linux-kernel - Re: [RFC PATCH V3 11/11] HV/Storvsc: Add Isolation VM support for storvsc driver

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Date:   Mon, 7 Jun 2021 22:59:46 +0800
From:   Tianyu Lan <ltykernel@...il.com>
To:     Christoph Hellwig <hch@....de>
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        wei.liu@...nel.org, decui@...rosoft.com, tglx@...utronix.de,
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        arnd@...db.de, dave.hansen@...ux.intel.com, luto@...nel.org,
        peterz@...radead.org, akpm@...ux-foundation.org,
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        hannes@...xchg.org, cai@....pw, krish.sadhukhan@...cle.com,
        saravanand@...com, Tianyu.Lan@...rosoft.com,
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        robin.murphy@....com, boris.ostrovsky@...cle.com, jgross@...e.com,
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        vkuznets@...hat.com, thomas.lendacky@....com,
        brijesh.singh@....com, sunilmut@...rosoft.com
Subject: Re: [RFC PATCH V3 11/11] HV/Storvsc: Add Isolation VM support for
 storvsc driver



On 6/7/2021 2:46 PM, Christoph Hellwig wrote:
> On Sun, May 30, 2021 at 11:06:28AM -0400, Tianyu Lan wrote:
>> +				for (i = 0; i < request->hvpg_count; i++)
>> +					dma_unmap_page(&device->device,
>> +							request->dma_range[i].dma,
>> +							request->dma_range[i].mapping_size,
>> +							request->vstor_packet.vm_srb.data_in
>> +							     == READ_TYPE ?
>> +							DMA_FROM_DEVICE : DMA_TO_DEVICE);
>> +				kfree(request->dma_range);
> 
> Unreadably long lines.  You probably want to factor the quoted code into
> a little readable helper and do the same for the map side.

Good suggestion. Will update.

Thanks.