diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/misc/legousbtower.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c index aab320085eb..6664043f464 100644 --- a/drivers/usb/misc/legousbtower.c +++ b/drivers/usb/misc/legousbtower.c @@ -205,7 +205,7 @@ static DEFINE_MUTEX(open_disc_mutex); /* Structure to hold all of our device specific stuff */ struct lego_usb_tower { - struct semaphore sem; /* locks this structure */ + struct mutex lock; /* locks this structure */ struct usb_device* udev; /* save off the usb device pointer */ unsigned char minor; /* the starting minor number for this device */ @@ -361,7 +361,7 @@ static int tower_open (struct inode *inode, struct file *file) } /* lock this device */ - if (down_interruptible (&dev->sem)) { + if (mutex_lock_interruptible(&dev->lock)) { mutex_unlock(&open_disc_mutex); retval = -ERESTARTSYS; goto exit; @@ -421,7 +421,7 @@ static int tower_open (struct inode *inode, struct file *file) file->private_data = dev; unlock_exit: - up (&dev->sem); + mutex_unlock(&dev->lock); exit: dbg(2, "%s: leave, return value %d ", __FUNCTION__, retval); @@ -448,7 +448,7 @@ static int tower_release (struct inode *inode, struct file *file) } mutex_lock(&open_disc_mutex); - if (down_interruptible (&dev->sem)) { + if (mutex_lock_interruptible(&dev->lock)) { retval = -ERESTARTSYS; goto exit; } @@ -460,7 +460,9 @@ static int tower_release (struct inode *inode, struct file *file) } if (dev->udev == NULL) { /* the device was unplugged before the file was released */ - up (&dev->sem); /* unlock here as tower_delete frees dev */ + + /* unlock here as tower_delete frees dev */ + mutex_unlock(&dev->lock); tower_delete (dev); goto exit; } @@ -473,7 +475,7 @@ static int tower_release (struct inode *inode, struct file *file) dev->open_count = 0; unlock_exit: - up (&dev->sem); + mutex_unlock(&dev->lock); exit: mutex_unlock(&open_disc_mutex); @@ -586,7 +588,7 @@ static ssize_t tower_read (struct file *file, char __user *buffer, size_t count, dev = (struct lego_usb_tower *)file->private_data; /* lock this object */ - if (down_interruptible (&dev->sem)) { + if (mutex_lock_interruptible(&dev->lock)) { retval = -ERESTARTSYS; goto exit; } @@ -653,7 +655,7 @@ static ssize_t tower_read (struct file *file, char __user *buffer, size_t count, unlock_exit: /* unlock the device */ - up (&dev->sem); + mutex_unlock(&dev->lock); exit: dbg(2, "%s: leave, return value %d", __FUNCTION__, retval); @@ -675,7 +677,7 @@ static ssize_t tower_write (struct file *file, const char __user *buffer, size_t dev = (struct lego_usb_tower *)file->private_data; /* lock this object */ - if (down_interruptible (&dev->sem)) { + if (mutex_lock_interruptible(&dev->lock)) { retval = -ERESTARTSYS; goto exit; } @@ -737,7 +739,7 @@ static ssize_t tower_write (struct file *file, const char __user *buffer, size_t unlock_exit: /* unlock the device */ - up (&dev->sem); + mutex_unlock(&dev->lock); exit: dbg(2, "%s: leave, return value %d", __FUNCTION__, retval); @@ -862,7 +864,7 @@ static int tower_probe (struct usb_interface *interface, const struct usb_device goto exit; } - init_MUTEX (&dev->sem); + mutex_init(&dev->lock); dev->udev = udev; dev->open_count = 0; @@ -1007,16 +1009,16 @@ static void tower_disconnect (struct usb_interface *interface) /* give back our minor */ usb_deregister_dev (interface, &tower_class); - down (&dev->sem); + mutex_lock(&dev->lock); mutex_unlock(&open_disc_mutex); /* if the device is not opened, then we clean up right now */ if (!dev->open_count) { - up (&dev->sem); + mutex_unlock(&dev->lock); tower_delete (dev); } else { dev->udev = NULL; - up (&dev->sem); + mutex_unlock(&dev->lock); } info("LEGO USB Tower #%d now disconnected", (minor - LEGO_USB_TOWER_MINOR_BASE)); |