linux-kernel - RE: [PATCH v2] usb: gadget: return the right length in ffs_epfile

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Date:	Tue, 4 Mar 2014 23:38:32 +0000
From:	"Liu, Chuansheng" <chuansheng.liu@...el.com>
To:	"balbi@...com" <balbi@...com>,
	Michal Nazarewicz <mina86@...a86.com>
CC:	Robert Baldyga <r.baldyga@...sung.com>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"david.a.cohen@...ux.intel.com" <david.a.cohen@...ux.intel.com>
Subject: RE: [PATCH v2] usb: gadget: return the right length in
 ffs_epfile_io()

Hi Balbi,

> -----Original Message-----
> From: Felipe Balbi [mailto:balbi@...com]
> Sent: Wednesday, March 05, 2014 3:56 AM
> To: Michal Nazarewicz
> Cc: Robert Baldyga; Felipe Balbi; Sergei Shtylyov; Liu, Chuansheng;
> gregkh@...uxfoundation.org; linux-usb@...r.kernel.org;
> linux-kernel@...r.kernel.org; david.a.cohen@...ux.intel.com
> Subject: Re: [PATCH v2] usb: gadget: return the right length in ffs_epfile_io()
> 
> On Tue, Mar 04, 2014 at 08:53:40PM +0100, Michal Nazarewicz wrote:
> > >> On 03/04/2014 10:34 AM, Chuansheng Liu wrote:
> > >> >@@ -845,12 +845,14 @@ static ssize_t ffs_epfile_io(struct file *file,
> struct ffs_io_data *io_data)
> > >> >  			 * we may end up with more data then user space has
> > >> >  			 * space for.
> > >> >  			 */
> > >> >-			ret = ep->status;
> > >> >-			if (io_data->read && ret > 0 &&
> > >> >-			    unlikely(copy_to_user(io_data->buf, data,
> > >> >-						  min_t(size_t, ret,
> > >> >-						  io_data->len))))
> > >> >-				ret = -EFAULT;
> > >> >+				ret = ep->status;
> >
> > On Tue, Mar 04 2014, Felipe Balbi wrote:
> > >>    Why the indentation jumped suddenly to the right?
> >
> > > On Tue, Mar 04, 2014 at 08:01:15PM +0300, Sergei Shtylyov wrote:
> > > because it was wrong before ;-)
> >
> > Yep.  It looks like Robert's [2e4c7553: add aio support] introduced an
> > if-else-if-else flow but did not indent the code and I didn't caught it
> > when reviewing that patch.
> 
> it's in my testing/next now, I also fixed the comment indentation which
> was also wrong.
Thanks your help and the fix for comment indentation also:)

Best Regards
Chuansheng
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