linux-kernel - Re: [PATCH] USB: serial: f81534: fix division by zero on line-speed change

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Message-ID: <Y4c56VLgznt3Xo7C@kroah.com>
Date:   Wed, 30 Nov 2022 12:09:29 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Johan Hovold <johan@...nel.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, Ji-Ze Hong <hpeter@...il.com>
Subject: Re: [PATCH] USB: serial: f81534: fix division by zero on line-speed
 change

On Tue, Nov 29, 2022 at 03:18:19PM +0100, Johan Hovold wrote:
> The driver leaves the line speed unchanged in case a requested speed is
> not supported. Make sure to handle the case where the current speed is
> B0 (hangup) without dividing by zero when determining the clock source.
> 
> Fixes: 3aacac02f385 ("USB: serial: f81534: add high baud rate support")
> Cc: stable@...r.kernel.org      # 4.16
> Cc: Ji-Ze Hong (Peter Hong) <hpeter@...il.com>
> Signed-off-by: Johan Hovold <johan@...nel.org>

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>