From: Dong Aisheng <aisheng.dong@nxp.com> To: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: dongas86@gmail.com, kernel@pengutronix.de, shawnguo@kernel.org, linux-imx@nxp.com, linux-kernel@vger.kernel.org, myungjoo.ham@samsung.com, kyungmin.park@samsung.com, cw00.choi@samsung.com, abel.vesa@nxp.com, Dong Aisheng <aisheng.dong@nxp.com> Subject: [PATCH 07/11] PM / devfreq: check get_dev_status before start monitor Date: Tue, 9 Mar 2021 20:58:49 +0800 [thread overview] Message-ID: <1615294733-22761-20-git-send-email-aisheng.dong@nxp.com> (raw) In-Reply-To: <1615294733-22761-1-git-send-email-aisheng.dong@nxp.com> The devfreq monitor depends on the device to provide load information by .get_dev_status() to calculate the next target freq. And this will cause changing governor to simple ondemand fail if device can't support. Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> --- drivers/devfreq/devfreq.c | 10 +++++++--- drivers/devfreq/governor.h | 2 +- drivers/devfreq/governor_simpleondemand.c | 3 +-- 3 files changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 7231fe6862a2..d1787b6c7d7c 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -482,10 +482,13 @@ static void devfreq_monitor(struct work_struct *work) * to be called from governor in response to DEVFREQ_GOV_START * event when device is added to devfreq framework. */ -void devfreq_monitor_start(struct devfreq *devfreq) +int devfreq_monitor_start(struct devfreq *devfreq) { if (IS_SUPPORTED_FLAG(devfreq->governor->flags, IRQ_DRIVEN)) - return; + return 0; + + if (!devfreq->profile->get_dev_status) + return -EINVAL; switch (devfreq->profile->timer) { case DEVFREQ_TIMER_DEFERRABLE: @@ -495,12 +498,13 @@ void devfreq_monitor_start(struct devfreq *devfreq) INIT_DELAYED_WORK(&devfreq->work, devfreq_monitor); break; default: - return; + return -EINVAL; } if (devfreq->profile->polling_ms) queue_delayed_work(devfreq_wq, &devfreq->work, msecs_to_jiffies(devfreq->profile->polling_ms)); + return 0; } EXPORT_SYMBOL(devfreq_monitor_start); diff --git a/drivers/devfreq/governor.h b/drivers/devfreq/governor.h index 5cee3f64fe2b..31af6d072a10 100644 --- a/drivers/devfreq/governor.h +++ b/drivers/devfreq/governor.h @@ -75,7 +75,7 @@ struct devfreq_governor { unsigned int event, void *data); }; -void devfreq_monitor_start(struct devfreq *devfreq); +int devfreq_monitor_start(struct devfreq *devfreq); void devfreq_monitor_stop(struct devfreq *devfreq); void devfreq_monitor_suspend(struct devfreq *devfreq); void devfreq_monitor_resume(struct devfreq *devfreq); diff --git a/drivers/devfreq/governor_simpleondemand.c b/drivers/devfreq/governor_simpleondemand.c index d57b82a2b570..ea287b57cbf3 100644 --- a/drivers/devfreq/governor_simpleondemand.c +++ b/drivers/devfreq/governor_simpleondemand.c @@ -89,8 +89,7 @@ static int devfreq_simple_ondemand_handler(struct devfreq *devfreq, { switch (event) { case DEVFREQ_GOV_START: - devfreq_monitor_start(devfreq); - break; + return devfreq_monitor_start(devfreq); case DEVFREQ_GOV_STOP: devfreq_monitor_stop(devfreq); -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Dong Aisheng <aisheng.dong@nxp.com> To: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: dongas86@gmail.com, kernel@pengutronix.de, shawnguo@kernel.org, linux-imx@nxp.com, linux-kernel@vger.kernel.org, myungjoo.ham@samsung.com, kyungmin.park@samsung.com, cw00.choi@samsung.com, abel.vesa@nxp.com, Dong Aisheng <aisheng.dong@nxp.com> Subject: [PATCH 07/11] PM / devfreq: check get_dev_status before start monitor Date: Tue, 9 Mar 2021 20:58:49 +0800 [thread overview] Message-ID: <1615294733-22761-20-git-send-email-aisheng.dong@nxp.com> (raw) In-Reply-To: <1615294733-22761-1-git-send-email-aisheng.dong@nxp.com> The devfreq monitor depends on the device to provide load information by .get_dev_status() to calculate the next target freq. And this will cause changing governor to simple ondemand fail if device can't support. Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> --- drivers/devfreq/devfreq.c | 10 +++++++--- drivers/devfreq/governor.h | 2 +- drivers/devfreq/governor_simpleondemand.c | 3 +-- 3 files changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 7231fe6862a2..d1787b6c7d7c 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -482,10 +482,13 @@ static void devfreq_monitor(struct work_struct *work) * to be called from governor in response to DEVFREQ_GOV_START * event when device is added to devfreq framework. */ -void devfreq_monitor_start(struct devfreq *devfreq) +int devfreq_monitor_start(struct devfreq *devfreq) { if (IS_SUPPORTED_FLAG(devfreq->governor->flags, IRQ_DRIVEN)) - return; + return 0; + + if (!devfreq->profile->get_dev_status) + return -EINVAL; switch (devfreq->profile->timer) { case DEVFREQ_TIMER_DEFERRABLE: @@ -495,12 +498,13 @@ void devfreq_monitor_start(struct devfreq *devfreq) INIT_DELAYED_WORK(&devfreq->work, devfreq_monitor); break; default: - return; + return -EINVAL; } if (devfreq->profile->polling_ms) queue_delayed_work(devfreq_wq, &devfreq->work, msecs_to_jiffies(devfreq->profile->polling_ms)); + return 0; } EXPORT_SYMBOL(devfreq_monitor_start); diff --git a/drivers/devfreq/governor.h b/drivers/devfreq/governor.h index 5cee3f64fe2b..31af6d072a10 100644 --- a/drivers/devfreq/governor.h +++ b/drivers/devfreq/governor.h @@ -75,7 +75,7 @@ struct devfreq_governor { unsigned int event, void *data); }; -void devfreq_monitor_start(struct devfreq *devfreq); +int devfreq_monitor_start(struct devfreq *devfreq); void devfreq_monitor_stop(struct devfreq *devfreq); void devfreq_monitor_suspend(struct devfreq *devfreq); void devfreq_monitor_resume(struct devfreq *devfreq); diff --git a/drivers/devfreq/governor_simpleondemand.c b/drivers/devfreq/governor_simpleondemand.c index d57b82a2b570..ea287b57cbf3 100644 --- a/drivers/devfreq/governor_simpleondemand.c +++ b/drivers/devfreq/governor_simpleondemand.c @@ -89,8 +89,7 @@ static int devfreq_simple_ondemand_handler(struct devfreq *devfreq, { switch (event) { case DEVFREQ_GOV_START: - devfreq_monitor_start(devfreq); - break; + return devfreq_monitor_start(devfreq); case DEVFREQ_GOV_STOP: devfreq_monitor_stop(devfreq); -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-03-09 13:13 UTC|newest] Thread overview: 116+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-03-09 12:58 [PATCH 00/11] PM / devfreq: a few small fixes and improvements Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 01/11] doc: ABI: devfreq: remove invalid central_polling description Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 15:01 ` Chanwoo Choi 2021-03-09 15:01 ` Chanwoo Choi 2021-03-09 12:58 ` [PATCH 02/11] PM / devfreq: remove the invalid description for get_target_freq Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 15:02 ` Chanwoo Choi 2021-03-09 15:02 ` Chanwoo Choi 2021-03-09 15:14 ` Dong Aisheng 2021-03-09 15:14 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 03/11] PM / devfreq: fix the wrong set_freq path for userspace governor Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 15:13 ` Chanwoo Choi 2021-03-09 15:13 ` Chanwoo Choi 2021-03-09 15:16 ` Dong Aisheng 2021-03-09 15:16 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 04/11] PM / devfreq: bail out early if no freq changes in devfreq_set_target Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 15:47 ` Chanwoo Choi 2021-03-09 15:47 ` Chanwoo Choi 2021-03-10 2:42 ` Dong Aisheng 2021-03-10 2:42 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 05/11] PM / devfreq: use more accurate returned new_freq as resume_freq Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 15:53 ` Chanwoo Choi 2021-03-09 15:53 ` Chanwoo Choi 2021-03-10 2:43 ` Dong Aisheng 2021-03-10 2:43 ` Dong Aisheng 2021-03-10 3:07 ` Chanwoo Choi 2021-03-10 3:07 ` Chanwoo Choi 2021-03-10 3:04 ` Dong Aisheng 2021-03-10 3:04 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 06/11] PM / devfreq: drop the unnecessary low variable initialization Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 07/11] PM / devfreq: check get_dev_status before start monitor Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 15:58 ` Chanwoo Choi 2021-03-09 15:58 ` Chanwoo Choi 2021-03-09 16:12 ` Chanwoo Choi 2021-03-09 16:12 ` Chanwoo Choi 2021-03-10 2:56 ` Dong Aisheng 2021-03-10 2:56 ` Dong Aisheng 2021-03-10 3:25 ` Chanwoo Choi 2021-03-10 3:25 ` Chanwoo Choi 2021-03-10 4:56 ` Dong Aisheng 2021-03-10 4:56 ` Dong Aisheng 2021-03-11 7:10 ` Chanwoo Choi 2021-03-11 7:10 ` Chanwoo Choi 2021-03-12 10:57 ` Dong Aisheng 2021-03-12 10:57 ` Dong Aisheng 2021-03-12 16:09 ` Chanwoo Choi 2021-03-12 16:09 ` Chanwoo Choi 2021-03-13 6:45 ` Dong Aisheng 2021-03-13 6:45 ` Dong Aisheng 2021-03-18 8:03 ` Dong Aisheng 2021-03-18 8:03 ` Dong Aisheng 2021-03-18 9:54 ` Chanwoo Choi 2021-03-18 9:54 ` Chanwoo Choi 2021-03-18 9:59 ` Chanwoo Choi 2021-03-18 9:59 ` Chanwoo Choi 2021-03-18 10:51 ` Dong Aisheng 2021-03-18 10:51 ` Dong Aisheng 2021-03-10 2:51 ` Dong Aisheng 2021-03-10 2:51 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 08/11] PM / devfreq: check get_dev_status in devfreq_update_stats Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 16:02 ` Chanwoo Choi 2021-03-09 16:02 ` Chanwoo Choi 2021-03-09 16:20 ` Chanwoo Choi 2021-03-09 16:20 ` Chanwoo Choi 2021-03-10 3:00 ` Dong Aisheng 2021-03-10 3:00 ` Dong Aisheng 2021-03-11 7:01 ` Chanwoo Choi 2021-03-11 7:01 ` Chanwoo Choi 2021-03-09 12:58 ` [PATCH 09/11] PM / devfreq: governor: optimize simpleondemand get_target_freq Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 16:09 ` Chanwoo Choi 2021-03-09 16:09 ` Chanwoo Choi 2021-03-10 3:02 ` Dong Aisheng 2021-03-10 3:02 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 10/11] PM / devfreq: imx8m-ddrc: remove imx8m_ddrc_get_dev_status Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 16:22 ` Chanwoo Choi 2021-03-09 16:22 ` Chanwoo Choi 2021-03-09 12:58 ` [PATCH 11/11] PM / devfreq: imx8m-ddrc: drop polling_ms Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 16:23 ` Chanwoo Choi 2021-03-09 16:23 ` Chanwoo Choi 2021-03-10 3:03 ` Dong Aisheng 2021-03-10 3:03 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 00/11] PM / devfreq: a few small fixes and improvements Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 01/11] doc: ABI: devfreq: remove invalid central_polling description Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 02/11] PM / devfreq: remove the invalid description for get_target_freq Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 03/11] PM / devfreq: fix the wrong set_freq path for userspace governor Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 04/11] PM / devfreq: bail out early if no freq changes in devfreq_set_target Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 05/11] PM / devfreq: use more accurate returned new_freq as resume_freq Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 06/11] PM / devfreq: drop the unnecessary low variable initialization Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng [this message] 2021-03-09 12:58 ` [PATCH 07/11] PM / devfreq: check get_dev_status before start monitor Dong Aisheng 2021-03-09 12:58 ` [PATCH 08/11] PM / devfreq: check get_dev_status in devfreq_update_stats Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 09/11] PM / devfreq: governor: optimize simpleondemand get_target_freq Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 10/11] PM / devfreq: imx8m-ddrc: remove imx8m_ddrc_get_dev_status Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng 2021-03-09 12:58 ` [PATCH 11/11] PM / devfreq: imx8m-ddrc: drop polling_ms Dong Aisheng 2021-03-09 12:58 ` Dong Aisheng
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