netdev - Re: [PATCH iwl-net 1/2] i40e: avoid double calling i40e_pf_rxq

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Date: Mon, 5 Feb 2024 11:13:32 +0000
From: Simon Horman <horms@...nel.org>
To: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
Cc: intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	anthony.l.nguyen@...el.com, magnus.karlsson@...el.com
Subject: Re: [PATCH iwl-net 1/2] i40e: avoid double calling i40e_pf_rxq_wait()

On Thu, Feb 01, 2024 at 04:42:18PM +0100, Maciej Fijalkowski wrote:
> Currently, when interface is being brought down and
> i40e_vsi_stop_rings() is called, i40e_pf_rxq_wait() is called two times,
> which is wrong. To showcase this scenario, simplified call stack looks
> as follows:
> 
> i40e_vsi_stop_rings()
> 	i40e_control wait rx_q()
> 		i40e_control_rx_q()
> 		i40e_pf_rxq_wait()
> 	i40e_vsi_wait_queues_disabled()
> 		i40e_pf_rxq_wait()  // redundant call
> 
> To fix this, let us s/i40e_control_wait_rx_q/i40e_control_rx_q within
> i40e_vsi_stop_rings().
> 
> Fixes: 65662a8dcdd0 ("i40e: Fix logic of disabling queues")
> Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>

Reviewed-by: Simon Horman <horms@...nel.org>