linux-kernel - Re: [PATCH] serial: of-serial: zero-out struct of_serial

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Date:	Thu, 30 Oct 2014 22:55 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Florian Fainelli <f.fainelli@...il.com>
Cc:	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	jslaby@...e.cz, gregkh@...uxfoundation.org,
	devicetree@...r.kernel.org, jingchang.lu@...escale.com,
	gregory.0xf0@...il.com
Subject: Re: [PATCH] serial: of-serial: zero-out struct of_serial_info

On Thursday 30 October 2014 14:18:33 Florian Fainelli wrote:
> of_platform_serial_probe() invokes of_platform_serial_setup() with a
> kmalloc'd struct of_serial_info cookie, which is not much of a problem
> for most of the struct of_serial_info fields we access but info->clk.
> 
> On platforms which do not provide a clock phandle for their UART nodes
> but do provide a 'clock-frequency' property, we basically leave the
> info->clk variable uninitialized, and this craps out during
> suspend/resume with oopses, crashes or warnings in the clock code.
> 
> Fix this by using kzalloc() which also zeroes-out the structure and
> provides an initialized info->clk member set to NULL.
> 
> Fixes: 2dea53bf57783 ("serial: of-serial: add PM suspend/resume support")
> Fixes: e34b9c94b6e8d ("[POWERPC] of_serial: add port type checking")
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
> 

I thought I'd acked this patch before, maybe someone else sent the same
one. This is definitely required, so

Acked-by: Arnd Bergmann <arnd@...db.de>
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