linux-kernel - Re: [PATCH 10/22] staging: unisys: visorbus: Make use of the new sg

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Message-ID: <a182336f-ebda-66c6-3a2e-90f2d43582d7@deltatee.com>
Date:   Fri, 14 Apr 2017 10:12:30 -0600
From:   Logan Gunthorpe <logang@...tatee.com>
To:     "Kershner, David A" <David.Kershner@...sys.com>,
        Christoph Hellwig <hch@....de>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Sagi Grimberg <sagi@...mberg.me>, Jens Axboe <axboe@...nel.dk>,
        Tejun Heo <tj@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Ming Lin <ming.l@....samsung.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linaro-mm-sig@...ts.linaro.org" <linaro-mm-sig@...ts.linaro.org>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        "linux-raid@...r.kernel.org" <linux-raid@...r.kernel.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "fcoe-devel@...n-fcoe.org" <fcoe-devel@...n-fcoe.org>,
        "open-iscsi@...glegroups.com" <open-iscsi@...glegroups.com>,
        "megaraidlinux.pdl@...adcom.com" <megaraidlinux.pdl@...adcom.com>,
        *S-Par-Maintainer <SParMaintainer@...sys.com>,
        "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "target-devel@...r.kernel.org" <target-devel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "rds-devel@....oracle.com" <rds-devel@....oracle.com>
Cc:     Steve Wise <swise@...ngridcomputing.com>,
        Stephen Bates <sbates@...thlin.com>
Subject: Re: [PATCH 10/22] staging: unisys: visorbus: Make use of the new
 sg_map helper function

Great, thanks!

Logan

On 14/04/17 10:07 AM, Kershner, David A wrote:
> Can you add Acked-by for this patch? 
> 
> Acked-by: David Kershner <david.kershner@...sys.com>
> 
> Tested on s-Par and no problems. 
> 
> Thanks,
> David Kershner
> 
>> ---
>>  drivers/staging/unisys/visorhba/visorhba_main.c | 12 +++++++-----
>>  1 file changed, 7 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/staging/unisys/visorhba/visorhba_main.c
>> b/drivers/staging/unisys/visorhba/visorhba_main.c
>> index 0ce92c8..2d8c8bc 100644
>> --- a/drivers/staging/unisys/visorhba/visorhba_main.c
>> +++ b/drivers/staging/unisys/visorhba/visorhba_main.c
>> @@ -842,7 +842,6 @@ do_scsi_nolinuxstat(struct uiscmdrsp *cmdrsp, struct
>> scsi_cmnd *scsicmd)
>>  	struct scatterlist *sg;
>>  	unsigned int i;
>>  	char *this_page;
>> -	char *this_page_orig;
>>  	int bufind = 0;
>>  	struct visordisk_info *vdisk;
>>  	struct visorhba_devdata *devdata;
>> @@ -869,11 +868,14 @@ do_scsi_nolinuxstat(struct uiscmdrsp *cmdrsp,
>> struct scsi_cmnd *scsicmd)
>>
>>  		sg = scsi_sglist(scsicmd);
>>  		for (i = 0; i < scsi_sg_count(scsicmd); i++) {
>> -			this_page_orig = kmap_atomic(sg_page(sg + i));
>> -			this_page = (void *)((unsigned long)this_page_orig |
>> -					     sg[i].offset);
>> +			this_page = sg_map(sg + i, SG_KMAP_ATOMIC);
>> +			if (IS_ERR(this_page)) {
>> +				scsicmd->result = DID_ERROR << 16;
>> +				return;
>> +			}
>> +
>>  			memcpy(this_page, buf + bufind, sg[i].length);
>> -			kunmap_atomic(this_page_orig);
>> +			sg_unmap(sg + i, this_page, SG_KMAP_ATOMIC);
>>  		}
>>  	} else {
>>  		devdata = (struct visorhba_devdata *)scsidev->host-
>>> hostdata;
>> --
>> 2.1.4
>