linux-kernel - Re: [PATCH v8 00/18] 8250-core based serial driver for OMAP + DMA

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Message-ID: <20140910141554.GC22315@ci00147.xsens-tech.local>
Date:	Wed, 10 Sep 2014 16:15:55 +0200
From:	Frans Klaver <frans.klaver@...ns.com>
To:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
CC:	<linux-serial@...r.kernel.org>, <tony@...mide.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<linux-kernel@...r.kernel.org>, <balbi@...com>,
	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v8 00/18] 8250-core based serial driver for OMAP + DMA

On Tue, Sep 09, 2014 at 09:41:20PM +0200, Sebastian Andrzej Siewior wrote:
> On 09/08/2014 08:33 PM, Frans Klaver wrote:
> > Thanks. I'll give it a spin on Wednesday.
> 
> Could you please pull the upcoming v9 first?
> 
>  git://git.breakpoint.cc/bigeasy/linux.git uart_v9_pre1
> 
> This solves a few of my am335x related issues.

Using v9_pre1, I get a kernel panic in edma_dma_pause() on echan->edesc
being NULL. I do get data before this happens. This is at high speed,
high rate. No mention of the irq having too much to do, though. The more
data I transmit, the more likely this is to occur.

I don't currently have the setup to lower the baudrate. I would probably
need to reproduce this on a beaglebone, instead of our custom board.
I'll see if I can do that.

If you need more info, just let me know.

Thanks,
Frans
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