From: Tomi Valkeinen <tomi.valkeinen@ti.com>
Date: Thu, 9 Jan 2014 12:50:29 +0000 (+0200)
Subject: pinctrl: single: fix infinite loop caused by bad mask
X-Git-Tag: v3.14-rc1~144^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad5d25fef8f9459a9f67ec5fbae94287fdea3247;p=pandora-kernel.git

pinctrl: single: fix infinite loop caused by bad mask

commit 4e7e8017a80e1 (pinctrl: pinctrl-single:
enhance to configure multiple pins of different modules) improved
support for pinctrl-single,bits option, but also caused a regression
in parsing badly configured mask data.

If the masks in DT data are not quite right,
pcs_parse_bits_in_pinctrl_entry() can end up in an infinite loop,
trashing memory at the same time.

Add a check to verify that each loop actually removes bits from the
'mask', so that the loop can eventually end.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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