linux-kernel - Re: [PATCH 1/2] staging: andriod: ion: Add ion_phys_get_by

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Date:	Sat, 17 Jan 2015 16:04:18 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	"Tang, Feng" <feng.tang@...el.com>
Cc:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	John Stultz <john.stultz@...aro.org>,
	Colin Cross <ccross@...roid.com>,
	Heesub Shin <heesub.shin@...sung.com>,
	Mitchel Humpherys <mitchelh@...eaurora.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] staging: andriod: ion: Add ion_phys_get_by_id
 function

On Mon, Jan 05, 2015 at 03:51:54PM +0000, Tang, Feng wrote:
> Hi Alan,
> 
> Thanks for the review.
> 
> > -----Original Message-----
> > From: One Thousand Gnomes [mailto:gnomes@...rguk.ukuu.org.uk]
> > Sent: Monday, January 05, 2015 10:25 PM
> > To: Tang, Feng
> > Cc: Greg KH; John Stultz; Colin Cross; Heesub Shin; Mitchel Humpherys;
> > linux-kernel@...r.kernel.org
> > Subject: Re: [PATCH 1/2] staging: andriod: ion: Add ion_phys_get_by_id
> > function
> > 
> > On Sun,  4 Jan 2015 15:11:51 +0800
> > Feng Tang <feng.tang@...el.com> wrote:
> > 
> > > There is user case that user only knows the ion_handle idand
> > > needs to get the physical addr and len. So add this wrapper to
> > > meet this requirement.
> > 
> > What is the in-tree upstream user of this new function ? I don't see one
> > in your patches ?
> 
> That's true. We are working on enabling a new platform which heavily
> uses ION and some driver needs to use this API, so I guess there is some
> other plaforms may have the similar requirements. If you think this patch
> should be merged after there is an in-tree user, I'm OK with it :)
> 
> I assume that driver's author will start to push his drivers in batch soon.

We need to see those patches first, we can't add apis for no in-tree
user, otherwise they will just get ripped out.

thanks,

greg k-h
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