----- Forwarded message from Benoit Boissinot <[email protected]> -----
sorry, i forgot to reply all...
From: Benoit Boissinot <[email protected]>
To: Jon Smirl <[email protected]>
Subject: Re: 2.6.13-rc6-mm1
User-Agent: Mutt/1.5.10i
On Sun, Aug 21, 2005 at 06:11:57PM -0400, Jon Smirl wrote:
> On 8/21/05, Benoit Boissinot <[email protected]> wrote:
> > On Sun, Aug 21, 2005 at 01:40:31PM -0400, Jon Smirl wrote:
> > > On 8/21/05, Benoit Boissinot <[email protected]> wrote:
> > > [snip]
> > >
> > > Somewhere there is a mistake in the white space processing code of the
> > > firmware driver. Before this patch we had inconsistent handling of
> > > whitespace and sysfs attributes. This patch forces it to be consistent
> > > and will shake out all of the places in the drivers where it is
> > > handled wrong. Sysfs attributes are now stripped of leading and
> > > trailing white space before being handed to the device driver.
> >
> > ok, i found it. If i do echo 1, it will read '1\n', will
> > remove the '\n' and send '1' to ops->store.
> > Then it will re-read '\n' and send '' to ops->store.
> > And it will loop...
>
> Look at the length being passed in, isn't it set to zero for the second case?
>
yes, it is set to zero, but the '\n' will be stripped and stay in the buffer.
Since flush_write_buffer returns 0, ppos will not be incremented and we
have an endless loop.
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