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selftests: iou-zcrx: defer listen() until after zcrx setup

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The server binds the queues for zero-copy after listen(). If the client
does a connect() during this time it can fail with EHOSTUNREACH on
a cold system. This was encountered with the mlx5 driver where binding
the .ndo_queue_start() is a slow operation during which no packets
can be exchanged.

This change moves listen() after queue binding, when the test server is
fully operational.

Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Link: https://patch.msgid.link/20260611160341.3697227-2-dtatulea@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Dragos Tatulea 2026-06-11 19:03:41 +03:00 committed by Jakub Kicinski
parent 315a0c3399
commit ec782be97d
1 changed files with 3 additions and 3 deletions
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6
tools/testing/selftests/drivers/net/hw/iou-zcrx.c
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@ -351,9 +351,6 @@ static void run_server(void)
if (ret < 0)
error(1, 0, "bind()");
if (listen(fd, 1024) < 0)
error(1, 0, "listen()");
flags |= IORING_SETUP_COOP_TASKRUN;
flags |= IORING_SETUP_SINGLE_ISSUER;
flags |= IORING_SETUP_DEFER_TASKRUN;
@ -366,6 +363,9 @@ static void run_server(void)
if (cfg_dry_run)
return;
if (listen(fd, 1024) < 0)
error(1, 0, "listen()");
add_accept(&ring, fd);
tstop = gettimeofday_ms() + 5000;