linux-kernel - Re: [scsi-qedf] question about parameter ordering

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Date:   Wed, 3 May 2017 14:50:11 -0400 (EDT)
From:   Chad Dupuis <chad.dupuis@...ium.com>
To:     Randy Dunlap <rdunlap@...radead.org>
cc:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>,
        QLogic-Storage-Upstream@...ium.com,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Peter Senna Tschudin <peter.senna@...il.com>
Subject: Re: [scsi-qedf] question about parameter ordering


On Wed, 3 May 2017, 2:36pm, Randy Dunlap wrote:

> On 05/03/17 11:29, Chad Dupuis wrote:
> > 
> > On Wed, 3 May 2017, 1:58pm, Gustavo A. R. Silva wrote:
> > 
> >>
> >> Hello everybody,
> >>
> >> While looking into Coverity ID 1402011 I ran into the following piece of code
> >> at drivers/scsi/qedf/qedf_io.c:2057:
> >>
> >> /* Fill FC header */
> >> fc_hdr = &(tm_req->req_fc_hdr);
> >> sid = fcport->sid;
> >> did = fcport->rdata->ids.port_id;
> >> __fc_fill_fc_hdr(fc_hdr, FC_RCTL_DD_UNSOL_CMD, sid, did,
> >>                   FC_TYPE_FCP, FC_FC_FIRST_SEQ | FC_FC_END_SEQ |
> >>                   FC_FC_SEQ_INIT, 0);
> >>
> >> The issue here is that the position of arguments in the call to
> >> __fc_fill_fc_hdr() function do not match the ordering of the parameters:
> >>
> >> _sid_ is passed to _did_
> >> _did_ is passed to _sid_
> >>
> >> this is the function prototype:
> >>
> >> static inline void __fc_fill_fc_hdr(struct fc_frame_header *fh,
> >>                                    enum fc_rctl r_ctl,
> >>                                    u32 did, u32 sid, enum fc_fh_type type,
> >>                                    u32 f_ctl, u32 parm_offset)
> >>
> >> My question here is if this is intentionala?
> > 
> > This may have been but this code has been superseded by commit 	
> > be086e7c53f1fac51eed14523b28f2214b548dd2.B
> 
> what git tree is that in?
> 
> Thanks.
>

Apologies, a couple of stray characters got into the commit ID.  This is 
in mainline:

commit be086e7c53f1fac51eed14523b28f2214b548dd2
Author: Mintz, Yuval <Yuval.Mintz@...ium.com>
Date:   Sat Mar 11 18:39:18 2017 +0200

    qed*: Utilize Firmware 8.15.3.0
 
> >> In case it is not, I will send a patch to fix it. But first it would be great
> >> to hear any comment about it.
> >>
> >> By the way... the same is happening at drivers/scsi/qedf/qedf_els.c:109
> > 
> > May be a bug here so you could send a patch.
> 
> 
>