samples, bpf: remove redundant ret assignment in bpf_load_program()

2 redundant ret assignments removed:

* 'ret = 1' before the logic 'if (data_maps)', and if any errors jump to
  label 'done'. No 'ret = 1' needed before the error jump.

* After the '/* load programs */' part, if everything goes well, then
  the BPF code will be loaded and 'ret' set to 0 by load_and_attach().
  If something goes wrong, 'ret' set to none-O, the redundant 'ret = 0'
  after the for clause will make the error skipped.

  For example, if some BPF code cannot provide supported program types
  in ELF SEC("unknown"), the for clause will not call load_and_attach()
  to load the BPF code. 1 should be returned to callees instead of 0.

Signed-off-by: Wang Sheng-Hui <shhuiw@foxmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index bebe4188b4b36cbf42fe39f1f5c61c43ea1bf8a9..feca497d6afdb4b02fdb9e3f851098f961ae3807 100644 (file)
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -549,7 +549,6 @@ static int do_load_bpf_file(const char *path, fixup_map_cb fixup_map)
                if (nr_maps < 0) {
                        printf("Error: Failed loading ELF maps (errno:%d):%s\n",
                               nr_maps, strerror(-nr_maps));
-                       ret = 1;
                        goto done;
                }
                if (load_maps(map_data, nr_maps, fixup_map))
@@ -615,7 +614,6 @@ static int do_load_bpf_file(const char *path, fixup_map_cb fixup_map)
                }
        }
 
-       ret = 0;
 done:
        close(fd);
        return ret;