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[V4,04/11] powerpc/eeh: cache address range just for normal device

Message ID 1431668786-30371-5-git-send-email-weiyang@linux.vnet.ibm.com (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show

Commit Message

Wei Yang May 15, 2015, 5:46 a.m. UTC 
The address cache is used to find the related eeh_dev for a given MMIO
address.  From the definition of pci_dev.resource[], it keeps MMIO address
in following order: 6 normal BAR, ROM BAR, 6 IOV BAR, 4 Bridge window.

In the address cache, first it doesn't cache bridge device, second the IOV
BAR range should map to their own VFs separately. This means it just need
to cache the first 7 BARs for a normal device.

This patch restricts the address cache to save the first 7 BARs for a pci
device.

Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
---
 arch/powerpc/kernel/eeh_cache.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/powerpc/kernel/eeh_cache.c b/arch/powerpc/kernel/eeh_cache.c
index a1e86e1..f0ce2a3 100644
--- a/arch/powerpc/kernel/eeh_cache.c
+++ b/arch/powerpc/kernel/eeh_cache.c
@@ -196,7 +196,7 @@  static void __eeh_addr_cache_insert_dev(struct pci_dev *dev)
 	}
 
 	/* Walk resources on this device, poke them into the tree */
-	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
+	for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
 		resource_size_t start = pci_resource_start(dev,i);
 		resource_size_t end = pci_resource_end(dev,i);
 		unsigned long flags = pci_resource_flags(dev,i);