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27 March 2024, 02:37:15 UTC
Revision d797396f3387c5be8f63fcc8e9be98bb884ea86a authored by Anton Blanchard on 06 January 2010, 04:55:13 UTC, committed by Ralf Baechle on 12 January 2010, 17:19:37 UTC 
MIPS: cpumask_of_node() should handle -1 as a node
 
pcibus_to_node can return -1 if we cannot determine which node a pci bus
is on. If passed -1, cpumask_of_node will negatively index the lookup array
and pull in random data:

# cat /sys/devices/pci0000:00/0000:00:01.0/local_cpus
00000000,00000003,00000000,00000000
# cat /sys/devices/pci0000:00/0000:00:01.0/local_cpulist
64-65

Change cpumask_of_node to check for -1 and return cpu_all_mask in this
case:

# cat /sys/devices/pci0000:00/0000:00:01.0/local_cpus
ffffffff,ffffffff,ffffffff,ffffffff
# cat /sys/devices/pci0000:00/0000:00:01.0/local_cpulist
0-127

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andrew Morton <akpm@linux-foundation.org>
Patchwork: http://patchwork.linux-mips.org/patch/831/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
1 parent 0e8a1d8
History
Tip revision: d797396f3387c5be8f63fcc8e9be98bb884ea86a authored by Anton Blanchard on 06 January 2010, 04:55:13 UTC
MIPS: cpumask_of_node() should handle -1 as a node
Tip revision: d797396
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