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Code

net/mlx5: HWS, don't rehash on every kind of insertion failure

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If rule creation failed due to a full queue, due to timeout
in polling for completion, or due to matcher being in resize,
don't try to initiate rehash sequence - rehash would have
failed anyway.

Fixes: 2111bb970c ("net/mlx5: HWS, added backward-compatible API handling")
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Reviewed-by: Vlad Dogaru <vdogaru@nvidia.com>
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Link: https://patch.msgid.link/20250817202323.308604-6-mbloch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Yevgeny Kliteynik 2025-08-17 23:23:21 +03:00 committed by Jakub Kicinski
parent 1a72298d27
commit 7c60952f83
1 changed files with 15 additions and 0 deletions
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15
drivers/net/ethernet/mellanox/mlx5/core/steering/hws/bwc.c
View File

@ -1063,6 +1063,21 @@ int mlx5hws_bwc_rule_create_simple(struct mlx5hws_bwc_rule *bwc_rule,
return 0; /* rule inserted successfully */
}
/* Rule insertion could fail due to queue being full, timeout, or
* matcher in resize. In such cases, no point in trying to rehash.
*/
if (ret == -EBUSY || ret == -ETIMEDOUT || ret == -EAGAIN) {
mutex_unlock(queue_lock);
mlx5hws_err(ctx,
"BWC rule insertion failed - %s (%d)\n",
ret == -EBUSY ? "queue is full" :
ret == -ETIMEDOUT ? "timeout" :
ret == -EAGAIN ? "matcher in resize" : "N/A",
ret);
hws_bwc_rule_cnt_dec(bwc_rule);
return ret;
}
/* At this point the rule wasn't added.
* It could be because there was collision, or some other problem.
* Try rehash by size and insert rule again - last chance.