Re: [RFC RESEND] serial: 8250: fix regression in 8250 uart driver

From	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Newsgroups	linux.kernel
Subject	Re: [RFC RESEND] serial: 8250: fix regression in 8250 uart driver
Date	2016-08-17 13:20 +0200
Message-ID	<s7733-g9-23@gated-at.bofh.it> (permalink)
References	<rJMTL-7lq-1@gated-at.bofh.it> <rJSZb-2YW-5@gated-at.bofh.it> <rJYUW-6QY-15@gated-at.bofh.it> <rJYUW-6QY-13@gated-at.bofh.it> <rQrKx-38v-15@gated-at.bofh.it>
Organization	Intel Finland Oy

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On Sat, 2016-07-02 at 13:53 +0200, Thorsten Leemhuis wrote:
> On 14.06.2016 18:00, Andy Shevchenko wrote:
> > 
> > On Tue, 2016-06-14 at 10:27 -0500, dinh.linux@anniebear.net wrote:
> > > 
> > > > 
> > > > On Mon, 2016-06-13 at 21:59 -0500, Dinh Nguyen wrote:
> > > Does this mean that the 8250_dw.c driver can no longer use DMA?
> > 
> > It means that previously the use of DMA engine whatever was used is
> > not
> > correct in your case. There is no issues in UART driver, the issue
> > is in
> > DMA controller driver.
> > 
> > I'm working on a quirk that will allow user to enforce PIO mode for
> > Rx/Tx or both. In that case if DMA controller can't be fixed you
> > still
> > might use DMA for Tx.
> 
> What's the status of this issue? Just wondering, as this issue is
> listed
> in my regression reports for 4.7 and it seems nothing much happened
> for
> more than a week now – which is a bad sign as the 4.7 release seems
> only
> a week or two away.

I sent a v2 of the series for internal review, same you may found on
[1]. If Heikki is okay to that I'll send it here.

[1] https://bitbucket.org/andy-shev/linux/branch/topic%2Fdw%2Fqrk

-- 
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy

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Re: [RFC RESEND] serial: 8250: fix regression in 8250 uart driver Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-08-17 13:20 +0200
  Re: [RFC RESEND] serial: 8250: fix regression in 8250 uart driver Heikki Krogerus <heikki.krogerus@linux.intel.com> - 2016-08-17 13:30 +0200
  Re: [RFC RESEND] serial: 8250: fix regression in 8250 uart driver Dinh Nguyen <dinguyen@kernel.org> - 2016-08-23 16:10 +0200
    Re: [RFC RESEND] serial: 8250: fix regression in 8250 uart driver Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2016-08-23 17:10 +0200

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