[PATCH] tools/bpf: Return the appropriate error value

[彭浩(Richard) <richard.peng@xxxxxxxx>]

Compile times error:
"Error: failed to load BTF from /mnt/linux/vmlinux: No such file or directory".
This file "/mnt/linux/vmlinux" actually exists, but only because CONFIG_DEBUG_INFO_BTF
is not configured with this error.

Signed-off-by: Peng Hao <richard.peng@xxxxxxxx>
---
 tools/lib/bpf/btf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index 231b07203e3d..228f508fbd04 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -865,7 +865,7 @@ struct btf *btf__parse_elf(const char *path, struct btf_ext **btf_ext)
        err = 0;

        if (!btf_data) {
-               err = -ENOENT;
+               err = -EPROTO;
                goto done;
        }
        btf = btf__new(btf_data->d_buf, btf_data->d_size);
--
2.18.4