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

From: Sebastian Andrzej Siewior
Date: Mon Sep 08 2014 - 12:33:34 EST


* Sebastian Andrzej Siewior | 2014-09-08 17:15:01 [+0200]:

>* Frans Klaver | 2014-09-08 16:46:18 [+0200]:
>
>>- ncurses based applications (vi, less) don't play nice for me on the
>> console with this series. less doesn't show me anything. vi doesn't
>> return to console properly.
>
>Can you give a test case

Okay. less. My am335x-evm freezes after a while for no obvious reason.
The data that hits the RX fifo is still received but the TX won't do
anything. The DMA request is pending, the FIFO level is @64 bytes and
the UART doesn't make any progress.
On beagle-board I see what you described: less on a file and nothing
happens.
Disabling DMA seems to help fix the problem omap3. Nothing changes for
am335x.

Sebastian
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/