[06/13] powerpc/PCI: Keep resource idx order with bridge register number

Submitted by Yinghai Lu on April 21, 2017, 5:04 a.m.

Details

Message ID 20170421050500.13957-7-yinghai@kernel.org
State Changes Requested
Headers show

Commit Message

Yinghai Lu April 21, 2017, 5:04 a.m.
Same as sparc version.

Make resource with consistent sequence
like other arch or directly from pci_read_bridge_bases(),
even when non-pref mmio is missing, or out of ordering in firmware reporting.

Just hold i = 1 for non pref mmio, and i = 2 for pref mmio.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: linuxppc-dev@lists.ozlabs.org
---
 arch/powerpc/kernel/pci_of_scan.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Patch hide | download patch | download mbox

diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c
index ea3d981..9581e00 100644
--- a/arch/powerpc/kernel/pci_of_scan.c
+++ b/arch/powerpc/kernel/pci_of_scan.c
@@ -252,7 +252,7 @@  void of_scan_pci_bridge(struct pci_dev *dev)
 		bus->resource[i] = res;
 		++res;
 	}
-	i = 1;
+	i = 3;
 	for (; len >= 32; len -= 32, ranges += 8) {
 		flags = pci_parse_of_flags(of_read_number(ranges, 1), 1);
 		size = of_read_number(&ranges[6], 2);
@@ -265,6 +265,12 @@  void of_scan_pci_bridge(struct pci_dev *dev)
 				       " for bridge %s\n", node->full_name);
 				continue;
 			}
+		} else if ((flags & IORESOURCE_PREFETCH) &&
+			   !bus->resource[2]->flags) {
+			res = bus->resource[2];
+		} else if (((flags & (IORESOURCE_MEM | IORESOURCE_PREFETCH)) ==
+			    IORESOURCE_MEM) && !bus->resource[1]->flags) {
+			res = bus->resource[1];
 		} else {
 			if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) {
 				printk(KERN_ERR "PCI: too many memory ranges"