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[POWERPC] mpc5200-fec: Fix possible NULL dereference in mdio driver 

If the reg property is missing from the phy node (unlikely, but possible),
then the kernel will oops with a NULL pointer dereference.  This fixes
it by checking the pointer first.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Grant Likely 2008-03-22 14:20:29 +11:00 committed by Paul Mackerras
parent 1428a9fa58
commit b8c19eb16a
1 changed files with 2 additions and 1 deletions
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3
drivers/net/fec_mpc52xx_phy.c
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@ -109,7 +109,8 @@ static int mpc52xx_fec_mdio_probe(struct of_device *of, const struct of_device_i
int irq = irq_of_parse_and_map(child, 0);
if (irq != NO_IRQ) {
const u32 *id = of_get_property(child, "reg", NULL);
bus->irq[*id] = irq;
if (id)
bus->irq[*id] = irq;
}
}