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From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Linux PM list <linux-pm@vger.kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linux PCI <linux-pci@vger.kernel.org>,
	Dmitry Torokhov <dtor@google.com>,
	Aubrey Li <aubrey.li@intel.com>
Subject: [PATCH 06/13] genirq: Avoid double loop on suspend
Date: Mon, 01 Sep 2014 16:23:26 +0200	[thread overview]
Message-ID: <4587460.iSV9EpUBUu@vostro.rjw.lan> (raw)
In-Reply-To: <2516134.pmOxkEuOOy@vostro.rjw.lan>

From: Thomas Gleixner <tglx@linutronix.de>

We can synchronize the suspended interrupts right away. No need for an
extra loop.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 kernel/irq/pm.c |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

Index: linux/kernel/irq/pm.c
===================================================================
--- linux.orig/kernel/irq/pm.c
+++ linux/kernel/irq/pm.c
@@ -49,10 +49,10 @@ void irq_pm_remove_action(struct irq_des
 		desc->no_suspend_depth--;
 }
 
-static void suspend_device_irq(struct irq_desc *desc, int irq)
+static bool suspend_device_irq(struct irq_desc *desc, int irq)
 {
 	if (!desc->action || desc->no_suspend_depth)
-		return;
+		return false;
 
 	desc->istate |= IRQS_SUSPENDED;
 	__disable_irq(desc, irq);
@@ -65,6 +65,7 @@ static void suspend_device_irq(struct ir
 	 */
 	if (irq_desc_get_chip(desc)->flags & IRQCHIP_MASK_ON_SUSPEND)
 		mask_irq(desc);
+	return true;
 }
 
 /**
@@ -86,15 +87,15 @@ void suspend_device_irqs(void)
 
 	for_each_irq_desc(irq, desc) {
 		unsigned long flags;
+		bool sync;
 
 		raw_spin_lock_irqsave(&desc->lock, flags);
-		suspend_device_irq(desc, irq);
+		sync = suspend_device_irq(desc, irq);
 		raw_spin_unlock_irqrestore(&desc->lock, flags);
-	}
 
-	for_each_irq_desc(irq, desc)
-		if (desc->istate & IRQS_SUSPENDED)
+		if (sync)
 			synchronize_irq(irq);
+	}
 }
 EXPORT_SYMBOL_GPL(suspend_device_irqs);
 


  parent reply	other threads:[~2014-09-01 14:13 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-11 13:56 [PATCH 0/6 v2] irq / PM: Shared IRQs vs IRQF_NO_SUSPEND and suspend-to-idle wakeup interrupts Rafael J. Wysocki
2014-08-11 13:58 ` [PATCH 1/6 v2] PM / sleep: Mechanism for aborting system suspends unconditionally Rafael J. Wysocki
2014-08-11 13:59 ` [PATCH 2/6 v2] irq / PM: Make IRQF_NO_SUSPEND work with shared interrupts Rafael J. Wysocki
2014-08-11 14:00 ` [PATCH 3/6 v2] irq / PM: Make wakeup interrupts work with suspend-to-idle Rafael J. Wysocki
2014-08-11 14:01 ` [PATCH 4/6 v2] x86 / PM: Set IRQCHIP_SKIP_SET_WAKE for IOAPIC IRQ chip objects Rafael J. Wysocki
2014-08-11 14:02 ` [PATCH 5/6 v2] PCI / PM: Make PCIe PME interrupts wake up from suspend-to-idle Rafael J. Wysocki
2014-08-11 14:03 ` [PATCH 6/6 v2] irq / PM: Document rules related to system suspend and interrupts Rafael J. Wysocki
2014-08-26 23:46 ` [PATCH 0/5 v3] irq / PM: Suspend-to-idle wakeup interrupts Rafael J. Wysocki
2014-08-26 23:47   ` [PATCH 1/5 v3] PM / sleep: Mechanism for aborting system suspends unconditionally Rafael J. Wysocki
2014-08-26 23:49   ` [PATCH 2/5 v3] irq / PM: Make wakeup interrupts work with suspend-to-idle Rafael J. Wysocki
2014-08-27 20:32     ` Thomas Gleixner
2014-08-27 22:51       ` Rafael J. Wysocki
2014-08-28  9:23         ` Thomas Gleixner
2014-08-29  1:51           ` Rafael J. Wysocki
2014-08-26 23:50   ` [PATCH 3/5 v3] x86 / PM: Set IRQCHIP_SKIP_SET_WAKE for IOAPIC IRQ chip objects Rafael J. Wysocki
2014-08-26 23:51   ` [PATCH 4/5 v3] PCI / PM: Make PCIe PME interrupts wake up from suspend-to-idle Rafael J. Wysocki
2014-08-26 23:52   ` [PATCH 5/5 v3] irq / PM: Document rules related to system suspend and interrupts Rafael J. Wysocki
2014-08-28 22:44   ` [PATCH 0/5 v3] irq / PM: Suspend-to-idle wakeup interrupts Thomas Gleixner
2014-08-29  0:54     ` Rafael J. Wysocki
2014-08-29  1:09       ` Thomas Gleixner
2014-09-01 14:18   ` [PATCH 00/13] genirq / PM: Wakeup interrupts handling rework (related to suspend-to-idle) Rafael J. Wysocki
2014-09-01 14:19     ` [PATCH 01/13] PM / sleep: Mechanism for aborting system suspends unconditionally Rafael J. Wysocki
2014-09-01 14:20     ` [PATCH 02/13] genirq: Move suspend/resume logic into irq/pm code Rafael J. Wysocki
2014-09-01 14:21     ` [PATCH 03/13] genirq: Add sanity checks for PM options on shared interrupt lines Rafael J. Wysocki
2014-09-01 14:22     ` [PATCH 04/13] genirq: Make use of pm misfeature accounting Rafael J. Wysocki
2014-09-01 14:22     ` [PATCH 05/13] genirq: Move MASK_ON_SUSPEND handling into suspend_device_irqs() Rafael J. Wysocki
2014-09-01 14:23     ` Rafael J. Wysocki [this message]
2014-09-01 14:24     ` [PATCH 07/13] genirq: Distangle edge handler entry Rafael J. Wysocki
2014-09-01 14:24     ` [PATCH 08/13] genirq: Create helper for flow handler entry check Rafael J. Wysocki
2014-09-01 14:26     ` [PATCH 09/13] genirq: Mark wakeup sources as armed on suspend Rafael J. Wysocki
2014-09-01 14:27     ` [PATCH 10/13] genirq: Simplify wakeup mechanism Rafael J. Wysocki
2014-09-01 14:28     ` [PATCH 11/13] x86 / PM: Set IRQCHIP_SKIP_SET_WAKE for IOAPIC IRQ chip objects Rafael J. Wysocki
2014-09-01 14:28     ` [PATCH 12/13] PCI / PM: Make PCIe PME interrupts wake up from suspend-to-idle Rafael J. Wysocki
2014-09-01 14:29     ` [PATCH 13/13] PM / genirq: Document rules related to system suspend and interrupts Rafael J. Wysocki

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