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

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Message-ID: <20150727212206.GA8912@electric-eye.fr.zoreil.com>
Date:	Mon, 27 Jul 2015 23:22:07 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	Mugunthan V N <mugunthanvnm@...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

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.

-- 
Ueimor
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