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Message-ID: <4e5e4f48-ec79-2c99-a321-83c0e383991a@xilinx.com>
Date: Tue, 24 Apr 2018 14:27:47 +0200
From: Michal Simek <michal.simek@...inx.com>
To: Matt Redfearn <matt.redfearn@...s.com>,
Michal Simek <michal.simek@...inx.com>,
<linux-kernel@...r.kernel.org>, <monstr@...str.eu>
CC: stable <stable@...r.kernel.org>, Jiri Slaby <jslaby@...e.com>,
Douglas Anderson <dianders@...omium.org>,
<linux-serial@...r.kernel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jeffy Chen <jeffy.chen@...k-chips.com>
Subject: Re: [PATCH] serial: 8250_early: Setup divider when uartclk is passed
Hi Matt,
On 23.4.2018 15:21, Matt Redfearn wrote:
> Hi Michal
>
> On 23/04/18 10:18, Michal Simek wrote:
>> device->baud is always non zero value because it is checked already in
>> early_serial8250_setup() before init_port is called.
>
> True, currently init_port is only called from the one location and so
> the test is a little redundant, though I don't see the harm in testing
> both inputs to the divisor calculation immediately before use such that
> any future call path avoids setting a bad divisor.
I will let others to decide.
>
>>
>> Fixes: 0ff3ab701963 ("serial: 8250_early: Only set divisor if valid
>> clk & baud")
>> Cc: stable <stable@...r.kernel.org>
>
> Even if the test is dropped going forward, I wouldn't consider it's
> presence a "bug" such that a fix needs to be backported.
Not a problem with not adding this to stable.
Thanks,
Michal
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