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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>
hifive-unleashed-5.1
Robin Murphy 2017-11-15 12:50:06 +00:00 committed by Rob Herring
parent aa25e446ce
commit c545f637f8
1 changed files with 1 additions and 1 deletions
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2
drivers/of/of_pci.c
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@ -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;
}