[tip:perf/core] perf header: Display feature name on write failure

[tip-bot for Jiri Olsa]

Commit-ID:  0c2aff4c78e83f3185bf5affa434618815ab77bf
Gitweb:     http://git.kernel.org/tip/0c2aff4c78e83f3185bf5affa434618815ab77bf
Author:     Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Mon, 10 Oct 2016 09:38:02 +0200
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 24 Oct 2016 11:07:34 -0300

perf header: Display feature name on write failure

Display name of feature instead of just the number
during recording data.

Before:
  failed to write feature 13

Now:
  failed to write feature HEADER_CPU_TOPOLOGY

Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-k9d9trozi5kkx737cy8n5xh5@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/header.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index d6310c6..d89c9c7 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2290,7 +2290,7 @@ static int do_write_feat(int fd, struct perf_header *h, int type,
 
 		err = feat_ops[type].write(fd, h, evlist);
 		if (err < 0) {
-			pr_debug("failed to write feature %d\n", type);
+			pr_debug("failed to write feature %s\n", feat_ops[type].name);
 
 			/* undo anything written */
 			lseek(fd, (*p)->offset, SEEK_SET);