Messages in this thread | | | Date | Fri, 12 Sep 2014 11:51:22 +0200 | From | Sebastian Andrzej Siewior <> | Subject | Re: [PATCH 09/16] tty: serial: 8250_dma: Add a TX trigger workaround for AM33xx |
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On 09/12/2014 11:40 AM, Frans Klaver wrote:
> I'm not sure. I just reproduced this on a boneblack, using your uart_v9 > branch. > >> This problem only pops-up if you use DMA. With disabled DMA you don't >> see this, right? > > I get the lockup both with and without DMA enabled. Here's the 8250 > config I use. Our full .config is attached in case it may provide > something relevant.
Hmm. I have a bone black here. Can you tell what you did to get this lockup? The port configuration (unless 115200 8N1) and what you did to get this lockup.
> Something that may also help: when I have a lockup on the boneblack, dma > is enabled and something is written to console like I described earlier, > I get the following bad irq:
> Full dmesg is also attached.
This one should be stuffed by this: "[RFC] ARM: edma: unconditionally ack the error interrupt" https://lkml.org/lkml/2014/9/10/714
> Hope you find something useful in there.
> Thanks, > Frans
Sebastian
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