netdev - Re: [PATCH v7 iwl-next 7/7] ice: stop destroying and reinitalizing Tx tracker during reset

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Date: Tue, 23 Jan 2024 17:07:29 +0000
From: Simon Horman <horms@...nel.org>
To: Karol Kolacinski <karol.kolacinski@...el.com>
Cc: intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	anthony.l.nguyen@...el.com, jesse.brandeburg@...el.com,
	Jacob Keller <jacob.e.keller@...el.com>
Subject: Re: [PATCH v7 iwl-next 7/7] ice: stop destroying and reinitalizing
 Tx tracker during reset

On Tue, Jan 23, 2024 at 11:51:31AM +0100, Karol Kolacinski wrote:
> 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>

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