From: Russell King <rmk+lkml@arm.linux.org.uk>
To: Alex Williamson <alex.williamson@hp.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] backup timer for UARTs that lose interrupts
Date: Thu, 10 Nov 2005 10:44:19 +0000 [thread overview]
Message-ID: <20051110104419.GA20693@flint.arm.linux.org.uk> (raw)
In-Reply-To: <1131495392.9657.9.camel@tdi>
On Tue, Nov 08, 2005 at 05:16:32PM -0700, Alex Williamson wrote:
> I was hoping that would be the solution too. I just tried enabling
> UART_BUG_TXEN to double check my previous results. Somehow it makes the
> problem much, much worse. Instead of being the nuisance it usually is,
> it seems like the UART gets way behind on transmitting bits. So it
> would probably prevent the unattended reboot stall since we kick it
> every time we want to transmit, but it renders the UART completely
> unusable as a console. I can't even get it caught up enough to login
> via the serial console w/ UART_BUG_TXEN enabled on the port. Thanks,
Ok, would you mind fixing the patch so it isn't screwing up the
default use of up->timer please? You may notice that this timer
is already used, and overwriting up->timer.function is a one-way
process in your patch (which kills off the point of serial8250_timeout).
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
next prev parent reply other threads:[~2005-11-10 10:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-08 20:27 [PATCH] backup timer for UARTs that lose interrupts Alex Williamson
2005-11-08 23:23 ` Russell King
2005-11-09 0:16 ` Alex Williamson
2005-11-10 10:44 ` Russell King [this message]
2005-11-10 13:38 ` Alex Williamson
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