Commit fd6dceab authored Feb 04, 2013 by Konstantin Khlebnikov Committed by Bjorn Helgaas Feb 11, 2013

PCI: Catch attempts to disable already-disabled devices



Warn when disabling a device that has already been disabled.

[bhelgaas: message wording]
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent 7897e602

drivers/pci/pci.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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,
		"disabling already-disabled device");

		if (atomic_sub_return(1, &dev->enable_cnt) != 0)
		return;

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