linux-kernel - Re: [PATCH net-next 2/7] net: ipa: synchronize NAPI only for suspend

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Message-ID: <b054d86b-dead-3fa8-e2d5-6068a4d54e6c@linaro.org>
Date:   Fri, 5 Feb 2021 07:39:12 -0600
From:   Alex Elder <elder@...aro.org>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     davem@...emloft.net, elder@...nel.org, evgreen@...omium.org,
        bjorn.andersson@...aro.org, cpratapa@...eaurora.org,
        subashab@...eaurora.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 2/7] net: ipa: synchronize NAPI only for suspend

On 2/4/21 10:53 PM, Jakub Kicinski wrote:
> On Wed,  3 Feb 2021 09:28:50 -0600 Alex Elder wrote:
>>  int gsi_channel_suspend(struct gsi *gsi, u32 channel_id, bool stop)
>>  {
>>  	struct gsi_channel *channel = &gsi->channel[channel_id];
>> +	int ret;
>>  
>> -	return __gsi_channel_stop(channel, stop);
>> +	/* Synchronize NAPI if successful, to ensure polling has finished. */
>> +	ret = __gsi_channel_stop(channel, stop);
>> +	if (!ret)
>> +		napi_synchronize(&channel->napi);
>> +
>> +	return ret;
> 
> nit:
> 
> 	ret = function();
> 	if (ret)
> 		return ret;
> 
> 	/* success path: do something else */
> 
> 	return 0;

No problem, I'm happy with it the way you suggest.  I will
update in v2.   Thank you.

					-Alex