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

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Message-Id: <201301081049.15118.arnd@arndb.de>
Date:	Tue, 8 Jan 2013 10:49:14 +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 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).

	Arnd
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