[PATCH] serial: pl011: protect attribute read from NULL platform data struct

[Lee Jones]

On Mon, 13 May 2013, Linus Walleij wrote:

> On Thu, May 9, 2013 at 2:50 PM, Lee Jones <lee.jones at linaro.org> wrote:
> 
> > It's completely feasible that platform data will be empty i.e. when
> > booting with Device Tree with no device AUXDATA. So we must protect
> > it's use in these use-cases, or risk a kernel Oops.
> >
> > Cc: Russell King <linux at arm.linux.org.uk>
> > Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
> > Cc: Jiri Slaby <jslaby at suse.cz>
> > Cc: linux-serial at vger.kernel.org
> > Cc: Arnd Bergmann <arnd at arndb.de>
> > Signed-off-by: Lee Jones <lee.jones at linaro.org>
> > ---
> > *******                                                        *******
> > If this issue has not already been fixed, this patch should be applied
> > during the v3.10 -rc:s, as it fixes a serious bug which was introduced
> > in the merge-window.
> > *******                                                        *******
> 
> Reviewed-by: Linus Walleij <linus.walleij at linaro.org>
> 
> You should probably put Greg on To: so that he picks this up for
> the -rc:s ASAP.

I spoke with Greg yesterday. He's catching up on mail.

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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