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Date:   Fri, 28 Jun 2019 14:55:34 +0200
From:   Wolfram Sang <wsa@the-dreams.de>
To:     Eugeniu Rosca <erosca@de.adit-jv.com>
Cc:     Geert Uytterhoeven <geert@linux-m68k.org>,
        Eugeniu Rosca <roscaeugeniu@gmail.com>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jiri Slaby <jslaby@suse.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
        Vinod Koul <vkoul@kernel.org>,
        Dan Williams <dan.j.williams@intel.com>,
        Wolfram Sang <wsa+renesas@sang-engineering.com>,
        "open list:SERIAL DRIVERS" <linux-serial@vger.kernel.org>,
        Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
        dmaengine@vger.kernel.org,
        "George G . Davis" <george_davis@mentor.com>
Subject: Re: [PATCH 0/2] serial: sh-sci: Fix .flush_buffer() issues
Message-ID: <20190628125534.GB1458@ninjato>
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> > If a serial port is used as a console, the port is used for both DMA
> > (normal use) and PIO (serial console output).  The latter can have a
> > negative impact on the former, aggravating existing bugs, or triggering
> > more races, even in the hardware.  So I think it's better to be more
> > cautious and keep DMA disabled for the console.
>=20
> Thanks for the extensive and comprehensible replies.
> No more questions from my end.
> Looking forward to picking the patches from vanilla/stable trees.

If you could formally add such a tag:

Tested-by: <your email>

(maybe also Acked-by: or Reviewed-by:, dunno if you think it is
apropriate)

to the patches, this would be much appreciated and will usually speed up
the patches getting applied.

Thanks for your help!


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