powerpc/eeh: Add eeh_dev to the cache during boot

commit f8f7d63fd9 ("powerpc/eeh: Trace eeh
device from I/O cache") broke EEH on pseries for devices that were
present during boot and have not been hotplugged/DLPARed.

eeh_check_failure will get the eeh_dev from the cache, and will get
NULL. eeh_addr_cache_build adds the addresses to the cache, but eeh_dev
for the giving pci_device is not set yet. Just reordering the call to
eeh_addr_cache_insert_dev works fine. The ordering is similar to the one
in eeh_add_device_late.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/pseries/eeh_cache.c

@@ -294,8 +294,6 @@ void __init eeh_addr_cache_build(void)
 	spin_lock_init(&pci_io_addr_cache_root.piar_lock);
 
 	for_each_pci_dev(dev) {
-		eeh_addr_cache_insert_dev(dev);
-
 		dn = pci_device_to_OF_node(dev);
 		if (!dn)
 			continue;
@@ -308,6 +306,8 @@ void __init eeh_addr_cache_build(void)
 		dev->dev.archdata.edev = edev;
 		edev->pdev = dev;
 
+		eeh_addr_cache_insert_dev(dev);
+
 		eeh_sysfs_add_device(dev);
 	}