netdev - Re: [PATCH v4] ethernet/arc/arc_emac

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Date:	Mon, 17 Jun 2013 09:03:50 +0000
From:	Alexey Brodkin <Alexey.Brodkin@...opsys.com>
To:	Joe Perches <joe@...ches.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Andy Shevchenko <andy.shevchenko@...il.com>,
	Francois Romieu <romieu@...zoreil.com>,
	"Vineet Gupta" <Vineet.Gupta1@...opsys.com>,
	Mischa Jonker <Mischa.Jonker@...opsys.com>,
	Arnd Bergmann <arnd@...db.de>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	"Paul Gortmaker" <paul.gortmaker@...driver.com>,
	"David S. Miller" <davem@...emloft.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>
Subject: Re: [PATCH v4] ethernet/arc/arc_emac - Add new driver

On 06/16/2013 11:41 AM, Joe Perches wrote:
> On Sat, 2013-06-15 at 20:47 +0000, Alexey Brodkin wrote:
>> On 06/16/2013 12:37 AM, Joe Perches wrote:
>>> On Sun, 2013-06-16 at 00:20 +0400, Alexey Brodkin wrote:
> []
>>>> +static int arc_emac_rx(struct net_device *ndev, int budget)
>>> []
>>>> +		/* Prepare the BD for next cycle */
>>>> +		rx_buff->skb = netdev_alloc_skb_ip_align(ndev, buflen);
>>>> +		if (unlikely(!rx_buff->skb)) {
>>>> +			if (net_ratelimit())
>>>> +				netdev_err(ndev, "cannot allocate skb\n");
>>>
>>> Unnecessary OOM message, might as well remove it.
>>> rx_dropped gives the same info.
>>
>> With all those error messages I wanted to make life easier (especially
>> for me) if errors appear. User will immediately know where problem
>> happened. Indeed "rx_dropped" (when it is used only once in driver) may
>> show where issue happened, but if later at some point "rx_dropped" will
>> be incremented in other locations then user won't understand immediately
>> where error happened.
>
> Alloc errors emit a dump_stack() already so this is redundant.

Makes sense. Will remove this comment.

-Alexey
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