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Message-ID: <20071016145905.GA11214@suse.de>
Date: Tue, 16 Oct 2007 07:59:05 -0700
From: Greg KH <gregkh@...e.de>
To: Vitaliy Ivanov <vitalivanov@...il.com>
Cc: Pete Zaitcev <zaitcev@...hat.com>, Willy Tarreau <w@....eu>,
linux-usb-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [2.4 patch] Port of adutux driver from 2.6 kernel to 2.4.
On Tue, Oct 16, 2007 at 04:48:54PM +0300, Vitaliy Ivanov wrote:
> Pete,
>
> On Mon, 2007-10-15 at 20:30, Pete Zaitcev wrote:
>
> > > + in_end_size = le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize);
> > > + out_end_size = le16_to_cpu(dev->interrupt_out_endpoint->wMaxPacketSize);
> >
> > Did you verify if this works? We use pre-swapped descriptors in 2.4.
> > I suspect you allocate 256 times more memory than necessary.
>
> Just checked. Seems to be OK. At least printk shows shows it.
That's probably because you tested this on a little-endian machine :)
Pete is right, this code is incorrect for 2.4, drop the le16_to_cpu
function, the wMaxPacketSize variable is in native-endian form in 2.4
and early 2.6 versions.
thanks,
greg k-h
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