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

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Date:	Thu, 6 Nov 2014 10:33:34 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Florian Fainelli <f.fainelli@...il.com>
Cc:	Arnd Bergmann <arnd@...db.de>, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org, jslaby@...e.cz,
	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 Tue, Nov 04, 2014 at 10:23:49AM -0800, Florian Fainelli wrote:
> On 10/30/2014 02:55 PM, Arnd Bergmann wrote:
> > 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>
> > 
> 
> Thanks, so who's taking that patch? Let me know if I need to resubmit
> targeting a specific tree.

Someone else sent this before you did, and I took that version instead,
sorry.

greg k-h
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