patches.kzm9g/0019-mmc-simplify-mmc_cd_gpio_request-by-removing-two-par.patch

From 6859f92c44996d7337c5d3a1dbfbbb43af00a3c4 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Thu, 9 Feb 2012 22:57:07 +0100
Subject: mmc: simplify mmc_cd_gpio_request() by removing two parameters

Calculate the IRQ number, using gpio_to_irq() and use fixed flags: trigger
on both edges. This makes two out of four arguments of the
mmc_cd_gpio_request() function redundant.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
(cherry picked from commit c9b0546a59293cabf54c85e1218da595af3274ff)

Signed-off-by: Simon Horman <horms@verge.net.au>
---
 drivers/mmc/core/cd-gpio.c  | 13 +++++++++----
 include/linux/mmc/cd-gpio.h |  3 +--
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/mmc/core/cd-gpio.c b/drivers/mmc/core/cd-gpio.c
index 082202a..29de31e 100644
--- a/drivers/mmc/core/cd-gpio.c
+++ b/drivers/mmc/core/cd-gpio.c
@@ -28,13 +28,17 @@ static irqreturn_t mmc_cd_gpio_irqt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-int mmc_cd_gpio_request(struct mmc_host *host, unsigned int gpio,
-			unsigned int irq, unsigned long flags)
+int mmc_cd_gpio_request(struct mmc_host *host, unsigned int gpio)
 {
 	size_t len = strlen(dev_name(host->parent)) + 4;
-	struct mmc_cd_gpio *cd = kmalloc(sizeof(*cd) + len, GFP_KERNEL);
+	struct mmc_cd_gpio *cd;
+	int irq = gpio_to_irq(gpio);
 	int ret;
 
+	if (irq < 0)
+		return irq;
+
+	cd = kmalloc(sizeof(*cd) + len, GFP_KERNEL);
 	if (!cd)
 		return -ENOMEM;
 
@@ -45,7 +49,8 @@ int mmc_cd_gpio_request(struct mmc_host *host, unsigned int gpio,
 		goto egpioreq;
 
 	ret = request_threaded_irq(irq, NULL, mmc_cd_gpio_irqt,
-				   flags, cd->label, host);
+				   IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+				   cd->label, host);
 	if (ret < 0)
 		goto eirqreq;
 
diff --git a/include/linux/mmc/cd-gpio.h b/include/linux/mmc/cd-gpio.h
index a8e4697..cefaba0 100644
--- a/include/linux/mmc/cd-gpio.h
+++ b/include/linux/mmc/cd-gpio.h
@@ -12,8 +12,7 @@
 #define MMC_CD_GPIO_H
 
 struct mmc_host;
-int mmc_cd_gpio_request(struct mmc_host *host, unsigned int gpio,
-			unsigned int irq, unsigned long flags);
+int mmc_cd_gpio_request(struct mmc_host *host, unsigned int gpio);
 void mmc_cd_gpio_free(struct mmc_host *host);
 
 #endif
-- 
1.7.10.2.565.gbd578b5