linux-kernel - Re: seeing some junk characters on boot console with v4.9-rc1-3-g14155ca

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Message-ID: <CAL_JsqKgv5ez6a=F7ZxPLhZu7aHP+5ZSgaEiHx27zHk=x7iouA@mail.gmail.com>
Date:   Tue, 18 Oct 2016 14:39:21 -0500
From:   Rob Herring <robh@...nel.org>
To:     Mugunthan V N <mugunthanvnm@...com>
Cc:     Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
        Tony Lindgren <tony@...mide.com>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Sekhar Nori <nsekhar@...com>, Vignesh R <vigneshr@...com>
Subject: Re: seeing some junk characters on boot console with v4.9-rc1-3-g14155ca

On Tue, Oct 18, 2016 at 7:08 AM, Mugunthan V N <mugunthanvnm@...com> wrote:
> Hi
>
> I am seeing some junk characters on uart boot console on DRA72x platform
> [1] and even on other TI platforms, did a bisect and found the commit
> "761ed4a94582" broke it first.
>
> By reverting below two commit, I don't see the issue logs [2].
>
> 761ed4a94582 "tty:serial_core: convert uart_close to use tty_port_close"
> a5a2b13074fd "serial: core: fix potential NULL pointer dereference"

Can you test with the patch titled "tty: serial_core: Fix serial
console crash on port shutdown"[1]? It may be disabling the console
when it shouldn't.

Rob

[1] http://www.gossamer-threads.com/lists/linux/kernel/2546399