linux-kernel - Re: add Packet hub driver for Topcliff Platform controller hub

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Date:	Tue, 8 Jan 2013 11:56:47 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	masa-korg@....okisemi.com,
	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org,
	Tomoya MORINAGA <tomoya.rohm@...il.com>
Subject: Re: add Packet hub driver for Topcliff Platform controller hub

On Tuesday 08 January 2013, Dan Carpenter wrote:
> On Tue, Jan 08, 2013 at 10:49:14AM +0000, Arnd Bergmann wrote:
> > On Monday 07 January 2013, Dan Carpenter wrote:
> > > Sorry my question is about an old patch.  Smatch complains because we
> > > only pass a PAGE_SIZE buffer to sysfs files so the test for
> > > "if (count > PCH_PHUB_OROM_SIZE) {" makes it think we are overflowing.
> > > In fact, count is never more than 4096 so there is no overflow, but I
> > > also think that it means only the first 4096 bytes of the firmware gets
> > > updated.
> > 
> > I think it works correctly as long as user space keeps writing into the
> > bin file when getting short write return (4096 bytes).
> > 
> 
> Ah.  Ok.  I misunderstood.  I've looked through it again and you're
> right.
> 
> Sorry for the noise.

No worries, the report looked totally plausible and I also had to look
up how bin files work.

	Arnd
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