linux-kernel - Re: [PATCH v1 11/15] serial: imx: initialized DMA w/o HW flow enabled

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Message-ID: <CAH=tA9G2sPaV5uoWrW0FwHd4FUtPL-A8=jgp3p6Y9ijxDLgdTw@mail.gmail.com>
Date:	Wed, 6 May 2015 19:08:13 +0300
From:	Nicolae Rosia <nicolae.rosia@...il.com>
To:	jiwang <jiada_wang@...tor.com>
Cc:	Sebastian Andrzej Siewior <sebastian@...akpoint.cc>,
	gregkh@...uxfoundation.org, jslaby@...e.cz,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	anton_bondarenko@...tor.com, dirk.behme@...bosch.com,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: Re: [PATCH v1 11/15] serial: imx: initialized DMA w/o HW flow enabled

Hi,
I believe I'm also affected by this BUG. I'm receiving lots of 0 and 1
(ASCII, as presented by cat /dev/ttymxcX) and RX buffer is
overflowing.

> the firmware only supports imx6 series, AFAIK,
> I checked with Freescale imx6 support team, due to
> licensing issue, I am not entitled to upstream FSL SDMA firmware.
> so seems currently disable SDMA support for uart is our only option
> at the moment.
>

Have you submited a patch for this issue?
How do I disable SDMA?

Best regards,
Nicolae Rosia
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