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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1471432466.4887.134.camel@linux.intel.com>
Date:	Wed, 17 Aug 2016 14:14:26 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Thorsten Leemhuis <regressions@...mhuis.info>,
	dinh.linux@...iebear.net
Cc:	Dinh Nguyen <dinguyen@...nel.org>, heikki.krogerus@...ux.intel.com,
	peter@...leysoftware.com,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [RFC RESEND] serial: 8250: fix regression in 8250 uart driver

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@...iebear.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@...ux.intel.com>
Intel Finland Oy