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From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Linux PM <linux-pm@vger.kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Alan Stern <stern@rowland.harvard.edu>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Johan Hovold <johan@kernel.org>,
	Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
	Jon Hunter <jonathanh@nvidia.com>
Subject: [PATCH v1 04/10] PM: runtime: Drop status check from pm_runtime_force_resume()
Date: Tue, 11 Feb 2025 22:07:52 +0100	[thread overview]
Message-ID: <6038511.MhkbZ0Pkbq@rjwysocki.net> (raw)
In-Reply-To: <2314745.iZASKD2KPV@rjwysocki.net>

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Since pm_runtime_force_resume() requires pm_runtime_force_suspend() to
be called before it on the same device, the runtime PM status of that
device is RPM_SUSPENDED when it is called unless the device's runtime
PM status is changed somewhere else in the meantime.

However, even if that happens, the power.needs_force_resume
check is still required to pass and that flag is only set by
pm_runtime_force_suspend() and it is cleared at the end of
pm_runtime_force_resume(), so it cannot be taken into account
twice in a row.

Accordingly, the pm_runtime_status_suspended(dev) check in
pm_runtime_force_resume() is redundant, so drop it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/base/power/runtime.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -1963,7 +1963,7 @@
 	int (*callback)(struct device *);
 	int ret = 0;
 
-	if (!pm_runtime_status_suspended(dev) || !dev->power.needs_force_resume)
+	if (!dev->power.needs_force_resume)
 		goto out;
 
 	/*




  parent reply	other threads:[~2025-02-11 21:25 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-02-11 21:01 [PATCH v1 00/10] PM: Make the core and pm_runtime_force_suspend/resume() agree more Rafael J. Wysocki
2025-02-11 21:02 ` [PATCH v1 01/10] PM: runtime: Introduce pm_runtime_no_support() Rafael J. Wysocki
2025-02-11 21:03 ` [PATCH v1 02/10] PM: sleep: core: Use pm_runtime_no_support() during set_active updates Rafael J. Wysocki
2025-02-11 21:05 ` [PATCH v1 03/10] PM: runtime: Use pm_runtime_no_support() in pm_runtime_force_suspend() Rafael J. Wysocki
2025-02-11 21:07 ` Rafael J. Wysocki [this message]
2025-02-11 21:09 ` [PATCH v1 05/10] PM: runtime: Do not enable wakeup IRQs during system resume Rafael J. Wysocki
2025-02-11 21:10 ` [PATCH v1 06/10] PM: sleep: Adjust check before setting power.must_resume Rafael J. Wysocki
2025-02-11 21:11 ` [PATCH v1 07/10] PM: sleep: Clear the power.set_active upfront Rafael J. Wysocki
2025-02-11 21:19 ` [PATCH v1 08/10] PM: sleep: Make pm_runtime_force_resume() look at power.set_active Rafael J. Wysocki
2025-02-11 21:21 ` [PATCH v1 09/10] PM: sleep: Propagate power.set_active in dependency chains Rafael J. Wysocki
2025-02-11 21:25 ` [PATCH v1 10/10] PM: runtime: Discover the lack of runtime PM support Rafael J. Wysocki
2025-02-12 11:14   ` Rafael J. Wysocki
2025-02-12  9:12 ` [PATCH v1 00/10] PM: Make the core and pm_runtime_force_suspend/resume() agree more Ulf Hansson
2025-02-12 10:59   ` Rafael J. Wysocki
2025-02-12 11:33     ` Rafael J. Wysocki
2025-02-12 11:36       ` Rafael J. Wysocki
2025-02-12 15:14       ` Ulf Hansson
2025-02-12 17:05         ` Rafael J. Wysocki
2025-02-12 19:04           ` Rafael J. Wysocki
2025-02-13 13:37             ` Ulf Hansson
2025-02-13 20:42               ` Rafael J. Wysocki
2025-02-13 13:10           ` Ulf Hansson
2025-02-13 20:17             ` Rafael J. Wysocki
2025-02-14  9:55               ` Ulf Hansson
2025-02-15 12:32                 ` Rafael J. Wysocki

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