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Date:   Mon, 11 Apr 2022 14:14:24 +0200
From:   Uwe =?utf-8?Q?Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>
To:     Tony Lindgren <tony@atomide.com>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Andy Shevchenko <andriy.shevchenko@intel.com>,
        Ilpo =?utf-8?B?SsOkcnZpbmVu?= <ilpo.jarvinen@linux.intel.com>,
        Jiri Slaby <jirislaby@kernel.org>,
        Johan Hovold <johan@kernel.org>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        linux-serial@vger.kernel.org, linux-omap@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Steffen Trumtrar <s.trumtrar@pengutronix.de>
Subject: Re: [PATCHv2] serial: 8250: Fix runtime PM for start_tx() for empty
 buffer
Message-ID: <20220411121424.7pc3jjsqglxbfakt@pengutronix.de>
References: <20220411111657.16744-1-tony@atomide.com>
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On Mon, Apr 11, 2022 at 02:16:57PM +0300, Tony Lindgren wrote:
> Commit 932d596378b0 ("serial: 8250: Return early in .start_tx() if there
> are no chars to send") caused a regression where the drivers implementing
> runtime PM stopped idling. This is because serial8250_rpm_put_tx() is now
> unbalanced on early return, it normally gets called at __stop_tx().
>=20
> Fixes: 932d596378b0 ("serial: 8250: Return early in .start_tx() if there =
are no chars to send")
> Cc: Steffen Trumtrar <s.trumtrar@pengutronix.de>
> Cc: Uwe Kleine-K=F6nig <u.kleine-koenig@pengutronix.de>
> Signed-off-by: Tony Lindgren <tony@atomide.com>

Reviewed-by: Uwe Kleine-K=F6nig <u.kleine-koenig@pengutronix.de>

Thanks for cleaning up behind me,
Uwe

--=20
Pengutronix e.K.                           | Uwe Kleine-K=F6nig            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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