From: Grygorii Strashko <grygorii.strashko@ti.com>
Date: Thu, 25 Jun 2015 17:30:50 +0000 (+0300)
Subject: gpiolib: irqchip: prevent driver unloading if gpio is used as irq only
X-Git-Tag: omap-for-v4.3/fixes-rc1~96^2~45
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5b76e79c772648991e700f004205e9ac861c77c0;p=pandora-kernel.git

gpiolib: irqchip: prevent driver unloading if gpio is used as irq only

Now nothing prevents GPIO driver from being unloaded if its gpios
were requested as GPIO IRQs only (without calling gpio_request()).

Hence, add calls of try_module_get()/module_put() into
gpiochip_irq_reqres/relres() to track such scenario properly.

Cc: Johan Hovold <johan@kernel.org>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---

Reading git-diff-tree failed