From 4209ab098c61b1a9684bb4d3fc287352fc2438c3 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@sunset.davemloft.net>
Date: Mon, 15 Oct 2007 20:45:32 -0700
Subject: [PATCH] [SPARC64]: Check of_get_property() return in
pci_determine_mem_io_space().
If the PCI controller lacks the 'ranges' property nothing
is going to work.
Noticed by Al Viro.
Signed-off-by: David S. Miller <davem@davemloft.net>
---
arch/sparc64/kernel/pci_common.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/sparc64/kernel/pci_common.c b/arch/sparc64/kernel/pci_common.c
index c76bfbb7da085..923e0bcc3bfdb 100644
--- a/arch/sparc64/kernel/pci_common.c
+++ b/arch/sparc64/kernel/pci_common.c
@@ -396,6 +396,13 @@ void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
saw_mem = saw_io = 0;
pbm_ranges = of_get_property(pbm->prom_node, "ranges", &i);
+ if (!pbm_ranges) {
+ prom_printf("PCI: Fatal error, missing PBM ranges property "
+ " for %s\n",
+ pbm->name);
+ prom_halt();
+ }
+
num_pbm_ranges = i / sizeof(*pbm_ranges);
for (i = 0; i < num_pbm_ranges; i++) {
--
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