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[PATCH] x86_64 irq: Simplfiy the set_affinity logic.

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For some reason the code has been picking TARGET_CPUS when asked to
set the affinity to an empty set of cpus.  That is just silly it's
extra work.  Instead if there are no cpus to set the affinity to we
should just give up immediately.  That is simpler and a little more
intuitive.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Eric W. Biederman 2007-02-23 04:20:59 -07:00 committed by Linus Torvalds
parent a8c8a36736
commit 5ff5115efa
1 changed files with 3 additions and 9 deletions
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12
arch/x86_64/kernel/io_apic.c
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@ -244,9 +244,7 @@ static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
cpus_and(tmp, mask, cpu_online_map);
if (cpus_empty(tmp))
tmp = TARGET_CPUS;
cpus_and(mask, tmp, CPU_MASK_ALL);
return;
vector = assign_irq_vector(irq, mask, &tmp);
if (vector < 0)
@ -1890,9 +1888,7 @@ static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
cpus_and(tmp, mask, cpu_online_map);
if (cpus_empty(tmp))
tmp = TARGET_CPUS;
cpus_and(mask, tmp, CPU_MASK_ALL);
return;
vector = assign_irq_vector(irq, mask, &tmp);
if (vector < 0)
@ -1985,9 +1981,7 @@ static void set_ht_irq_affinity(unsigned int irq, cpumask_t mask)
cpus_and(tmp, mask, cpu_online_map);
if (cpus_empty(tmp))
tmp = TARGET_CPUS;
cpus_and(mask, tmp, CPU_MASK_ALL);
return;
vector = assign_irq_vector(irq, mask, &tmp);
if (vector < 0)