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net/mlx5: Stop polling for command response if interface goes down

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[ Upstream commit b1f0349bd6d320c382df2e7f6fc2ac95c85f2b18 ]

Stop polling on firmware response to command in polling mode if the
command interface got down. This situation can occur, for example, if a
firmware fatal error is detected during polling.

This change halts the polling process when the command interface goes
down, preventing unnecessary waits.

Fixes: b898ce7bcc ("net/mlx5: cmdif, Avoid skipping reclaim pages if FW is not accessible")
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Shay Drori <shayd@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Moshe Shemesh 2025-09-29 00:02:07 +03:00 committed by Greg Kroah-Hartman
parent 9d49e4b146
commit ca117b13d0
1 changed files with 5 additions and 1 deletions
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6
drivers/net/ethernet/mellanox/mlx5/core/cmd.c
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@ -289,6 +289,10 @@ static void poll_timeout(struct mlx5_cmd_work_ent *ent)
return;
}
cond_resched();
if (mlx5_cmd_is_down(dev)) {
ent->ret = -ENXIO;
return;
}
} while (time_before(jiffies, poll_end));
ent->ret = -ETIMEDOUT;
@ -1056,7 +1060,7 @@ static void cmd_work_handler(struct work_struct *work)
poll_timeout(ent);
/* make sure we read the descriptor after ownership is SW */
rmb();
mlx5_cmd_comp_handler(dev, 1ULL << ent->idx, (ent->ret == -ETIMEDOUT));
mlx5_cmd_comp_handler(dev, 1ULL << ent->idx, !!ent->ret);
}
}