From: Mark Salter <msalter@redhat.com>
To: Ming Lei <ming.lei@canonical.com>
Cc: Alan Stern <stern@rowland.harvard.edu>,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
Greg KH <greg@kroah.com>,
linux-omap@vger.kernel.org, Santosh <santosh.shilimkar@ti.com>,
USB list <linux-usb@vger.kernel.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] usb: ehci: fix update qtd->token in qh_append_tds
Date: Mon, 29 Aug 2011 12:24:48 -0400 [thread overview]
Message-ID: <1314635090.2344.53.camel@deneb.redhat.com> (raw)
In-Reply-To: <CACVXFVNTGsaw2jLosqrTOdnZX399VfE7dWuVYvLcN50_bsa+tQ@mail.gmail.com>
On Mon, 2011-08-29 at 23:55 +0800, Ming Lei wrote:
> If writing to coherent memory can't reach physical memory immediately on
> other ARCHs, the problem can still happen on these ARCHs. But I am
> not sure if there are these kind of ARCHs except for ARM.
If there is write buffering which prevents outside bus masters from
seeing the data, can we really call it coherent memory?
--Mark
WARNING: multiple messages have this Message-ID (diff)
From: msalter@redhat.com (Mark Salter)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] usb: ehci: fix update qtd->token in qh_append_tds
Date: Mon, 29 Aug 2011 12:24:48 -0400 [thread overview]
Message-ID: <1314635090.2344.53.camel@deneb.redhat.com> (raw)
In-Reply-To: <CACVXFVNTGsaw2jLosqrTOdnZX399VfE7dWuVYvLcN50_bsa+tQ@mail.gmail.com>
On Mon, 2011-08-29 at 23:55 +0800, Ming Lei wrote:
> If writing to coherent memory can't reach physical memory immediately on
> other ARCHs, the problem can still happen on these ARCHs. But I am
> not sure if there are these kind of ARCHs except for ARM.
If there is write buffering which prevents outside bus masters from
seeing the data, can we really call it coherent memory?
--Mark
next prev parent reply other threads:[~2011-08-29 16:25 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-27 14:48 [PATCH] usb: ehci: fix update qtd->token in qh_append_tds ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw
2011-08-27 14:48 ` ming.lei at canonical.com
2011-08-27 15:03 ` Santosh
2011-08-27 15:03 ` Santosh
[not found] ` <4E590756.9030307-l0cyMroinI0@public.gmane.org>
2011-08-27 15:18 ` Ming Lei
2011-08-27 15:18 ` Ming Lei
[not found] ` <CACVXFVPPPUsntdCT=m=vRJ9XVksn6rGMzqJVvdD+sj=eOcTadg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-08-27 15:46 ` Santosh
2011-08-27 15:46 ` Santosh
[not found] ` <1314456515-16419-1-git-send-email-ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
2011-08-27 15:13 ` Greg KH
2011-08-27 15:13 ` Greg KH
2011-08-27 15:33 ` Ming Lei
2011-08-27 15:33 ` Ming Lei
2011-08-27 16:07 ` Greg KH
2011-08-27 16:07 ` Greg KH
2011-08-27 16:57 ` Ming Lei
2011-08-27 16:57 ` Ming Lei
[not found] ` <CACVXFVNz_ic_PPM_vNn1Dz85A2z94kRFso4rcqrvJfuLSqRSCg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-08-27 17:20 ` Ming Lei
2011-08-27 17:20 ` Ming Lei
2011-08-27 20:11 ` Alan Stern
2011-08-27 20:11 ` Alan Stern
2011-08-28 3:35 ` Ming Lei
2011-08-28 3:35 ` Ming Lei
2011-08-27 20:06 ` Alan Stern
2011-08-27 20:06 ` Alan Stern
2011-08-28 3:13 ` Ming Lei
2011-08-28 3:13 ` Ming Lei
[not found] ` <CACVXFVP8Lr=ggH4FjvMQd6r9poLAT1r+_S3Z-NimP0i08DsQ8g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-08-28 17:00 ` Alan Stern
2011-08-28 17:00 ` Alan Stern
2011-08-28 23:36 ` Russell King - ARM Linux
2011-08-28 23:36 ` Russell King - ARM Linux
2011-08-29 1:51 ` Alan Stern
2011-08-29 1:51 ` Alan Stern
2011-08-29 8:52 ` Russell King - ARM Linux
2011-08-29 8:52 ` Russell King - ARM Linux
2011-08-29 13:57 ` Alan Stern
2011-08-29 13:57 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1108290951250.2525-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2011-08-29 15:55 ` Ming Lei
2011-08-29 15:55 ` Ming Lei
2011-08-29 16:24 ` Mark Salter [this message]
2011-08-29 16:24 ` Mark Salter
[not found] ` <Pine.LNX.4.44L0.1108281233270.3742-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2011-08-29 14:25 ` Ming Lei
2011-08-29 14:25 ` Ming Lei
[not found] ` <CACVXFVOvw6bSfcOYR2RWJO=k1WLgSCUygmSwZmtRDdM_tZNWEA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-08-29 15:03 ` Alan Stern
2011-08-29 15:03 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1108291046540.2525-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2011-08-29 15:21 ` Ming Lei
2011-08-29 15:21 ` Ming Lei
2011-08-29 16:33 ` Alan Stern
2011-08-29 16:33 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1108291218040.2525-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2011-08-30 14:02 ` Ming Lei
2011-08-30 14:02 ` Ming Lei
2011-08-27 16:31 ` Sergei Shtylyov
2011-08-27 16:31 ` Sergei Shtylyov
-- strict thread matches above, loose matches on Subject: below --
2011-08-27 14:46 ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw
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