int340x_thermal_params = {
> };
>
> struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
> - struct thermal_zone_device_ops *override_ops)
> + int (*get_temp) (struct thermal_zone_device *, int *))
> {
> struct int34x_thermal_zone *int34x_thermal_zone;
> acpi_status status;
> @@ -231,8 +216,15 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
> return ERR_PTR(-ENOMEM);
>
> int34x_thermal_zone->adev = adev;
> - int34x_thermal_zone->override_ops = override_ops;
>
> + int34x_thermal_zone->ops = kmemdup(&int340x_thermal_zone_ops,
> + sizeof(int340x_thermal_zone_ops), GFP_KERNEL);
> + if (!int34x_thermal_zone->ops)
> + goto err_ops_alloc;
> +
> + if (get_temp)
> + int34x_thermal_zone->ops->get_temp = get_temp;
> +
> status = acpi_evaluate_integer(adev->handle, "PATC", NULL, &trip_cnt);
> if (ACPI_FAILURE(status))
> trip_cnt = 0;
> @@ -262,7 +254,7 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
> acpi_device_bid(adev),
> trip_cnt,
> trip_mask, int34x_thermal_zone,
> - &int340x_thermal_zone_ops,
> + int34x_thermal_zone->ops,
> &int340x_thermal_params,
> 0, 0);
> if (IS_ERR(int34x_thermal_zone->zone)) {
> @@ -281,6 +273,8 @@ struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
> acpi_lpat_free_conversion_table(int34x_thermal_zone->lpat_table);
> kfree(int34x_thermal_zone->aux_trips);
> err_trip_alloc:
> + kfree(int34x_thermal_zone->ops);
> +err_ops_alloc:
> kfree(int34x_thermal_zone);
> return ERR_PTR(ret);
> }
> @@ -292,6 +286,7 @@ void int340x_thermal_zone_remove(struct int34x_thermal_zone
> thermal_zone_device_unregister(int34x_thermal_zone->zone);
> acpi_lpat_free_conversion_table(int34x_thermal_zone->lpat_table);
> kfree(int34x_thermal_zone->aux_trips);
> + kfree(int34x_thermal_zone->ops);
> kfree(int34x_thermal_zone);
> }
> EXPORT_SYMBOL_GPL(int340x_thermal_zone_remove);
> diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h
> index 3b4971df1b33..e28ab1ba5e06 100644
> --- a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h
> +++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.h
> @@ -29,13 +29,13 @@ struct int34x_thermal_zone {
> int hot_temp;
> int hot_trip_id;
> struct thermal_zone_device *zone;
> - struct thermal_zone_device_ops *override_ops;
> + struct thermal_zone_device_ops *ops;
> void *priv_data;
> struct acpi_lpat_conversion_table *lpat_table;
> };
>
> struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *,
> - struct thermal_zone_device_ops *override_ops);
> + int (*get_temp) (struct thermal_zone_device *, int *));
> void int340x_thermal_zone_remove(struct int34x_thermal_zone *);
> int int340x_thermal_read_trips(struct int34x_thermal_zone *int34x_zone);
>
> diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
> index a8d98f1bd6c6..317703027ce9 100644
> --- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
> +++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
> @@ -207,10 +207,6 @@ static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone,
> return ret;
> }
>
> -static struct thermal_zone_device_ops proc_thermal_local_ops = {
> - .get_temp = proc_thermal_get_zone_temp,
> -};
> -
> static int proc_thermal_read_ppcc(struct proc_thermal_device *proc_priv)
> {
> int i;
> @@ -285,7 +281,7 @@ int proc_thermal_add(struct device *dev, struct proc_thermal_device *proc_priv)
> struct acpi_device *adev;
> acpi_status status;
> unsigned long long tmp;
> - struct thermal_zone_device_ops *ops = NULL;
> + int (*get_temp) (struct thermal_zone_device *, int *) = NULL;
> int ret;
>
> adev = ACPI_COMPANION(dev);
> @@ -304,10 +300,10 @@ int proc_thermal_add(struct device *dev, struct proc_thermal_device *proc_priv)
> /* there is no _TMP method, add local method */
> stored_tjmax = get_tjmax();
> if (stored_tjmax > 0)
> - ops = &proc_thermal_local_ops;
> + get_temp = proc_thermal_get_zone_temp;
> }
>
> - proc_priv->int340x_zone = int340x_thermal_zone_add(adev, ops);
> + proc_priv->int340x_zone = int340x_thermal_zone_add(adev, get_temp);
> if (IS_ERR(proc_priv->int340x_zone)) {
> return PTR_ERR(proc_priv->int340x_zone);
> } else
> --
> 2.34.1
>
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