netdev - Re: [net-next PATCH 2/2] drivers: net: cpsw: add separate napi for tx packet handling for performance improvment

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Date:	Tue, 28 Jul 2015 11:32:43 +0530
From:	Mugunthan V N <mugunthanvnm@...com>
To:	Francois Romieu <romieu@...zoreil.com>
CC:	<netdev@...r.kernel.org>, <davem@...emloft.net>
Subject: Re: [net-next PATCH 2/2] drivers: net: cpsw: add separate napi for
 tx packet handling for performance improvment

On Tuesday 28 July 2015 02:52 AM, Francois Romieu wrote:
> Mugunthan V N <mugunthanvnm@...com> :
> [...]
>> diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
>> index d68d759..4f98537 100644
>> --- a/drivers/net/ethernet/ti/cpsw.c
>> +++ b/drivers/net/ethernet/ti/cpsw.c
>> @@ -752,13 +753,22 @@ static irqreturn_t cpsw_tx_interrupt(int irq, void *dev_id)
>>  	struct cpsw_priv *priv = dev_id;
>>  
>>  	cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_TX);
>> -	cpdma_chan_process(priv->txch, 128);
>> +	writel(0, &priv->wr_regs->tx_en);
>> +
>> +	if (netif_running(priv->ndev)) {
>> +		napi_schedule(&priv->napi_tx);
>> +		return IRQ_HANDLED;
>> +	}
> 
> 
> cpsw_ndo_stop calls napi_disable: you can remove netif_running.
> 

Hmmmm, Will fix in v2.

Regards
Mugunthan V N
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