linux-kernel - Re: [Intel-wired-lan] [PATCH] e1000e: Fix error handling in e1000_set_d0_lplu_state

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Message-ID: <57bae851-e735-d015-114b-aeacd602f623@intel.com>
Date:   Mon, 8 Mar 2021 07:43:26 +0200
From:   "Neftin, Sasha" <sasha.neftin@...el.com>
To:     Dinghao Liu <dinghao.liu@....edu.cn>, kjlu@....edu
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        intel-wired-lan@...ts.osuosl.org, Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [Intel-wired-lan] [PATCH] e1000e: Fix error handling in
 e1000_set_d0_lplu_state_82571

On 2/28/2021 11:44, Dinghao Liu wrote:
> There is one e1e_wphy() call in e1000_set_d0_lplu_state_82571
> that we have caught its return value but lack further handling.
> Check and terminate the execution flow just like other e1e_wphy()
> in this function.
> 
> Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
> ---
>   drivers/net/ethernet/intel/e1000e/82571.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/net/ethernet/intel/e1000e/82571.c b/drivers/net/ethernet/intel/e1000e/82571.c
> index 88faf05e23ba..0b1e890dd583 100644
> --- a/drivers/net/ethernet/intel/e1000e/82571.c
> +++ b/drivers/net/ethernet/intel/e1000e/82571.c
> @@ -899,6 +899,8 @@ static s32 e1000_set_d0_lplu_state_82571(struct e1000_hw *hw, bool active)
>   	} else {
>   		data &= ~IGP02E1000_PM_D0_LPLU;
>   		ret_val = e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, data);
> +		if (ret_val)
> +			return ret_val;
>   		/* LPLU and SmartSpeed are mutually exclusive.  LPLU is used
>   		 * during Dx states where the power conservation is most
>   		 * important.  During driver activity we should enable
> 
Good for me.
Acked-by: Sasha Neftin <sasha.neftin@...el.com>