netdev - Re: [net-next 10/16] i40e: Fix the EMPR interrupt received handling

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Message-ID: <54EB20DE.1010508@cogentembedded.com>
Date:	Mon, 23 Feb 2015 15:45:18 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>, davem@...emloft.net
CC:	Anjali Singhai Jain <anjali.singhai@...el.com>,
	netdev@...r.kernel.org, nhorman@...hat.com, sassmann@...hat.com,
	jogreene@...hat.com
Subject: Re: [net-next 10/16] i40e: Fix the EMPR interrupt received handling

Hello.

On 2/23/2015 6:25 AM, Jeff Kirsher wrote:

> From: Anjali Singhai Jain <anjali.singhai@...el.com>

> We shouldn't trigger another EMPR when we receive an EMPR event.
> This patch handles EMPR event reception with a different state
> so that we can do the right thing for NVM.

> Change-ID: I9cac70b3658600f016a65beb6fb157e1c1f9adf9
> Signed-off-by: Anjali Singhai Jain <anjali.singhai@...el.com>
> Tested-by: Jim Young <james.m.young@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

[...]

> diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
> index 2260cc1..0c1c38e 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c

> @@ -6179,8 +6179,8 @@ static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit)
>   	}
>
>   	/* re-verify the eeprom if we just had an EMP reset */
> -	if (test_bit(__I40E_EMP_RESET_REQUESTED, &pf->state)) {
> -		clear_bit(__I40E_EMP_RESET_REQUESTED, &pf->state);
> +	if (test_bit(__I40E_EMP_RESET_INTR_RECEIVED, &pf->state)) {
> +		clear_bit(__I40E_EMP_RESET_INTR_RECEIVED, &pf->state);

    Why not use test_and_clear_bit()?

>   		i40e_verify_eeprom(pf);
>   	}

WBR, Sergei

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