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mlx5e: add add missing BH locking around napi_schdule() 

It's not correct to call napi_schedule() in pure process
context. Because we use __raise_softirq_irqoff() we require
callers to be in a context which will eventually lead to
softirq handling (hardirq, bh disabled, etc.).

With code as is users will see:

 NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08!!!

Fixes: a8dd7ac12f ("net/mlx5e: Generalize RQ activation")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Jakub Kicinski 2021-05-05 13:20:26 -07:00 committed by Saeed Mahameed
parent 6ff51ab8aa
commit e63052a5dd
1 changed files with 5 additions and 2 deletions
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7
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
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@ -889,10 +889,13 @@ err_free_rq:
void mlx5e_activate_rq(struct mlx5e_rq *rq)
{
set_bit(MLX5E_RQ_STATE_ENABLED, &rq->state);
if (rq->icosq)
if (rq->icosq) {
mlx5e_trigger_irq(rq->icosq);
else
} else {
local_bh_disable();
napi_schedule(rq->cq.napi);
local_bh_enable();
}
}
void mlx5e_deactivate_rq(struct mlx5e_rq *rq)