Re: [PATCH][MIPS][5/6]: AR7: serial hack

To:	tsbogend@alpha.franken.de (Thomas Bogendoerfer)
Subject:	Re: [PATCH][MIPS][5/6]: AR7: serial hack
From:	Alan Cox <alan@lxorguk.ukuu.org.uk>
Date:	Tue, 18 Mar 2008 14:01:33 +0000
Cc:	Matteo Croce <technoboy85@gmail.com>, linux-mips@linux-mips.org, Florian Fainelli <florian@openwrt.org>, Felix Fietkau <nbd@openwrt.org>, Nicolas Thill <nico@openwrt.org>, linux-serial@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>
In-reply-to:	<20080318133015.GA7239@alpha.franken.de>
Organization:	Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903
Original-recipient:	rfc822;linux-mips@linux-mips.org
References:	<200803120221.25044.technoboy85@gmail.com> <200803141646.09645.technoboy85@gmail.com> <20080315104009.GA6533@alpha.franken.de> <200803161645.06364.technoboy85@gmail.com> <20080318133015.GA7239@alpha.franken.de>
Sender:	linux-mips-bounce@linux-mips.org

> Is there a good reason, why we don't check for BOTH_EMPTY in
> serial8250_console_putchar() ? To match the 2.6.10 behaviour we

A very good one - we have at least 1 byte of FIFO and the serial-ethernet
magic console devices also use that fifo emptying entirely to deduce when
to send a new packet.

> would need that and this would fix the AR7 case without any
> special handling.

If the AR7 is an 8250 why does it need special handling? and indeed why
does serial work on it except for console - or does that fail too.

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