linux-kernel - Re: [PATCH] tty/serial: Skip 'NULL' char after console break when sysrq enabled

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Message-Id: <20151224.114346.690529944368284120.davem@davemloft.net>
Date:	Thu, 24 Dec 2015 11:43:46 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	vijay.ac.kumar@...cle.com
Cc:	gregkh@...uxfoundation.org, sparclinux@...r.kernel.org,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	karl.volz@...cle.com
Subject: Re: [PATCH] tty/serial: Skip 'NULL' char after console break when
 sysrq enabled

From: Vijay Kumar <vijay.ac.kumar@...cle.com>
Date: Wed, 23 Dec 2015 10:55:33 -0800

> When sysrq is triggered from console, serial driver for SUN hypervisor
> console receives a console break and enables the sysrq. It expects a valid
> sysrq char following with break. Meanwhile if driver receives 'NULL'
> ASCII char then it disables sysrq and sysrq handler will never be invoked.
> 
> This fix skips calling uart sysrq handler when 'NULL' is received while
> sysrq is enabled.
> 
> Signed-off-by: Vijay Kumar <vijay.ac.kumar@...cle.com>
> Acked-by: Karl Volz <karl.volz@...cle.com>

Applied, thank you.
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