From: Konstantin Khlebnikov <khlebnikov@openvz.org>
To: e1000-devel@lists.sourceforge.net, linux-pci@vger.kernel.org,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
linux-kernel@vger.kernel.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Subject: [PATCH v2 3/7] PCI: catch enable-counter underflows
Date: Mon, 04 Feb 2013 15:56:01 +0400 [thread overview]
Message-ID: <20130204115601.5569.27640.stgit@zurg> (raw)
In-Reply-To: <20130204115246.5569.85829.stgit@zurg>
This patch adds single WARN_ONCE() check for catching 'enable_cnt' imbalances.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: linux-pci@vger.kernel.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/pci/pci.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 5cb5820..ff93f8f 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1401,6 +1401,9 @@ pci_disable_device(struct pci_dev *dev)
if (dr)
dr->enabled = 0;
+ dev_WARN_ONCE(&dev->dev, atomic_read(&dev->enable_cnt) <= 0,
+ "enable counter underflow");
+
if (atomic_sub_return(1, &dev->enable_cnt) != 0)
return;
next prev parent reply other threads:[~2013-02-04 11:56 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-04 11:55 [PATCH v2 0/7] pci/e1000e: return runtime-pm back to work Konstantin Khlebnikov
2013-02-04 11:55 ` [PATCH v2 1/7] e1000e: fix pci-device enable-counter balance Konstantin Khlebnikov
2013-02-04 11:55 ` [PATCH v2 2/7] PCI: don't touch enable_cnt in pci_device_shutdown() Konstantin Khlebnikov
2013-02-04 22:20 ` Khalid Aziz
2013-02-04 23:13 ` Bjorn Helgaas
2013-02-05 15:28 ` Khalid Aziz
2013-02-05 19:22 ` Bjorn Helgaas
2013-02-06 0:21 ` Khalid Aziz
2013-02-04 11:56 ` Konstantin Khlebnikov [this message]
2013-02-04 11:56 ` [PATCH v2 4/7] PCI/PM: clear state_saved during suspend Konstantin Khlebnikov
2013-02-04 11:56 ` [PATCH v2 5/7] e1000e: fix runtime power management transitions Konstantin Khlebnikov
2013-02-04 11:56 ` [PATCH v2 6/7] PCI/PM: warn about incomplete actions in ->runtime_suspend() callback Konstantin Khlebnikov
2013-02-04 20:22 ` Rafael J. Wysocki
2013-02-04 20:57 ` Konstantin Khlebnikov
2013-02-04 11:56 ` [PATCH v2 7/7] e1000e: fix accessing to suspended device Konstantin Khlebnikov
2013-02-04 20:23 ` [PATCH v2 0/7] pci/e1000e: return runtime-pm back to work Rafael J. Wysocki
2013-02-12 0:34 ` Bjorn Helgaas
2013-02-12 0:43 ` Bjorn Helgaas
2013-02-12 20:27 ` Rafael J. Wysocki
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