[tip:perf/urgent] perf top: Fix --delay_secs 0 division by zero

[tip-bot for Tim Blechmann <tim@klingt.org>]

Commit-ID:  dc79959aaf80e518741657a702fa2727c86c1189
Gitweb:     http://git.kernel.org/tip/dc79959aaf80e518741657a702fa2727c86c1189
Author:     Tim Blechmann <tim@klingt.org>
AuthorDate: Sat, 17 Oct 2009 18:08:29 +0200
Committer:  Ingo Molnar <mingo@elte.hu>
CommitDate: Mon, 19 Oct 2009 09:52:39 +0200

perf top: Fix --delay_secs 0 division by zero

Add delay_secs sanity check to handle_keypress,
this fixes a division by zero crash.

Signed-off-by: Tim Blechmann <tim@klingt.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4AD9EBFD.106@klingt.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 tools/perf/builtin-top.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 37512e9..a1b1d10 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -686,6 +686,8 @@ static void handle_keypress(int c)
 	switch (c) {
 		case 'd':
 			prompt_integer(&delay_secs, "Enter display delay");
+			if (delay_secs < 1)
+				delay_secs = 1;
 			break;
 		case 'e':
 			prompt_integer(&print_entries, "Enter display entries (lines)");