[SPARC]: Fix EBUS use of uninitialized variable.
If of_get_property() fails, it returns NULL and the 'len'
parameter is undefined. So we need to explicitly set len
to zero in such cases.
Noticed by Al Viro.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/ebus.c b/arch/sparc64/kernel/ebus.c
index bc9ae36..04ab81c 100644
--- a/arch/sparc64/kernel/ebus.c
+++ b/arch/sparc64/kernel/ebus.c
@@ -375,7 +375,10 @@
dev->num_addrs = 0;
dev->num_irqs = 0;
} else {
- (void) of_get_property(dp, "reg", &len);
+ const int *regs = of_get_property(dp, "reg", &len);
+
+ if (!regs)
+ len = 0;
dev->num_addrs = len / sizeof(struct linux_prom_registers);
for (i = 0; i < dev->num_addrs; i++)