linux-kernel - Re: [PATCH] drivers: char: hvc: add arm JTAG DCC console support

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Date:	Fri, 14 Jan 2011 15:49:29 -0800
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Tony Lindgren <tony@...mide.com>
CC:	Daniel Walker <dwalker@...eaurora.org>,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>,
	Nicolas Pitre <nico@...xnic.net>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Mike Frysinger <vapier@...too.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH] drivers: char: hvc: add arm JTAG DCC console support

On 01/14/2011 11:19 AM, Tony Lindgren wrote:
> * Stephen Boyd <sboyd@...eaurora.org> [101207 11:00]:
>> On 12/01/2010 12:20 PM, Stephen Boyd wrote:
>>> Definitely for TX since it seems like a redundant loop, but I agree RX
>>> code has changed. Instead of
>>>
>>> If RX buffer full
>>> Poll for RX buffer full
>>> Read character from RX buffer
>>>
>>> we would have
>>>
>>> If RX buffer full
>>> Read character from RX buffer
>>>
>>> which doesn't seem all that different assuming the RX buffer doesn't go
>>> from full to empty between the If and Poll steps. Hopefully Tony knows more.
>>>
>>
>> Tony, any thoughts?
>
> Sorry for the delay, looks like I'm only 1 month behind with email..
> Sounds like it should work to me. I can try it out if you point me
> to a patch.

I think you acked the patches to make this change. You can test them out
by applying the "hvc_dcc cleanups and fixes" patches (Message-Id:
<1292875718-7980-1-git-send-email-sboyd@...eaurora.org>) on top of this
patch. They were sent as a reply to this thread.

Stephen

-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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