linux-kernel - RE: [PATCH 097/117] Staging: hv: storvsc: Add code to handle IDE devices using the storvsc driver

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Date:	Sat, 16 Jul 2011 13:12:31 +0000
From:	KY Srinivasan <kys@...rosoft.com>
To:	Sasha Levin <levinsasha928@...il.com>
CC:	Christoph Hellwig <hch@...radead.org>,
	"gregkh@...e.de" <gregkh@...e.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"virtualization@...ts.osdl.org" <virtualization@...ts.osdl.org>,
	"Haiyang Zhang" <haiyangz@...rosoft.com>
Subject: RE: [PATCH 097/117] Staging: hv: storvsc: Add code to handle IDE
 devices using the storvsc driver



> -----Original Message-----
> From: Sasha Levin [mailto:levinsasha928@...il.com]
> Sent: Saturday, July 16, 2011 9:02 AM
> To: KY Srinivasan
> Cc: Christoph Hellwig; gregkh@...e.de; linux-kernel@...r.kernel.org;
> devel@...uxdriverproject.org; virtualization@...ts.osdl.org; Haiyang Zhang
> Subject: RE: [PATCH 097/117] Staging: hv: storvsc: Add code to handle IDE devices
> using the storvsc driver
> 
> On Sat, 2011-07-16 at 12:57 +0000, KY Srinivasan wrote:
> >
> > > -----Original Message-----
> > > From: Christoph Hellwig [mailto:hch@...radead.org]
> > > Sent: Friday, July 15, 2011 10:05 PM
> > > To: KY Srinivasan
> > > Cc: gregkh@...e.de; linux-kernel@...r.kernel.org;
> > > devel@...uxdriverproject.org; virtualization@...ts.osdl.org; Haiyang Zhang
> > > Subject: Re: [PATCH 097/117] Staging: hv: storvsc: Add code to handle IDE
> devices
> > > using the storvsc driver
> > >
> > > Thanks, this looks much cleaner than the initial variant.
> > >
> > > > +	if (dev_is_ide) {
> > > > +		storvsc_get_ide_info(device, &target, &path);
> > > > +		host_dev->path = device_info.path_id;
> > > > +		host_dev->target = device_info.target_id;
> > > > +	} else {
> > > > +		host_dev->path = device_info.path_id;
> > > > +		host_dev->target = device_info.target_id;
> > > > +	}
> > >
> > > Is using the device_info values in both branches intentional?  If so
> > > there's no need to have these assignments duplicated.
> >
> > While we set the values in both the branches, the value set is different;
> > The IDE side encodes the bits differently and is appropriately parsed in the
> > function storvsc_get_ide_info().
> 
> Is think that what Christoph meant was simplifying it to:
> 
> 	if (dev_is_ide)
> 		storvsc_get_ide_info(device, &target, &path);
> 
> 	host_dev->path = device_info.path_id;
> 	host_dev->target = device_info.target_id;

Good point! It is still too early in the morning for me. 
Greg, if it is ok with you, in the interest of keeping the patch
cops happy, I can submit a patch for this on top of this series.

Regards,

K. Y
> 
> --
> 
> Sasha.
> 

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