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x86/PCI: add spinlock held check to 'pcibios_fwaddrmap_lookup()'

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'pcibios_fwaddrmap_lookup()' is used to maintain FW-assigned BIOS BAR
values for reinstatement when normal resource assignment attempts
fail and must be called with the 'pcibios_fwaddrmap_lock' spinlock
held.

This patch adds a WARN_ON notification if the spinlock is not currently
held by the caller.

Signed-off-by: Myron Stowe <myron.stowe@redhat.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Myron Stowe 2012-03-02 12:45:01 -07:00 committed by Jesse Barnes
parent 6748dcc269
commit 63ab387ca0
1 changed files with 2 additions and 0 deletions
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2
arch/x86/pci/i386.c
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@ -57,6 +57,8 @@ static struct pcibios_fwaddrmap *pcibios_fwaddrmap_lookup(struct pci_dev *dev)
{
struct pcibios_fwaddrmap *map;
WARN_ON(!spin_is_locked(&pcibios_fwaddrmap_lock));
list_for_each_entry(map, &pcibios_fwaddrmappings, list)
if (map->dev == dev)
return map;