From: greg@kroah.com (Greg KH)
To: linux-arm-kernel@lists.infradead.org
Subject: 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
WARNING: multiple messages have this Message-ID (diff)
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: 42+ 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
2010-08-11 9:41 ` Martin Fuzzey
2010-08-11 9:54 ` Russell King - ARM Linux
2010-08-11 9:54 ` Russell King - ARM Linux
2010-08-11 10:11 ` Martin Fuzzey
2010-08-11 10:11 ` Martin Fuzzey
2010-08-11 15:04 ` Greg KH [this message]
2010-08-11 15:04 ` Greg KH
2010-08-11 16:08 ` Martin Fuzzey
2010-08-11 16:08 ` Martin Fuzzey
2010-08-11 17:42 ` Greg KH
2010-08-11 17:42 ` Greg KH
2010-08-11 19:07 ` Martin Fuzzey
2010-08-11 19:07 ` Martin Fuzzey
2010-08-11 20:13 ` Greg KH
2010-08-11 20:13 ` Greg KH
2010-08-11 22:31 ` Martin Fuzzey
2010-08-11 22:31 ` Martin Fuzzey
2010-08-12 17:01 ` Matthieu CASTET
2010-08-12 17:01 ` Matthieu CASTET
2010-08-11 19:10 ` Oliver Neukum
2010-08-11 19:10 ` Oliver Neukum
2010-08-11 9:59 ` Matthieu CASTET
2010-08-11 9:59 ` Matthieu CASTET
2010-08-11 11:38 ` Martin Fuzzey
2010-08-11 11:38 ` Martin Fuzzey
2010-08-11 15:54 ` Gary King
2010-08-11 20:35 ` Russell King - ARM Linux
2010-08-11 22:20 ` Martin Fuzzey
2010-08-11 22:20 ` Martin Fuzzey
2010-08-11 22:47 ` Russell King - ARM Linux
2010-08-11 22:47 ` Russell King - ARM Linux
2010-08-12 17:08 ` Matthieu CASTET
2010-08-12 17:08 ` Matthieu CASTET
2010-08-13 10:06 ` Martin Fuzzey
2010-08-13 10:06 ` Martin Fuzzey
2010-08-13 10:58 ` Oliver Neukum
2010-08-13 10:58 ` Oliver Neukum
2010-08-13 13:42 ` David Brownell
2010-08-13 13:42 ` David Brownell
2010-08-13 13:53 ` Oliver Neukum
2010-08-13 13:53 ` Oliver Neukum
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100811150443.GB8867@kroah.com \
--to=greg@kroah.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.