From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Tomoya MORINAGA" <tomoya-linux-ECg8zkTtlr0C6LszWs/t0g@public.gmane.org>
Subject: Re: [PATCH net-next-2.6 v3] can: Topcliff: PCH_CAN driver: Add Flow
	control,
Date: Fri, 19 Nov 2010 15:18:58 +0900
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Cc: andrew.chih.howe.khor-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
	Masayuki Ohtake <masa-korg-ECg8zkTtlr0C6LszWs/t0g@public.gmane.org>,
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	Christian Pellegrin <chripell-VaTbYqLCNhc@public.gmane.org>, qi.wang-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org
To: "Marc Kleine-Budde" <mkl-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
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On Tuesday, November 16, 2010 9:22 PM, Marc Kleine-Budde wrote :

Except the following, I have updated/resubmitted already .

>>  static int pch_can_rx_poll(struct napi_struct *napi, int quota)
>>  {
>>   struct net_device *ndev = napi->dev;
>>   struct pch_can_priv *priv = netdev_priv(ndev);
>> - struct net_device_stats *stats = &(priv->ndev->stats);
>> - u32 dlc;
>>   u32 int_stat;
>>   int rcv_pkts = 0;
                    ^^^^
>can be removed...if you remove the += below
Since there is "goto" code, "=0" is better.



>> - spin_unlock_irqrestore(&priv->msgif_reg_lock, flags);
>> + pch_can_rw_msg_obj(&priv->regs->ifregs[1].creq, tx_obj_no);
>Still we have the busy waiting in the TX path. Maybe you can move the
>waiting before accessing the if[1] and remove the busy waiting here.
I can't understand your saying.
For transmitting data, calling pch_can_rw_msg_obj is mandatory.


---
Thanks,

Tomoya MORINAGA
OKI SEMICONDUCTOR CO., LTD.