x86/PCI: add spinlock held check to 'pcibios_fwaddrmap_lookup()'
'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>
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index 33e6a0b..831971e 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -57,6 +57,8 @@
{
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;