From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Bjorn Helgaas <bhelgaas@google.com>,
Linux PCI <linux-pci@vger.kernel.org>
Cc: Linux PM <linux-pm@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Subject: [PATCH] PCI / PM: Add dev_dbg() to print device suspend power states
Date: Sat, 30 Sep 2017 01:31:15 +0200 [thread overview]
Message-ID: <8776535.A6PtrVU7Ea@aspire.rjw.lan> (raw)
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
It sometimes is useful to know what power states the kernel thinks
it puts PCI devices into during system suspend, so add a dev_dbg()
statement for that.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/pci/pci-driver.c | 3 +++
1 file changed, 3 insertions(+)
Index: linux-pm/drivers/pci/pci-driver.c
===================================================================
--- linux-pm.orig/drivers/pci/pci-driver.c
+++ linux-pm/drivers/pci/pci-driver.c
@@ -798,6 +798,9 @@ static int pci_pm_suspend_noirq(struct d
pci_prepare_to_sleep(pci_dev);
}
+ dev_dbg(dev, "PCI PM: Suspend power state: %s\n",
+ pci_power_name(pci_dev->current_state));
+
pci_pm_set_unknown_state(pci_dev);
/*
next reply other threads:[~2017-09-29 23:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-29 23:31 Rafael J. Wysocki [this message]
2017-10-02 23:29 ` Bjorn Helgaas
2017-10-02 23:45 ` Rafael J. Wysocki
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