From: Greg KH <greg@kroah.com>
To: Martin Fuzzey <mfuzzey@gmail.com>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>,
linux-usb <linux-usb@vger.kernel.org>,
netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: Problem with non aligned DMA in usbnet on ARM
Date: Wed, 11 Aug 2010 08:04:43 -0700 [thread overview]
Message-ID: <20100811150443.GB8867@kroah.com> (raw)
In-Reply-To: <AANLkTimX46QKAGhiyo8AodaXVjuzoxr5-5z2V4gRr1Vu@mail.gmail.com>
On Wed, Aug 11, 2010 at 12:11:52PM +0200, Martin Fuzzey wrote:
> > You haven't said what HCD you're using.
> >
> imx21_hcd (submitted by me and mainlined in 2.6.34)
>
> > In that case, I'd say the HCD must handle misaligned URBs itself so
> > behaviour is consistent between all implementations on different
> > platforms.
> >
> Here is a pointer to the thread where it was stated that HCD's don't
> have to handle this.
>
> http://kerneltrap.org/mailarchive/linux-usb/2009/4/20/5528164
No, that thread is about stack vs. heap allocations, not about alignment
issues.
thanks,
greg k-h
next prev parent reply other threads:[~2010-08-11 15:04 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-11 9:41 Problem with non aligned DMA in usbnet on ARM Martin Fuzzey
[not found] ` <AANLkTi=ycg=adcizNWKMCb7EdfDANM=6Es7r_gF1LbhV-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-08-11 9:54 ` Russell King - ARM Linux
2010-08-11 10:11 ` Martin Fuzzey
2010-08-11 15:04 ` Greg KH [this message]
2010-08-11 16:08 ` Martin Fuzzey
[not found] ` <AANLkTimmJDKbh3_pRY_ASKvjsf4YuuUMh3edh5LvDv-p-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-08-11 17:42 ` Greg KH
[not found] ` <20100811174238.GA12382-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2010-08-11 19:07 ` Martin Fuzzey
2010-08-11 20:13 ` Greg KH
[not found] ` <20100811201332.GB10379-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2010-08-11 22:31 ` Martin Fuzzey
2010-08-12 17:01 ` Matthieu CASTET
2010-08-11 19:10 ` Oliver Neukum
2010-08-11 9:59 ` Matthieu CASTET
[not found] ` <4C627479.4060400-ITF29qwbsa/QT0dZR+AlfA@public.gmane.org>
2010-08-11 11:38 ` Martin Fuzzey
[not found] ` <4C62C7B3.2030706@nvidia.com>
[not found] ` <20100811203505.GA463@n2100.arm.linux.org.uk>
[not found] ` <20100811203505.GA463-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2010-08-11 22:20 ` Martin Fuzzey
2010-08-11 22:47 ` Russell King - ARM Linux
[not found] ` <4C632217.9000608-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2010-08-12 17:08 ` Matthieu CASTET
2010-08-13 10:06 ` Martin Fuzzey
[not found] ` <4C65193E.4090807-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2010-08-13 10:58 ` Oliver Neukum
[not found] ` <201008131258.55016.oneukum-l3A5Bk7waGM@public.gmane.org>
2010-08-13 13:42 ` David Brownell
[not found] ` <732137.54230.qm-g47maUHHHF/6X00i2u5GFvu2YVrzzGjVVpNB7YpNyf8@public.gmane.org>
2010-08-13 13:53 ` Oliver Neukum
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