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authorRobin Murphy <robin.murphy@arm.com>2017-11-15 12:50:06 +0000
committerRob Herring <robh@kernel.org>2017-11-16 11:01:14 -0600
commitc545f637f81ebab88c257a243083a879af0b85b7 (patch)
tree46e46454d7729e1326fb16130f468c96f58ac24b /drivers/of
parentaa25e446ce76c37bfd75ac06598c316af94e9a26 (diff)
of/pci: Fix theoretical NULL dereference
In the (relatively mechanical) process of adapting the RID-mapping code to put the resulting ID in an output argument rather than the funtion return value, we ended up with the debug print using the argument pointer rather than the local value, which potentially defeats the earlier NULL check. Fixes: 987068fcbdb7: "of/irq: Break out msi-map lookup (again)" Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/of_pci.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
index e9ec931f5b9a..a7b1cb6c2f65 100644
--- a/drivers/of/of_pci.c
+++ b/drivers/of/of_pci.c
@@ -374,7 +374,7 @@ int of_pci_map_rid(struct device_node *np, u32 rid,
pr_debug("%pOF: %s, using mask %08x, rid-base: %08x, out-base: %08x, length: %08x, rid: %08x -> %08x\n",
np, map_name, map_mask, rid_base, out_base,
- rid_len, rid, *id_out);
+ rid_len, rid, masked_rid - rid_base + out_base);
return 0;
}