linux-kernel - [RFC 3/3] PCI/PM: Disable PME poll for PCIe devices

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Message-Id: <1347872076-5260-4-git-send-email-ying.huang@intel.com>
Date:	Mon, 17 Sep 2012 16:54:36 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-pm@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	Huang Ying <ying.huang@...el.com>
Subject: [RFC 3/3] PCI/PM: Disable PME poll for PCIe devices

PME poll is not necessary for PCIe devices, because PCIe devices use
in-band PME message and IRQ on PCIe port to report PME.

PME poll is useful for PCI devices.  Because for PCI devices, PME is
reported via a side-band PME# line and some platform logic, and the
platform logic is often missing on many systems.

Signed-off-by: Huang Ying <ying.huang@...el.com>
---
 drivers/pci/pcie/pme.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/pci/pcie/pme.c
+++ b/drivers/pci/pcie/pme.c
@@ -313,6 +313,7 @@ static int pcie_pme_set_native(struct pc
 
 	device_set_run_wake(&dev->dev, true);
 	dev->pme_interrupt = true;
+	dev->pme_poll = false;
 	return 0;
 }
 
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