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

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Date:	Tue, 07 Dec 2010 11:10:36 -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 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?

-- 
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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