[PATCH 3/5] perf kvm stat live: Fix perf_evlist__add_pollfd error handling

[Jiri Olsa <jolsa@kernel.org>]

With the interface changed in following commit:
  2171a9256862 tools lib fd array: Allow associating an integer cookie with each entry
the perf_evlist__add_pollfd function now returns the fd
position in the pollfd array.

We need to change this function's error check condition.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Milian Wolff <mail@milianw.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/builtin-kvm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index d8bf2271f4ea..663d6eda0822 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -928,12 +928,12 @@ static int kvm_events_live_report(struct perf_kvm_stat *kvm)
 		goto out;
 	}
 
-	if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd))
+	if (perf_evlist__add_pollfd(kvm->evlist, kvm->timerfd) < 0)
 		goto out;
 
 	nr_fds++;
 
-	if (perf_evlist__add_pollfd(kvm->evlist, fileno(stdin)))
+	if (perf_evlist__add_pollfd(kvm->evlist, fileno(stdin)) < 0)
 		goto out;
 
 	nr_stdin = nr_fds;
-- 
1.9.3