netdev - RE: [Intel-wired-lan] [PATCH v5 iwl-next 6/6] ice: stop destroying and reinitalizing Tx tracker during reset

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Message-ID: <CYYPR11MB84298F6B4DB7888F7CBF0532BD6F2@CYYPR11MB8429.namprd11.prod.outlook.com>
Date: Fri, 12 Jan 2024 17:32:58 +0000
From: "Pucha, HimasekharX Reddy" <himasekharx.reddy.pucha@...el.com>
To: "Kolacinski, Karol" <karol.kolacinski@...el.com>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC: "Keller, Jacob E" <jacob.e.keller@...el.com>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "Kolacinski, Karol" <karol.kolacinski@...el.com>,
	"Nguyen, Anthony L" <anthony.l.nguyen@...el.com>, "Brandeburg, Jesse"
	<jesse.brandeburg@...el.com>
Subject: RE: [Intel-wired-lan] [PATCH v5 iwl-next 6/6] ice: stop destroying
 and reinitalizing Tx tracker during reset

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of Karol Kolacinski
> Sent: Monday, January 8, 2024 6:17 PM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: Keller, Jacob E <jacob.e.keller@...el.com>; netdev@...r.kernel.org; Kolacinski, Karol <karol.kolacinski@...el.com>; Nguyen, Anthony L <anthony.l.nguyen@...el.com>; Brandeburg, Jesse <jesse.brandeburg@...el.com>
> Subject: [Intel-wired-lan] [PATCH v5 iwl-next 6/6] ice: stop destroying and reinitalizing Tx tracker during reset
>
> From: Jacob Keller <jacob.e.keller@...el.com>
>
> The ice driver currently attempts to destroy and re-initialize the Tx
> timestamp tracker during the reset flow. The release of the Tx tracker
> only happened during CORE reset or GLOBAL reset. The ice_ptp_rebuild()
> function always calls the ice_ptp_init_tx function which will allocate
> a new tracker data structure, resulting in memory leaks during PF reset.
>
> Certainly the driver should not be allocating a new tracker without
> removing the old tracker data, as this results in a memory leak.
> Additionally, there's no reason to remove the tracker memory during a
> reset. Remove this logic from the reset and rebuild flow. Instead of
> releasing the Tx tracker, flush outstanding timestamps just before we
> reset the PHY timestamp block in ice_ptp_cfg_phy_interrupt().
>
> Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
> Signed-off-by: Karol Kolacinski <karol.kolacinski@...el.com>
> Reviewed-by: Jacob Keller <jacob.e.keller@...el.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_ptp.c | 33 +++++++++++++++---------
>  1 file changed, 21 insertions(+), 12 deletions(-)
>

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