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[SPARC]: Fix EBUS use of uninitialized variable.

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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>
This commit is contained in:
David S. Miller 2007-09-27 13:09:28 -07:00
parent ff0ce6845b
commit 9c908f97d0
2 changed files with 6 additions and 1 deletions
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2
arch/sparc/kernel/ebus.c
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@ -156,6 +156,8 @@ void __init fill_ebus_device(struct device_node *dp, struct linux_ebus_device *d
dev->prom_node = dp;
regs = of_get_property(dp, "reg", &len);
if (!regs)
len = 0;
if (len % sizeof(struct linux_prom_registers)) {
prom_printf("UGH: proplen for %s was %d, need multiple of %d\n",
dev->prom_node->name, len,

5
arch/sparc64/kernel/ebus.c
View File

@ -375,7 +375,10 @@ static void __init fill_ebus_device(struct device_node *dp, struct linux_ebus_de
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++)