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From: "Matthieu Baerts (NGI0)" <matttbe@kernel.org>
Date: Wed, 05 Jun 2024 11:21:16 +0200
Subject: [PATCH net 1/3] selftests: net: lib: support errexit with busywait
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Message-Id: <20240605-upstream-net-20240605-selftests-net-lib-fixes-v1-1-b3afadd368c9@kernel.org>
References: <20240605-upstream-net-20240605-selftests-net-lib-fixes-v1-0-b3afadd368c9@kernel.org>
In-Reply-To: <20240605-upstream-net-20240605-selftests-net-lib-fixes-v1-0-b3afadd368c9@kernel.org>
To: mptcp@lists.linux.dev, "David S. Miller" <davem@davemloft.net>, 
 Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, 
 Paolo Abeni <pabeni@redhat.com>, Shuah Khan <shuah@kernel.org>, 
 Petr Machata <petrm@nvidia.com>, Hangbin Liu <liuhangbin@gmail.com>
Cc: netdev@vger.kernel.org, linux-kselftest@vger.kernel.org, 
 linux-kernel@vger.kernel.org, "Matthieu Baerts (NGI0)" <matttbe@kernel.org>, 
 stable@vger.kernel.org, Geliang Tang <geliang@kernel.org>

If errexit is enabled ('set -e'), loopy_wait -- or busywait and others
using it -- will stop after the first failure.

Note that if the returned status of loopy_wait is checked, and even if
errexit is enabled, Bash will not stop at the first error.

Fixes: 25ae948b4478 ("selftests/net: add lib.sh")
Cc: stable@vger.kernel.org
Acked-by: Geliang Tang <geliang@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
---
 tools/testing/selftests/net/lib.sh | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh
index edc030e81a46..a422e10d3d3a 100644
--- a/tools/testing/selftests/net/lib.sh
+++ b/tools/testing/selftests/net/lib.sh
@@ -67,9 +67,7 @@ loopy_wait()
 	while true
 	do
 		local out
-		out=$("$@")
-		local ret=$?
-		if ((!ret)); then
+		if out=$("$@"); then
 			echo -n "$out"
 			return 0
 		fi

-- 
2.43.0