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: Mattia Dongili <malattia@linux.it> Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
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5f3d2898d7
commit
9f9f076171
1 changed files with 31 additions and 12 deletions
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@ -928,6 +928,7 @@ struct sony_pic_dev {
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struct sony_pic_ioport *cur_ioport;
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struct list_head interrupts;
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struct list_head ioports;
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struct mutex lock;
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};
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static struct sony_pic_dev spic_dev = {
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@ -1224,7 +1225,7 @@ static u8 sony_pic_call3(u8 dev, u8 fn, u8 v)
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#define SONYPI_CAMERA_STATUS_READY 0x2
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#define SONYPI_CAMERA_STATUS_POSITION 0x4
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static int sony_pic_camera_ready(void)
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static int __sony_pic_camera_ready(void)
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{
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u8 v;
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@ -1239,6 +1240,7 @@ static int sony_pic_camera_off(void)
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return -ENODEV;
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}
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mutex_lock(&spic_dev.lock);
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wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_PICTURE,
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SONYPI_CAMERA_MUTE_MASK),
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ITERATIONS_SHORT);
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@ -1247,20 +1249,23 @@ static int sony_pic_camera_off(void)
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sony_pic_call2(0x91, 0);
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spic_dev.camera_power = 0;
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}
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mutex_unlock(&spic_dev.lock);
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return 0;
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}
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static int sony_pic_camera_on(void)
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{
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int i, j, x;
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int result = 0;
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if (!camera) {
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printk(KERN_WARNING DRV_PFX "camera control not enabled\n");
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return -ENODEV;
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}
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mutex_lock(&spic_dev.lock);
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if (spic_dev.camera_power)
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return 0;
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goto out_unlock;
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for (j = 5; j > 0; j--) {
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@ -1269,7 +1274,7 @@ static int sony_pic_camera_on(void)
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sony_pic_call1(0x93);
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for (i = 400; i > 0; i--) {
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if (sony_pic_camera_ready())
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if (__sony_pic_camera_ready())
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break;
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msleep(10);
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}
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@ -1279,7 +1284,8 @@ static int sony_pic_camera_on(void)
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if (j == 0) {
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printk(KERN_WARNING DRV_PFX "failed to power on camera\n");
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return -ENODEV;
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result = -ENODEV;
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goto out_unlock;
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}
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wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_CONTROL,
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@ -1287,6 +1293,9 @@ static int sony_pic_camera_on(void)
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ITERATIONS_SHORT);
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spic_dev.camera_power = 1;
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out_unlock:
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mutex_unlock(&spic_dev.lock);
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return 0;
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}
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@ -1314,11 +1323,15 @@ static ssize_t sony_pic_camerapower_store(struct device *dev,
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static ssize_t sony_pic_camerapower_show(struct device *dev,
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struct device_attribute *attr, char *buffer)
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{
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return snprintf(buffer, PAGE_SIZE, "%d\n", spic_dev.camera_power);
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ssize_t count;
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mutex_lock(&spic_dev.lock);
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count = snprintf(buffer, PAGE_SIZE, "%d\n", spic_dev.camera_power);
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mutex_unlock(&spic_dev.lock);
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return count;
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}
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/* bluetooth subsystem power state */
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static void sony_pic_set_bluetoothpower(u8 state)
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static void __sony_pic_set_bluetoothpower(u8 state)
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{
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state = !!state;
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if (spic_dev.bluetooth_power == state)
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@ -1337,7 +1350,9 @@ static ssize_t sony_pic_bluetoothpower_store(struct device *dev,
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return -EINVAL;
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value = simple_strtoul(buffer, NULL, 10);
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sony_pic_set_bluetoothpower(value);
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mutex_lock(&spic_dev.lock);
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__sony_pic_set_bluetoothpower(value);
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mutex_unlock(&spic_dev.lock);
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return count;
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}
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@ -1345,7 +1360,11 @@ static ssize_t sony_pic_bluetoothpower_store(struct device *dev,
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static ssize_t sony_pic_bluetoothpower_show(struct device *dev,
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struct device_attribute *attr, char *buffer)
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{
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return snprintf(buffer, PAGE_SIZE, "%d\n", spic_dev.bluetooth_power);
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ssize_t count = 0;
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mutex_lock(&spic_dev.lock);
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count = snprintf(buffer, PAGE_SIZE, "%d\n", spic_dev.bluetooth_power);
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mutex_unlock(&spic_dev.lock);
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return count;
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}
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/* fan speed */
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@ -1518,7 +1537,7 @@ static int sonypi_misc_ioctl(struct inode *ip, struct file *fp,
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u16 val16;
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int value;
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/*down(&sonypi_device.lock);*/
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mutex_lock(&spic_dev.lock);
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switch (cmd) {
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case SONYPI_IOCGBRT:
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if (sony_backlight_device == NULL) {
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@ -1602,7 +1621,7 @@ static int sonypi_misc_ioctl(struct inode *ip, struct file *fp,
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ret = -EFAULT;
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break;
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}
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sony_pic_set_bluetoothpower(val8);
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__sony_pic_set_bluetoothpower(val8);
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break;
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/* FAN Controls */
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case SONYPI_IOCGFAN:
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@ -1633,7 +1652,7 @@ static int sonypi_misc_ioctl(struct inode *ip, struct file *fp,
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default:
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ret = -EINVAL;
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}
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/*up(&sonypi_device.lock);*/
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mutex_unlock(&spic_dev.lock);
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return ret;
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}
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@ -1673,7 +1692,6 @@ static int sonypi_compat_init(void)
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}
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init_waitqueue_head(&sonypi_compat.fifo_proc_list);
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/*init_MUTEX(&sonypi_device.lock);*/
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if (minor != -1)
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sonypi_misc_device.minor = minor;
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@ -2004,6 +2022,7 @@ static int sony_pic_add(struct acpi_device *device)
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spic_dev.acpi_dev = device;
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strcpy(acpi_device_class(device), "sony/hotkey");
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spic_dev.model = sony_pic_detect_device_type();
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mutex_init(&spic_dev.lock);
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/* read _PRS resources */
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result = sony_pic_possible_resources(device);
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