[PATCH 06/21] perf header: Stop using die() calls when processing tracing data

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>

The callers of this function (perf_event__process_tracing_data) already
handles a negative value return as error, so just use pr_err() to log
the problem and return -1 instead of panic'ing.

Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-eeeljnecpi0zi5s7ux1mzdv9@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/header.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index fccd69d..e17a8fe 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2921,16 +2921,22 @@ int perf_event__process_tracing_data(union perf_event *event,
 				 session->repipe);
 	padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
 
-	if (readn(session->fd, buf, padding) < 0)
-		die("reading input file");
+	if (readn(session->fd, buf, padding) < 0) {
+		pr_err("%s: reading input file", __func__);
+		return -1;
+	}
 	if (session->repipe) {
 		int retw = write(STDOUT_FILENO, buf, padding);
-		if (retw <= 0 || retw != padding)
-			die("repiping tracing data padding");
+		if (retw <= 0 || retw != padding) {
+			pr_err("%s: repiping tracing data padding", __func__);
+			return -1;
+		}
 	}
 
-	if (size_read + padding != size)
-		die("tracing data size mismatch");
+	if (size_read + padding != size) {
+		pr_err("%s: tracing data size mismatch", __func__);
+		return -1;
+	}
 
 	perf_evlist__prepare_tracepoint_events(session->evlist,
 					       session->pevent);
-- 
1.8.1.1.361.gec3ae6e

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/