[tip:perf/urgent] perf probe: Check if *ptr2 is zero and not ptr2

[tip-bot for Colin Ian King]

Commit-ID:  ead1a57457c0324a167f3f9e3a70e26c2d75fb12
Gitweb:     http://git.kernel.org/tip/ead1a57457c0324a167f3f9e3a70e26c2d75fb12
Author:     Colin Ian King <colin.king@xxxxxxxxxxxxx>
AuthorDate: Mon, 3 Oct 2016 11:34:31 +0100
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 3 Oct 2016 11:24:12 -0300

perf probe: Check if *ptr2 is zero and not ptr2

Static anaylsis with cppcheck[1] detected an incorrect comparison:
[tools/perf/util/probe-event.c:216]: (warning) Char literal compared
with pointer 'ptr2'. Did you intend to dereference it?

Dereference ptr2 for the comparison to fix this.

1: https://sourceforge.net/p/cppcheck/wiki/Home/

Signed-off-by: Colin King <colin.king@xxxxxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Ravi Bangoria <ravi.bangoria@xxxxxxxxxxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Fixes: 35726d3a4ca9 ("perf probe: Fix to cut off incompatible chars from group name")
Link: http://lkml.kernel.org/r/20161003103431.18534-1-colin.king@xxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/probe-event.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index fcfbef0..d281ae2 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -213,7 +213,7 @@ static int convert_exec_to_group(const char *exec, char **result)
 		goto out;
 	}
 
-	for (ptr2 = ptr1; ptr2 != '\0'; ptr2++) {
+	for (ptr2 = ptr1; *ptr2 != '\0'; ptr2++) {
 		if (!isalnum(*ptr2) && *ptr2 != '_') {
 			*ptr2 = '\0';
 			break;