[PATCH 5.8 351/464] tools, bpftool: Fix wrong return value in do_dump()

[Greg Kroah-Hartman]

From: Tianjia Zhang <tianjia.zhang@xxxxxxxxxxxxxxxxx>

[ Upstream commit 041549b7b2c7811ec40e705c439211f00ade2dda ]

In case of btf_id does not exist, a negative error code -ENOENT
should be returned.

Fixes: c93cc69004df3 ("bpftool: add ability to dump BTF types")
Signed-off-by: Tianjia Zhang <tianjia.zhang@xxxxxxxxxxxxxxxxx>
Signed-off-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Reviewed-by: Tobias Klauser <tklauser@xxxxxxxxxx>
Acked-by: Andrii Nakryiko <andriin@xxxxxx>
Acked-by: John Fastabend <john.fastabend@xxxxxxxxx>
Link: https://lore.kernel.org/bpf/20200802111540.5384-1-tianjia.zhang@xxxxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 tools/bpf/bpftool/btf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/bpf/bpftool/btf.c b/tools/bpf/bpftool/btf.c
index faac8189b2853..c2f1fd414820a 100644
--- a/tools/bpf/bpftool/btf.c
+++ b/tools/bpf/bpftool/btf.c
@@ -596,7 +596,7 @@ static int do_dump(int argc, char **argv)
 			goto done;
 		}
 		if (!btf) {
-			err = ENOENT;
+			err = -ENOENT;
 			p_err("can't find btf with ID (%u)", btf_id);
 			goto done;
 		}
-- 
2.25.1