netdev - Re: [PATCH] net/tg3: fix race condition in tg3_reset_task

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Date: Tue, 3 Oct 2023 10:04:41 +0530
From: Pavan Chebbi <pavan.chebbi@...adcom.com>
To: Thinh Tran <thinhtr@...ux.vnet.ibm.com>
Cc: netdev@...r.kernel.org, siva.kallam@...adcom.com, prashant@...adcom.com, 
	mchan@...adcom.com, drc@...ux.vnet.ibm.com, 
	Venkata Sai Duggi <venkata.sai.duggi@....com>
Subject: Re: [PATCH] net/tg3: fix race condition in tg3_reset_task_cancel()

On Tue, Oct 3, 2023 at 12:25 AM Thinh Tran <thinhtr@...ux.vnet.ibm.com> wrote:
>
> during the EEH error injection tests on the 4-port 1 GbE NetXtreme
> BCM5719 Gigabit Ethernet PCIe adapter, a race condition was observed in
> the process of resetting and setting the driver flag to
> TX_RECOVERY_PENDING between tg3_reset_task_cancel() and tg3_tx_recover().
> As a result, it occasionally leads to transmit timeouts and the
> subsequent disabling of all the driver's interfaces.

Can you elaborate on the race condition please? Are you saying
tg3_reset_task_cancel() cleared the flag and tg3_tx_recover() set it
again and the reset task never got a chance to run?
Is that what is leading to TX stall?

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