Re: [PATCH] usb: ehci: make HC see up-to-date qh/qtd descriptor ASAP

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Subject: Re: [PATCH] usb: ehci: make HC see up-to-date qh/qtd descriptor ASAP
From: Chen Peter-B29397 <B29397@xxxxxxxxxxxxx>
Date: Wed, 31 Aug 2011 12:33:29 +0000
Accept-language: en-US
Cc: Chen Peter-B29397 <B29397@xxxxxxxxxxxxx>, Greg KH <greg@xxxxxxxxx>, Mark Salter <msalter@xxxxxxxxxx>, "ming.lei@xxxxxxxxxxxxx" <ming.lei@xxxxxxxxxxxxx>, Russell King <linux@xxxxxxxxxxxxxxxx>, "linux-usb@xxxxxxxxxxxxxxx" <linux-usb@xxxxxxxxxxxxxxx>, "stern@xxxxxxxxxxxxxxxxxxx" <stern@xxxxxxxxxxxxxxxxxxx>, "linux-omap@xxxxxxxxxxxxxxx" <linux-omap@xxxxxxxxxxxxxxx>, "linux-arm-kernel@xxxxxxxxxxxxxxxxxxx" <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>
In-reply-to: <20110831084922.GA8777@e102144-lin.cambridge.arm.com>
References: <1314720193-26577-1-git-send-email-ming.lei@canonical.com> <1314722311.2344.64.camel@deneb.redhat.com> <20110830172642.GE3464@e102144-lin.cambridge.arm.com> <20110830174859.GA23098@kroah.com> <20110830175432.GG3464@e102144-lin.cambridge.arm.com> <5484D075-A7DA-41B7-B8FA-9B6D72A23723@freescale.com> <20110831084922.GA8777@e102144-lin.cambridge.arm.com>
Thread-topic: [PATCH] usb: ehci: make HC see up-to-date qh/qtd descriptor ASAP


Best Regard,
Peter Chen
 



On Aug 31, 2011, at 4:49 PM, Will Deacon wrote:

> On Wed, Aug 31, 2011 at 01:23:47AM +0100, Chen Peter-B29397 wrote:
>> One question: why this write buffer issue did not happen at UP ARM V7 platform, whose dma buffer
>> also uncache, but bufferable?
> 
> Which CPU was on this platform?

Cortex A8 UP system (freescale i.MX5x platform)
> 
> Will
> 


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References:
- [PATCH] usb: ehci: make HC see up-to-date qh/qtd descriptor ASAP
  - From: ming . lei
- Re: [PATCH] usb: ehci: make HC see up-to-date qh/qtd descriptor ASAP
  - From: Mark Salter
- Re: [PATCH] usb: ehci: make HC see up-to-date qh/qtd descriptor ASAP
  - From: Will Deacon
- Re: [PATCH] usb: ehci: make HC see up-to-date qh/qtd descriptor ASAP
  - From: Greg KH
- Re: [PATCH] usb: ehci: make HC see up-to-date qh/qtd descriptor ASAP
  - From: Will Deacon
- Re: [PATCH] usb: ehci: make HC see up-to-date qh/qtd descriptor ASAP
  - From: Chen Peter-B29397
- Re: [PATCH] usb: ehci: make HC see up-to-date qh/qtd descriptor ASAP
  - From: Will Deacon

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