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perf/x86/amd: Do not print an error when the device is not present 

As Linus said its not an error to not have an AMD IOMMU; esp.
when you're not even running on an AMD platform.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Link: http://lkml.kernel.org/r/20130703075542.GF23916@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2013-07-03 09:55:42 +02:00 committed by Ingo Molnar
parent 7c6809ff2b
commit 100ac53315
1 changed files with 1 additions and 3 deletions
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4
arch/x86/kernel/cpu/perf_event_amd_iommu.c
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@ -491,10 +491,8 @@ static struct perf_amd_iommu __perf_iommu = {
static __init int amd_iommu_pc_init(void)
{
/* Make sure the IOMMU PC resource is available */
if (!amd_iommu_pc_supported()) {
pr_err("perf: amd_iommu PMU not installed. No support!\n");
if (!amd_iommu_pc_supported())
return -ENODEV;
}
_init_perf_amd_iommu(&__perf_iommu, "amd_iommu");