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Commit 9f9f0761 authored by malattia@linux.it's avatar malattia@linux.it Committed by Len Brown
Browse files

sony-laptop: add locking on accesses to the ioport and global vars 



Better avoid having ioport commands mixing and global variables reading/writing.

Signed-off-by: default avatarMattia Dongili <malattia@linux.it>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 5f3d2898

drivers/misc/sony-laptop.c

+31 −12
Original line number Diff line number Diff line
@@ -928,6 +928,7 @@ struct sony_pic_dev { 
	struct sony_pic_ioport	*cur_ioport;

	struct list_head	interrupts;

	struct list_head	ioports;

	struct mutex		lock;

};



static struct sony_pic_dev spic_dev = {
@@ -1224,7 +1225,7 @@ static u8 sony_pic_call3(u8 dev, u8 fn, u8 v) 
#define SONYPI_CAMERA_STATUS_READY 	0x2

#define SONYPI_CAMERA_STATUS_POSITION	0x4



static int sony_pic_camera_ready(void)

static int __sony_pic_camera_ready(void)

{

	u8 v;
@@ -1239,6 +1240,7 @@ static int sony_pic_camera_off(void) 
		return -ENODEV;

	}



	mutex_lock(&spic_dev.lock);

	wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_PICTURE,

				SONYPI_CAMERA_MUTE_MASK),

			ITERATIONS_SHORT);
@@ -1247,20 +1249,23 @@ static int sony_pic_camera_off(void) 
		sony_pic_call2(0x91, 0);

		spic_dev.camera_power = 0;

	}

	mutex_unlock(&spic_dev.lock);

	return 0;

}



static int sony_pic_camera_on(void)

{

	int i, j, x;

	int result = 0;



	if (!camera) {

		printk(KERN_WARNING DRV_PFX "camera control not enabled\n");

		return -ENODEV;

	}



	mutex_lock(&spic_dev.lock);

	if (spic_dev.camera_power)

		return 0;

		goto out_unlock;



	for (j = 5; j > 0; j--) {
@@ -1269,7 +1274,7 @@ static int sony_pic_camera_on(void) 
		sony_pic_call1(0x93);



		for (i = 400; i > 0; i--) {

			if (sony_pic_camera_ready())

			if (__sony_pic_camera_ready())

				break;

			msleep(10);

		}
@@ -1279,7 +1284,8 @@ static int sony_pic_camera_on(void) 


	if (j == 0) {

		printk(KERN_WARNING DRV_PFX "failed to power on camera\n");

		return -ENODEV;

		result = -ENODEV;

		goto out_unlock;

	}



	wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_CONTROL,
@@ -1287,6 +1293,9 @@ static int sony_pic_camera_on(void) 
			ITERATIONS_SHORT);



	spic_dev.camera_power = 1;



out_unlock:

	mutex_unlock(&spic_dev.lock);

	return 0;

}
@@ -1314,11 +1323,15 @@ static ssize_t sony_pic_camerapower_store(struct device *dev, 
static ssize_t sony_pic_camerapower_show(struct device *dev,

		struct device_attribute *attr, char *buffer)

{

	return snprintf(buffer, PAGE_SIZE, "%d\n", spic_dev.camera_power);

	ssize_t count;

	mutex_lock(&spic_dev.lock);

	count = snprintf(buffer, PAGE_SIZE, "%d\n", spic_dev.camera_power);

	mutex_unlock(&spic_dev.lock);

	return count;

}



/* bluetooth subsystem power state */

static void sony_pic_set_bluetoothpower(u8 state)

static void __sony_pic_set_bluetoothpower(u8 state)

{

	state = !!state;

	if (spic_dev.bluetooth_power == state)
@@ -1337,7 +1350,9 @@ static ssize_t sony_pic_bluetoothpower_store(struct device *dev, 
		return -EINVAL;



	value = simple_strtoul(buffer, NULL, 10);

	sony_pic_set_bluetoothpower(value);

	mutex_lock(&spic_dev.lock);

	__sony_pic_set_bluetoothpower(value);

	mutex_unlock(&spic_dev.lock);



	return count;

}
@@ -1345,7 +1360,11 @@ static ssize_t sony_pic_bluetoothpower_store(struct device *dev, 
static ssize_t sony_pic_bluetoothpower_show(struct device *dev,

		struct device_attribute *attr, char *buffer)

{

	return snprintf(buffer, PAGE_SIZE, "%d\n", spic_dev.bluetooth_power);

	ssize_t count = 0;

	mutex_lock(&spic_dev.lock);

	count = snprintf(buffer, PAGE_SIZE, "%d\n", spic_dev.bluetooth_power);

	mutex_unlock(&spic_dev.lock);

	return count;

}



/* fan speed */
@@ -1518,7 +1537,7 @@ static int sonypi_misc_ioctl(struct inode *ip, struct file *fp, 
	u16 val16;

	int value;



	/*down(&sonypi_device.lock);*/

	mutex_lock(&spic_dev.lock);

	switch (cmd) {

	case SONYPI_IOCGBRT:

		if (sony_backlight_device == NULL) {
@@ -1602,7 +1621,7 @@ static int sonypi_misc_ioctl(struct inode *ip, struct file *fp, 
			ret = -EFAULT;

			break;

		}

		sony_pic_set_bluetoothpower(val8);

		__sony_pic_set_bluetoothpower(val8);

		break;

	/* FAN Controls */

	case SONYPI_IOCGFAN:
@@ -1633,7 +1652,7 @@ static int sonypi_misc_ioctl(struct inode *ip, struct file *fp, 
	default:

		ret = -EINVAL;

	}

	/*up(&sonypi_device.lock);*/

	mutex_unlock(&spic_dev.lock);

	return ret;

}
@@ -1673,7 +1692,6 @@ static int sonypi_compat_init(void) 
	}



	init_waitqueue_head(&sonypi_compat.fifo_proc_list);

	/*init_MUTEX(&sonypi_device.lock);*/



	if (minor != -1)

		sonypi_misc_device.minor = minor;
@@ -2004,6 +2022,7 @@ static int sony_pic_add(struct acpi_device *device) 
	spic_dev.acpi_dev = device;

	strcpy(acpi_device_class(device), "sony/hotkey");

	spic_dev.model = sony_pic_detect_device_type();

	mutex_init(&spic_dev.lock);



	/* read _PRS resources */

	result = sony_pic_possible_resources(device);