From: Grygorii Strashko <grygorii.strashko@ti.com>
Date: Thu, 25 Jun 2015 15:13:33 +0000 (+0300)
Subject: gpio: omap: prevent module from being unloaded while in use
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c23837ce73a0cb84ab046a6c0aace30fdd1e26f0;p=openwrt%2Fstaging%2Fblogic.git

gpio: omap: prevent module from being unloaded while in use

OMAP GPIO driver allowed to be built as loadable module, but it
doesn't set owner field in GPIO chip structure. As result,
module_get/put() API is not working and it's possible to unload
OMAP driver while in use:

  omap_gpio 48051000.gpio: REMOVING GPIOCHIP WITH GPIOS STILL REQUESTED

Hence, add missing configuration.

Cc: Tony Lindgren <tony@atomide.com>
Fixes: cac089f9026e ('gpio: omap: Allow building as a loadable module')
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---

diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index a0ad8030a7ef..61a731ff9a07 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -1187,6 +1187,7 @@ static int omap_gpio_probe(struct platform_device *pdev)
 	bank->irq = res->start;
 	bank->dev = dev;
 	bank->chip.dev = dev;
+	bank->chip.owner = THIS_MODULE;
 	bank->dbck_flag = pdata->dbck_flag;
 	bank->stride = pdata->bank_stride;
 	bank->width = pdata->bank_width;