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authorGrant Likely <grant.likely@secretlab.ca>2008-03-21 23:20:29 -0400
committerPaul Mackerras <paulus@samba.org>2008-03-24 02:55:48 -0400
commitb8c19eb16a7e6df57d0f6d67e42ce026e5d5930b (patch)
tree5a8fd8fef3283cafbbe1419ca296eaa293d07afa /drivers/net
parent1428a9fa586cb80acf98289f797f58b8bd662598 (diff)
[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>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/fec_mpc52xx_phy.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/fec_mpc52xx_phy.c b/drivers/net/fec_mpc52xx_phy.c
index 1837584c4504..6a3ac4ea97e9 100644
--- a/drivers/net/fec_mpc52xx_phy.c
+++ b/drivers/net/fec_mpc52xx_phy.c
@@ -109,7 +109,8 @@ static int mpc52xx_fec_mdio_probe(struct of_device *of, const struct of_device_i
109 int irq = irq_of_parse_and_map(child, 0); 109 int irq = irq_of_parse_and_map(child, 0);
110 if (irq != NO_IRQ) { 110 if (irq != NO_IRQ) {
111 const u32 *id = of_get_property(child, "reg", NULL); 111 const u32 *id = of_get_property(child, "reg", NULL);
112 bus->irq[*id] = irq; 112 if (id)
113 bus->irq[*id] = irq;
113 } 114 }
114 } 115 }
115 116