From: Yucong Sun <fallentree@fb.com>
Date: Thu, 19 Aug 2021 09:36:09 -0700
Subject: selftests/bpf: Adding delay in socketmap_listen to reduce flakyness
Patch-mainline: v5.15-rc1
Git-commit: 3666b167ea68997b73dd5b78678a1c3f0d6730bb
References: jsc#PED-1377

This patch adds a 1ms delay to reduce flakyness of the test.

Signed-off-by: Yucong Sun <fallentree@fb.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210819163609.2583758-1-fallentree@fb.com
Acked-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
---
 tools/testing/selftests/bpf/prog_tests/sockmap_listen.c |   12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

--- a/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c
+++ b/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c
@@ -1603,8 +1603,10 @@ static void unix_redir_to_connected(int
 again:
 	n = read(mode == REDIR_INGRESS ? p0 : c0, &b, 1);
 	if (n < 0) {
-		if (errno == EAGAIN && retries--)
+		if (errno == EAGAIN && retries--) {
+			usleep(1000);
 			goto again;
+		}
 		FAIL_ERRNO("%s: read", log_prefix);
 	}
 	if (n == 0)
@@ -1776,8 +1778,10 @@ static void udp_redir_to_connected(int f
 again:
 	n = read(mode == REDIR_INGRESS ? p0 : c0, &b, 1);
 	if (n < 0) {
-		if (errno == EAGAIN && retries--)
+		if (errno == EAGAIN && retries--) {
+			usleep(1000);
 			goto again;
+		}
 		FAIL_ERRNO("%s: read", log_prefix);
 	}
 	if (n == 0)
@@ -1869,8 +1873,10 @@ static void inet_unix_redir_to_connected
 again:
 	n = read(mode == REDIR_INGRESS ? p0 : c0, &b, 1);
 	if (n < 0) {
-		if (errno == EAGAIN && retries--)
+		if (errno == EAGAIN && retries--) {
+			usleep(1000);
 			goto again;
+		}
 		FAIL_ERRNO("%s: read", log_prefix);
 	}
 	if (n == 0)