perf tools: Consolidate error path in __open_dso()

On failure, it should free the 'name', so clean up the error path using
goto.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: kernel-team@lge.com
Link: http://lkml.kernel.org/r/20170608073109.30699-7-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index c63525d845c5f5f46380287b9f7625a661ba9373..4e7ab611377acd56c1be78cbd983058e5ce5142b 100644 (file)
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -454,7 +454,7 @@ static int do_open(char *name)
 
 static int __open_dso(struct dso *dso, struct machine *machine)
 {
-       int fd;
+       int fd = -EINVAL;
        char *root_dir = (char *)"";
        char *name = malloc(PATH_MAX);
 
@@ -465,23 +465,19 @@ static int __open_dso(struct dso *dso, struct machine *machine)
                root_dir = machine->root_dir;
 
        if (dso__read_binary_type_filename(dso, dso->binary_type,
-                                           root_dir, name, PATH_MAX)) {
-               free(name);
-               return -EINVAL;
-       }
+                                           root_dir, name, PATH_MAX))
+               goto out;
 
-       if (!is_regular_file(name)) {
-               free(name);
-               return -EINVAL;
-       }
+       if (!is_regular_file(name))
+               goto out;
 
        if (dso__needs_decompress(dso)) {
                char newpath[KMOD_DECOMP_LEN];
                size_t len = sizeof(newpath);
 
                if (dso__decompress_kmodule_path(dso, name, newpath, len) < 0) {
-                       free(name);
-                       return -dso->load_errno;
+                       fd = -dso->load_errno;
+                       goto out;
                }
 
                strcpy(name, newpath);
@@ -492,6 +488,7 @@ static int __open_dso(struct dso *dso, struct machine *machine)
        if (dso__needs_decompress(dso))
                unlink(name);
 
+out:
        free(name);
        return fd;
 }