To:     Chaitanya Kulkarni <chaitanyak@nvidia.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
        "linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
        "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "iommu@lists.linux-foundation.org" <iommu@lists.linux-foundation.org>
Cc:     Stephen Bates <sbates@raithlin.com>,
        Christoph Hellwig <hch@lst.de>,
        Dan Williams <dan.j.williams@intel.com>,
        Jason Gunthorpe <jgg@ziepe.ca>,
        =?UTF-8?Q?Christian_K=c3=b6nig?= <christian.koenig@amd.com>,
        John Hubbard <jhubbard@nvidia.com>,
        Don Dutile <ddutile@redhat.com>,
        Matthew Wilcox <willy@infradead.org>,
        Daniel Vetter <daniel.vetter@ffwll.ch>,
        Jakowski Andrzej <andrzej.jakowski@intel.com>,
        Minturn Dave B <dave.b.minturn@intel.com>,
        Jason Ekstrand <jason@jlekstrand.net>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Xiong Jianxin <jianxin.xiong@intel.com>,
        Bjorn Helgaas <helgaas@kernel.org>,
        Ira Weiny <ira.weiny@intel.com>,
        Robin Murphy <robin.murphy@arm.com>,
        Martin Oliveira <martin.oliveira@eideticom.com>,
        Chaitanya Kulkarni <ckulkarnilinux@gmail.com>,
        Max Gurtovoy <mgurtovoy@nvidia.com>
References: <20211117215410.3695-1-logang@deltatee.com>
 <20211117215410.3695-12-logang@deltatee.com>
 <e4fda995-6b50-0f74-0af7-4d790ab66ba9@nvidia.com>
From:   Logan Gunthorpe <logang@deltatee.com>
Message-ID: <af6cda4f-9996-0aad-9278-1d41f824a070@deltatee.com>
Date:   Mon, 13 Dec 2021 15:28:54 -0700
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Subject: Re: [PATCH v4 11/23] nvme-pci: convert to using dma_map_sgtable()
Precedence: bulk


On 2021-12-13 3:21 p.m., Chaitanya Kulkarni wrote:
> 
>>   static blk_status_t nvme_pci_setup_sgls(struct nvme_dev *dev,
>> -		struct request *req, struct nvme_rw_command *cmd, int entries)
>> +		struct request *req, struct nvme_rw_command *cmd)
>>   {
>>   	struct nvme_iod *iod = blk_mq_rq_to_pdu(req);
>>   	struct dma_pool *pool;
>>   	struct nvme_sgl_desc *sg_list;
>> -	struct scatterlist *sg = iod->sg;
>> +	struct scatterlist *sg = iod->sgt.sgl;
>> +	int entries = iod->sgt.nents;
> 
> I don't see use of newly added entries variable anywhere in
> nvme_pci_setup_sgls(), what am I missing ?

'entries' is being moved out from the argument list of
nvme_pci_setup_sgls(), so there are already uses in the function that
don't show in the diff.

> Also, type of entries variable should be unsigned int to match
> the iod->sgt.nents.

Sure, I will fix that in the next version.

Thanks for the reviews!

Logan