x86, intel-mid: Check get_gpio_by_name() error code on platform code

This patch does cleanup on all intel mid platform code that uses
gpio_get_by_name() function. From now on they should check for any error
code instead of only hardcoded -1.

There are no functional changes from this change.
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Link: http://lkml.kernel.org/r/1389913624-9149-3-git-send-email-david.a.cohen@linux.intel.comSigned-off-by: H. Peter Anvin <hpa@linux.intel.com>

arch/x86/platform/intel-mid/device_libs/platform_emc1403.c

@@ -22,7 +22,9 @@ static void __init *emc1403_platform_data(void *info)
 	int intr = get_gpio_by_name("thermal_int");
 	int intr2nd = get_gpio_by_name("thermal_alert");
 
-	if (intr == -1 || intr2nd == -1)
+	if (intr < 0)
+		return NULL;
+	if (intr2nd < 0)
 		return NULL;
 
 	i2c_info->irq = intr + INTEL_MID_IRQ_OFFSET;

arch/x86/platform/intel-mid/device_libs/platform_gpio_keys.c

@@ -66,7 +66,7 @@ static int __init pb_keys_init(void)
 		gb[i].gpio = get_gpio_by_name(gb[i].desc);
 		pr_debug("info[%2d]: name = %s, gpio = %d\n", i, gb[i].desc,
 					gb[i].gpio);
-		if (gb[i].gpio == -1)
+		if (gb[i].gpio < 0)
 			continue;
 
 		if (i != good)

arch/x86/platform/intel-mid/device_libs/platform_lis331.c

@@ -21,7 +21,9 @@ static void __init *lis331dl_platform_data(void *info)
 	int intr = get_gpio_by_name("accel_int");
 	int intr2nd = get_gpio_by_name("accel_2");
 
-	if (intr == -1 || intr2nd == -1)
+	if (intr < 0)
+		return NULL;
+	if (intr2nd < 0)
 		return NULL;
 
 	i2c_info->irq = intr + INTEL_MID_IRQ_OFFSET;

arch/x86/platform/intel-mid/device_libs/platform_max7315.c

@@ -48,7 +48,7 @@ static void __init *max7315_platform_data(void *info)
 	gpio_base = get_gpio_by_name(base_pin_name);
 	intr = get_gpio_by_name(intr_pin_name);
 
-	if (gpio_base == -1)
+	if (gpio_base < 0)
 		return NULL;
 	max7315->gpio_base = gpio_base;
 	if (intr != -1) {

arch/x86/platform/intel-mid/device_libs/platform_mpu3050.c

@@ -19,7 +19,7 @@ static void *mpu3050_platform_data(void *info)
 	struct i2c_board_info *i2c_info = info;
 	int intr = get_gpio_by_name("mpu3050_int");
 
-	if (intr == -1)
+	if (intr < 0)
 		return NULL;
 
 	i2c_info->irq = intr + INTEL_MID_IRQ_OFFSET;

arch/x86/platform/intel-mid/device_libs/platform_pmic_gpio.c

@@ -26,7 +26,7 @@ static void __init *pmic_gpio_platform_data(void *info)
 	static struct intel_pmic_gpio_platform_data pmic_gpio_pdata;
 	int gpio_base = get_gpio_by_name("pmic_gpio_base");
 
-	if (gpio_base == -1)
+	if (gpio_base < 0)
 		gpio_base = 64;
 	pmic_gpio_pdata.gpio_base = gpio_base;
 	pmic_gpio_pdata.irq_base = gpio_base + INTEL_MID_IRQ_OFFSET;

arch/x86/platform/intel-mid/device_libs/platform_tca6416.c

@@ -34,10 +34,10 @@ static void *tca6416_platform_data(void *info)
 	gpio_base = get_gpio_by_name(base_pin_name);
 	intr = get_gpio_by_name(intr_pin_name);
 
-	if (gpio_base == -1)
+	if (gpio_base < 0)
 		return NULL;
 	tca6416.gpio_base = gpio_base;
-	if (intr != -1) {
+	if (intr >= 0) {
 		i2c_info->irq = intr + INTEL_MID_IRQ_OFFSET;
 		tca6416.irq_base = gpio_base + INTEL_MID_IRQ_OFFSET;
 	} else {