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powerpc/eeh: Cache normal BARs, not windows or IOV BARs

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This restricts the EEH address cache to use only the first 7 BARs. This
makes __eeh_addr_cache_insert_dev() ignore PCI bridge window and IOV BARs.
As the result of this change, eeh_addr_cache_get_dev() will return VFs from
VF's resource addresses instead of parent PFs.

This also removes PCI bridge check as we limit __eeh_addr_cache_insert_dev()
to 7 BARs and this effectively excludes PCI bridges from being cached.

Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Wei Yang 2016-03-04 10:53:06 +11:00 committed by Michael Ellerman
parent 971427f582
commit 51c0e87e9a
1 changed files with 5 additions and 6 deletions
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11
arch/powerpc/kernel/eeh_cache.c
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@ -195,8 +195,11 @@ static void __eeh_addr_cache_insert_dev(struct pci_dev *dev)
return; return;
} }
/* Walk resources on this device, poke them into the tree */ /*
for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { * Walk resources on this device, poke the first 7 (6 normal BAR and 1
* ROM BAR) into the tree.
*/
for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
resource_size_t start = pci_resource_start(dev,i); resource_size_t start = pci_resource_start(dev,i);
resource_size_t end = pci_resource_end(dev,i); resource_size_t end = pci_resource_end(dev,i);
unsigned long flags = pci_resource_flags(dev,i); unsigned long flags = pci_resource_flags(dev,i);
@ -222,10 +225,6 @@ void eeh_addr_cache_insert_dev(struct pci_dev *dev)
{ {
unsigned long flags; unsigned long flags;
/* Ignore PCI bridges */
if ((dev->class >> 16) == PCI_BASE_CLASS_BRIDGE)
return;
spin_lock_irqsave(&pci_io_addr_cache_root.piar_lock, flags); spin_lock_irqsave(&pci_io_addr_cache_root.piar_lock, flags);
__eeh_addr_cache_insert_dev(dev); __eeh_addr_cache_insert_dev(dev);
spin_unlock_irqrestore(&pci_io_addr_cache_root.piar_lock, flags); spin_unlock_irqrestore(&pci_io_addr_cache_root.piar_lock, flags);