From: Chanwoo Choi <cw00.choi@samsung.com>
To: "Artur Świgoń" <a.swigon@samsung.com>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-pm@vger.kernel.org, dri-devel@lists.freedesktop.org
Cc: "Artur Świgoń" <a.swigon@partner.samsung.com>,
b.zolnierkie@samsung.com, sw0312.kim@samsung.com,
krzk@kernel.org, inki.dae@samsung.com, myungjoo.ham@samsung.com,
leonard.crestez@nxp.com, georgi.djakov@linaro.org,
m.szyprowski@samsung.com
Subject: Re: [RFC PATCH v2 04/11] devfreq: exynos-bus: Clean up code
Date: Fri, 20 Sep 2019 11:22:06 +0900 [thread overview]
Message-ID: <39db18c5-534d-ff72-0a7f-7a838c13fa7a@samsung.com> (raw)
In-Reply-To: <20190919142236.4071-5-a.swigon@samsung.com>
Hi Artur,
On 19. 9. 19. 오후 11:22, Artur Świgoń wrote:
> From: Artur Świgoń <a.swigon@partner.samsung.com>
>
> This patch adds minor improvements to the exynos-bus driver.
>
> Signed-off-by: Artur Świgoń <a.swigon@partner.samsung.com>
> Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
> ---
> drivers/devfreq/exynos-bus.c | 66 ++++++++++++++----------------------
> 1 file changed, 25 insertions(+), 41 deletions(-)
>
> diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
> index 60ad4319fd80..8d44810cac69 100644
> --- a/drivers/devfreq/exynos-bus.c
> +++ b/drivers/devfreq/exynos-bus.c
> @@ -15,11 +15,10 @@
> #include <linux/device.h>
> #include <linux/export.h>
> #include <linux/module.h>
> -#include <linux/of_device.h>
> +#include <linux/of.h>
> #include <linux/pm_opp.h>
> #include <linux/platform_device.h>
> #include <linux/regulator/consumer.h>
> -#include <linux/slab.h>
>
> #define DEFAULT_SATURATION_RATIO 40
>
> @@ -178,7 +177,7 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
> struct device *dev = bus->dev;
> struct opp_table *opp_table;
> const char *vdd = "vdd";
> - int i, ret, count, size;
> + int i, ret, count;
>
> opp_table = dev_pm_opp_set_regulators(dev, &vdd, 1);
> if (IS_ERR(opp_table)) {
> @@ -201,8 +200,7 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
> }
> bus->edev_count = count;
>
> - size = sizeof(*bus->edev) * count;
> - bus->edev = devm_kzalloc(dev, size, GFP_KERNEL);
> + bus->edev = devm_kcalloc(dev, count, sizeof(*bus->edev), GFP_KERNEL);
> if (!bus->edev) {
> ret = -ENOMEM;
> goto err_regulator;
> @@ -301,10 +299,9 @@ static int exynos_bus_profile_init(struct exynos_bus *bus,
> profile->exit = exynos_bus_exit;
>
> ondemand_data = devm_kzalloc(dev, sizeof(*ondemand_data), GFP_KERNEL);
> - if (!ondemand_data) {
> - ret = -ENOMEM;
> - goto err;
> - }
> + if (!ondemand_data)
> + return -ENOMEM;
> +
> ondemand_data->upthreshold = 40;
> ondemand_data->downdifferential = 5;
>
> @@ -314,8 +311,7 @@ static int exynos_bus_profile_init(struct exynos_bus *bus,
> ondemand_data);
> if (IS_ERR(bus->devfreq)) {
> dev_err(dev, "failed to add devfreq device\n");
> - ret = PTR_ERR(bus->devfreq);
> - goto err;
> + return PTR_ERR(bus->devfreq);
> }
>
> /*
> @@ -325,16 +321,13 @@ static int exynos_bus_profile_init(struct exynos_bus *bus,
> ret = exynos_bus_enable_edev(bus);
> if (ret < 0) {
> dev_err(dev, "failed to enable devfreq-event devices\n");
> - goto err;
> + return ret;
> }
>
> ret = exynos_bus_set_event(bus);
> - if (ret < 0) {
> + if (ret < 0)
> dev_err(dev, "failed to set event to devfreq-event devices\n");
> - goto err;
Instead of removing 'goto err', just return err as I commented[1] on v1.
[1] https://lkml.org/lkml/2019/7/26/331
> - }
>
> -err:
> return ret;
And you just keep 'return ret' or you can change it as 'return 0'.
> }
>
> @@ -344,7 +337,6 @@ static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
> struct device *dev = bus->dev;
> struct devfreq_passive_data *passive_data;
> struct devfreq *parent_devfreq;
> - int ret = 0;
>
> /* Initialize the struct profile and governor data for passive device */
> profile->target = exynos_bus_target;
> @@ -352,30 +344,26 @@ static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
>
> /* Get the instance of parent devfreq device */
> parent_devfreq = devfreq_get_devfreq_by_phandle(dev, 0);
> - if (IS_ERR(parent_devfreq)) {
> - ret = -EPROBE_DEFER;
> - goto err;
> - }
> + if (IS_ERR(parent_devfreq))
> + return -EPROBE_DEFER;
>
> passive_data = devm_kzalloc(dev, sizeof(*passive_data), GFP_KERNEL);
> - if (!passive_data) {
> - ret = -ENOMEM;
> - goto err;
> - }
> + if (!passive_data)
> + return -ENOMEM;
> +
> passive_data->parent = parent_devfreq;
>
> /* Add devfreq device for exynos bus with passive governor */
> - bus->devfreq = devm_devfreq_add_device(dev, profile, DEVFREQ_GOV_PASSIVE,
> + bus->devfreq = devm_devfreq_add_device(dev, profile,
> + DEVFREQ_GOV_PASSIVE,
> passive_data);
> if (IS_ERR(bus->devfreq)) {
> dev_err(dev,
> "failed to add devfreq dev with passive governor\n");
> - ret = PTR_ERR(bus->devfreq);
> - goto err;
> + return PTR_ERR(bus->devfreq);
> }
>
> -err:
> - return ret;
> + return 0;
> }
>
> static int exynos_bus_probe(struct platform_device *pdev)
> @@ -393,18 +381,18 @@ static int exynos_bus_probe(struct platform_device *pdev)
> return -EINVAL;
> }
>
> - bus = devm_kzalloc(&pdev->dev, sizeof(*bus), GFP_KERNEL);
> + bus = devm_kzalloc(dev, sizeof(*bus), GFP_KERNEL);
> if (!bus)
> return -ENOMEM;
> mutex_init(&bus->lock);
> - bus->dev = &pdev->dev;
> + bus->dev = dev;
> platform_set_drvdata(pdev, bus);
>
> profile = devm_kzalloc(dev, sizeof(*profile), GFP_KERNEL);
> if (!profile)
> return -ENOMEM;
>
> - node = of_parse_phandle(dev->of_node, "devfreq", 0);
> + node = of_parse_phandle(np, "devfreq", 0);
> if (node) {
> of_node_put(node);
> passive = true;
> @@ -461,12 +449,10 @@ static int exynos_bus_resume(struct device *dev)
> int ret;
>
> ret = exynos_bus_enable_edev(bus);
> - if (ret < 0) {
> + if (ret < 0)
> dev_err(dev, "failed to enable the devfreq-event devices\n");
> - return ret;
Keep the 'return ret' if error happen as I commented[1] on v1.
[1] https://lkml.org/lkml/2019/7/26/331
> - }
>
> - return 0;
> + return ret;
And you just keep 'return 0' or you can change it as 'return ret'.
> }
>
> static int exynos_bus_suspend(struct device *dev)
> @@ -475,12 +461,10 @@ static int exynos_bus_suspend(struct device *dev)
> int ret;
>
> ret = exynos_bus_disable_edev(bus);
> - if (ret < 0) {
> + if (ret < 0)
> dev_err(dev, "failed to disable the devfreq-event devices\n");
> - return ret;
Keep the 'return ret' if error happen as I commented[1] on v1.
[1] https://lkml.org/lkml/2019/7/26/331
> - }
>
> - return 0;
> + return ret;
And you just keep 'return 0' or you can change it as 'return ret'.
> }
> #endif
>
>
--
Best Regards,
Chanwoo Choi
Samsung Electronics
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next prev parent reply other threads:[~2019-09-20 2:18 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20190919142321eucas1p164c2591ad402427cb71fd00c348a29ec@eucas1p1.samsung.com>
2019-09-19 14:22 ` [RFC PATCH v2 00/11] Simple QoS for exynos-bus driver using interconnect Artur Świgoń
[not found] ` <CGME20190919142322eucas1p24bc477ee6e1bcd65546c305d55af097d@eucas1p2.samsung.com>
2019-09-19 14:22 ` [RFC PATCH v2 01/11] devfreq: exynos-bus: Extract exynos_bus_profile_init() Artur Świgoń
2019-09-20 2:15 ` Chanwoo Choi
2019-09-25 5:44 ` Artur Świgoń
2019-09-25 6:37 ` Chanwoo Choi
2019-09-25 6:41 ` Artur Świgoń
[not found] ` <CGME20190919142322eucas1p1949ad95468af26698c4c5addc060ce00@eucas1p1.samsung.com>
2019-09-19 14:22 ` [RFC PATCH v2 02/11] devfreq: exynos-bus: Extract exynos_bus_profile_init_passive() Artur Świgoń
[not found] ` <CGME20190919142323eucas1p2fc73a765389432f880fa28945fd28975@eucas1p2.samsung.com>
2019-09-19 14:22 ` [RFC PATCH v2 03/11] devfreq: exynos-bus: Change goto-based logic to if-else logic Artur Świgoń
[not found] ` <CGME20190919142324eucas1p1638cec2aafbfcaf03cfdfa7d0189143a@eucas1p1.samsung.com>
2019-09-19 14:22 ` [RFC PATCH v2 04/11] devfreq: exynos-bus: Clean up code Artur Świgoń
2019-09-20 2:22 ` Chanwoo Choi [this message]
2019-10-03 8:10 ` Artur Świgoń
[not found] ` <CGME20190919142325eucas1p28102446c22b1e1c61aae0bad46d079b0@eucas1p2.samsung.com>
2019-09-19 14:22 ` [RFC PATCH v2 05/11] interconnect: Export of_icc_get_from_provider() Artur Świgoń
2019-12-16 0:57 ` Chanwoo Choi
[not found] ` <CGME20190919142326eucas1p204819014fe85716b47e2de4af9102cd5@eucas1p2.samsung.com>
2019-09-19 14:22 ` [RFC PATCH v2 06/11] interconnect: Relax requirement in of_icc_get_from_provider() Artur Świgoń
[not found] ` <CGME20190919142327eucas1p183470eede07b50c1e3acda58f2af1eba@eucas1p1.samsung.com>
2019-09-19 14:22 ` [RFC PATCH v2 07/11] interconnect: Relax condition in apply_constraints() Artur Świgoń
[not found] ` <CGME20190919142329eucas1p299762f99dd55a5d625633ceec84219f9@eucas1p2.samsung.com>
2019-09-19 14:22 ` [RFC PATCH v2 08/11] arm: dts: exynos: Add parents and #interconnect-cells to Exynos4412 Artur Świgoń
2019-12-16 0:51 ` Chanwoo Choi
2019-12-16 2:59 ` Chanwoo Choi
2019-12-18 10:17 ` Artur Świgoń
2019-12-18 10:29 ` Chanwoo Choi
2019-12-18 10:41 ` Artur Świgoń
2019-12-16 0:55 ` Chanwoo Choi
2019-12-16 0:57 ` Chanwoo Choi
[not found] ` <CGME20190919142329eucas1p2e53992eab9ec6b404f716f955b3c228e@eucas1p2.samsung.com>
2019-09-19 14:22 ` [RFC PATCH v2 09/11] devfreq: exynos-bus: Add interconnect functionality to exynos-bus Artur Świgoń
2019-09-25 7:03 ` Chanwoo Choi
2019-09-25 7:12 ` Artur Świgoń
2019-12-02 17:05 ` Artur Świgoń
2019-12-05 2:36 ` Chanwoo Choi
2019-12-16 0:44 ` Chanwoo Choi
2019-12-18 10:18 ` Artur Świgoń
2019-12-18 10:39 ` Chanwoo Choi
2019-12-18 10:48 ` Artur Świgoń
2019-12-18 11:08 ` Chanwoo Choi
[not found] ` <CGME20190919142330eucas1p1eceae78b148a03f2af71657b7cdd6694@eucas1p1.samsung.com>
2019-09-19 14:22 ` [RFC PATCH v2 10/11] arm: dts: exynos: Add interconnects to Exynos4412 mixer Artur Świgoń
[not found] ` <CGME20190919142331eucas1p2107a7cb9ce8b3817ed171c21a8ad5b00@eucas1p2.samsung.com>
2019-09-19 14:22 ` [RFC PATCH v2 11/11] drm: exynos: mixer: Add interconnect support Artur Świgoń
2019-09-20 1:07 ` [RFC PATCH v2 00/11] Simple QoS for exynos-bus driver using interconnect Chanwoo Choi
2019-09-20 2:14 ` Chanwoo Choi
2019-09-25 5:47 ` Artur Świgoń
2019-09-25 6:12 ` Chanwoo Choi
2019-09-25 6:37 ` Artur Świgoń
2019-09-25 6:48 ` Chanwoo Choi
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