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authorPaul Mackerras <paulus@samba.org>2010-05-08 20:58:00 +1000
committerIngo Molnar <mingo@elte.hu>2010-05-08 13:16:55 +0200
commit6e85158cf5a2385264316870256fb6ad681156a0 (patch)
tree39d5a0c81c4cc54c8051a9f62b587f17b0a2077a /kernel/perf_event.c
parented82702155b6343727ee732f7eae6d72e8b453fe (diff)
downloadop-kernel-dev-6e85158cf5a2385264316870256fb6ad681156a0.zip
op-kernel-dev-6e85158cf5a2385264316870256fb6ad681156a0.tar.gz
perf_event: Make software events work again
Commit 6bde9b6ce0127e2a56228a2071536d422be31336 ("perf: Add group scheduling transactional APIs") added code to allow a group to be scheduled in a single transaction. However, it introduced a bug in handling events whose pmu does not implement transactions -- at the end of scheduling in the events in the group, in the non-transactional case the code now falls through to the group_error label, and proceeds to unschedule all the events in the group and return failure. This fixes it by returning 0 (success) in the non-transactional case. Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: eranian@gmail.com LKML-Reference: <20100508105800.GB10650@brick.ozlabs.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/perf_event.c')
-rw-r--r--kernel/perf_event.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index bb06382..180151f 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -664,13 +664,13 @@ group_sched_in(struct perf_event *group_event,
}
}
- if (txn) {
- ret = pmu->commit_txn(pmu);
- if (!ret) {
- pmu->cancel_txn(pmu);
+ if (!txn)
+ return 0;
- return 0;
- }
+ ret = pmu->commit_txn(pmu);
+ if (!ret) {
+ pmu->cancel_txn(pmu);
+ return 0;
}
group_error:
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