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x86/apic/es7000+summit: Always make valid apicid from a cpumask 

In case of invalid parameters cpu_mask_to_apicid_and() might
return apicid value of 0 (on Summit) or a uninitialized value
(on ES7000), although it is supposed to return apicid of cpu-0
at least. Fix the operation to always return a valid apicid.

Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/20120614075026.GH3383@dhcp-26-207.brq.redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Alexander Gordeev 2012-06-14 09:50:27 +02:00 committed by Ingo Molnar
parent 49ad3fd483
commit 214e270b5f
2 changed files with 4 additions and 0 deletions
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2
arch/x86/kernel/apic/es7000_32.c
View File

@ -545,6 +545,8 @@ es7000_cpu_mask_to_apicid(const struct cpumask *cpumask, unsigned int *dest_id)
apicid = new_apicid;
round++;
}
if (!round)
return -EINVAL;
*dest_id = apicid;
return 0;
}

2
arch/x86/kernel/apic/summit_32.c
View File

@ -282,6 +282,8 @@ summit_cpu_mask_to_apicid(const struct cpumask *cpumask, unsigned int *dest_id)
apicid |= new_apicid;
round++;
}
if (!round)
return -EINVAL;
*dest_id = apicid;
return 0;
}