perf: Don't use -ENOSPC for out of PMU resources

People (Linus) objected to using -ENOSPC to signal not having enough
resources on the PMU to satisfy the request. Use -EINVAL.

Requested-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-xv8geaz2zpbjhlx0svmpp28n@git.kernel.org
[ merged to newer kernel, fixed up MIPS impact ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 4 insertions, 4 deletions

diff --git a/arch/mips/kernel/perf_event_mipsxx.c b/arch/mips/kernel/perf_event_mipsxx.c
index 4f2971bcf8e5..315fc0b250f8 100644
--- a/arch/mips/kernel/perf_event_mipsxx.c
+++ b/arch/mips/kernel/perf_event_mipsxx.c
@@ -623,7 +623,7 @@ static int mipspmu_event_init(struct perf_event *event)
         if (!atomic_inc_not_zero(&active_events)) {
                 if (atomic_read(&active_events) > MIPS_MAX_HWEVENTS) {
                         atomic_dec(&active_events);
-                        return -ENOSPC;
+                        return -EINVAL;
                 }
 
                 mutex_lock(&pmu_reserve_mutex);
@@ -732,15 +732,15 @@ static int validate_group(struct perf_event *event)
         memset(&fake_cpuc, 0, sizeof(fake_cpuc));
 
         if (!validate_event(&fake_cpuc, leader))
-                return -ENOSPC;
+                return -EINVAL;
 
         list_for_each_entry(sibling, &leader->sibling_list, group_entry) {
                 if (!validate_event(&fake_cpuc, sibling))
-                        return -ENOSPC;
+                        return -EINVAL;
         }
 
         if (!validate_event(&fake_cpuc, event))
-                return -ENOSPC;
+                return -EINVAL;
 
         return 0;
 }