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From:   John Ogness <john.ogness@linutronix.de>
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To:     Chen-Yu Tsai <wenst@chromium.org>, Tony Lindgren <tony@atomide.com>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jiri Slaby <jirislaby@kernel.org>,
        Andy Shevchenko <andriy.shevchenko@intel.com>,
        Dhruva Gole <d-gole@ti.com>,
        Ilpo =?utf-8?Q?J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>,
        Johan Hovold <johan@kernel.org>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        linux-omap@vger.kernel.org,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
        =?utf-8?Q?N=C3=ADcolas_F=2E_R=2E_A=2E_Prado?= 
        <nfraprado@collabora.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        linux-mediatek@lists.infradead.org
Subject: Re: [PATCH v12 1/1] serial: core: Start managing serial controllers
 to enable runtime PM
In-Reply-To: <20230602083335.GA181647@google.com>
References: <20230525113034.46880-1-tony@atomide.com>
 <20230602083335.GA181647@google.com>
Date:   Fri, 02 Jun 2023 12:19:28 +0206
Message-ID: <87a5xii33r.fsf@jogness.linutronix.de>
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On 2023-06-02, Chen-Yu Tsai <wenst@chromium.org> wrote:
> This patch, in linux-next since 20230601, unfortunately breaks
> MediaTek based Chromebooks. The kernel hangs during the probe of the
> serial ports, which use the 8250_mtk driver.

Are you sure it is this patch? Have you bisected it?

Unfortunately next-20230601 also brought in a series that added
spinlocking to the 8250 driver. That may be the issue here instead.

For 8250 bug reports we really need to bisection.

John Ogness