linux-kernel - Re: [PATCH] USB: serial: Fix read regression in 2.6.31.

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Message-ID: <20091009190955.GA958@kroah.com>
Date:	Fri, 9 Oct 2009 12:09:55 -0700
From:	Greg KH <greg@...ah.com>
To:	Johan Hovold <jhovold@...il.com>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-usb@...r.kernel.org,
	e9hack <e9hack@...glemail.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] USB: serial: Fix read regression in 2.6.31.

On Fri, Oct 09, 2009 at 08:41:13PM +0200, Johan Hovold wrote:
> On Fri, Oct 09, 2009 at 10:56:02AM -0700, Greg KH wrote:
> > On Sun, Sep 20, 2009 at 10:18:36PM +0200, Johan Hovold wrote:
> > > Use ASYNCB_INITIALIZED to determine when to stop reading.
> > > 
> > > Port count can no longer be used to determine when to stop reading from
> > > the device as it can be zero when the first read callbacks are made (see
> > > tty_port_block_til_read where port count is temporarily decremented
> > > during serial_open).
> > > 
> > > Signed-off-by: Johan Hovold <jhovold@...il.com>
> > > ---
> > > 
> > > Hi, 
> > > 
> > > Here's a patch which fixes the port count issue for all drivers. I only
> > > have access to an ftdi device at the moment so that's the only driver
> > > I've been able to test (against latest git with latest patches from
> > > Greg's tree). 
> > 
> > Hm, this doesn't apply on top of the other ftdi patches.  Could you
> > respin this?
> 
> There were some issues with that patch, so please disregard that one.
> Sorry. There are probably still some problems with some of the other
> drivers (at least theoretical ones) due to the tty changes that broke
> ftdi, but there is currently no patch to fix them all.

Ok, dropped :)

thanks,

greg k-h
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