netdev - RE: [Intel-wired-lan] [PATCH iwl-net] ice: fix VLAN replay after reset

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Message-ID: <CYYPR11MB8429D8BC971E19B4BA0E1568BD6A2@CYYPR11MB8429.namprd11.prod.outlook.com>
Date: Thu, 26 Sep 2024 13:00:39 +0000
From: "Pucha, HimasekharX Reddy" <himasekharx.reddy.pucha@...el.com>
To: "Ertman, David M" <david.m.ertman@...el.com>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "Kitszel, Przemyslaw"
	<przemyslaw.kitszel@...el.com>
Subject: RE: [Intel-wired-lan] [PATCH iwl-net] ice: fix VLAN replay after
 reset

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of Dave Ertman
> Sent: Wednesday, September 18, 2024 11:33 PM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: netdev@...r.kernel.org; Kitszel, Przemyslaw <przemyslaw.kitszel@...el.com>
> Subject: [Intel-wired-lan] [PATCH iwl-net] ice: fix VLAN replay after reset
>
> There is a bug currently when there are more than one VLAN defined and any reset that affects the PF is initiated, after the reset rebuild no traffic will pass on any VLAN but the last one created.
>
> This is caused by the iteration though the VLANs during replay each clearing the vsi_map bitmap of the VSI that is being replayed.  The problem is that during rhe replay, the pointer to the vsi_map bitmap is used by each successive vlan to determine if it should be replayed on this VSI.
>
>The logic was that the replay of the VLAN would replace the bit in the map before the next VLAN would iterate through.  But, since the replay copies the old bitmap pointer to filt_replay_rules and creates > a new one for the recreated VLANS, it does not do this, and leaves the old bitmap broken to be used to replay the remaining VLANs.
>
>Since the old bitmap will be cleaned up in post replay cleanup, there is no need to alter it and break following VLAN replay, so don't clear the bit.
>
> Fixes: 334cb0626de1 ("ice: Implement VSI replay framework")
> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
> Signed-off-by: Dave Ertman <david.m.ertman@...el.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_switch.c | 2 --
>  1 file changed, 2 deletions(-)
>

Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com> (A Contingent worker at Intel)