From: Grygorii Strashko <grygorii.strashko@ti.com>
Date: Thu, 25 Sep 2014 16:09:23 +0000 (+0300)
Subject: gpiolib: irqchip: use irq_find_mapping while removing irqchip
X-Git-Tag: fixes-against-v3.18-rc2~140^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e3893386b90500d7f26fec3170bf96f67d3e557e;p=pandora-kernel.git

gpiolib: irqchip: use irq_find_mapping while removing irqchip

There is no guarantee that VIRQs will be allocated sequentially
for gpio irqchip in gpiochip_irqchip_add().
Therefore, it's unsafe to dispose VIRQ in gpiochip_irqchip_remove()
basing on index relatively to stored irq_base value.

Hence, use irq_find_mapping for VIRQ finding  in gpiochip_irqchip_remove()
instead of irq_base + index.

Reported-by: Wang, Yalin <Yalin.Wang@sonymobile.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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