From: Eli Lindsey Date: Tue, 9 Mar 2010 06:15:33 +0000 (-0600) Subject: staging: frontier: switch semaphores to mutexes X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3504e0c87892c272d9784e12918910d74077da0d;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git staging: frontier: switch semaphores to mutexes This patch changes the use of semaphores in alphatrack.c and tranzport.c to mutexes at the suggestion of checkpatch.pl Signed-off-by: Eli Lindsey Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/frontier/alphatrack.c b/drivers/staging/frontier/alphatrack.c index ce4d663a3e5..4e52105e607 100644 --- a/drivers/staging/frontier/alphatrack.c +++ b/drivers/staging/frontier/alphatrack.c @@ -134,7 +134,7 @@ MODULE_PARM_DESC(min_interrupt_out_interval, /* Structure to hold all of our device specific stuff */ struct usb_alphatrack { - struct semaphore sem; /* locks this structure */ + struct mutex mtx; /* locks this structure */ struct usb_interface *intf; /* save off the usb interface pointer */ int open_count; /* number of times this port has been opened */ @@ -347,7 +347,7 @@ static int usb_alphatrack_open(struct inode *inode, struct file *file) } /* lock this device */ - if (down_interruptible(&dev->sem)) { + if (mutex_lock_interruptible(&dev->mtx)) { retval = -ERESTARTSYS; goto unlock_disconnect_exit; } @@ -390,7 +390,7 @@ static int usb_alphatrack_open(struct inode *inode, struct file *file) file->private_data = dev; unlock_exit: - up(&dev->sem); + mutex_unlock(&dev->mtx); unlock_disconnect_exit: mutex_unlock(&disconnect_mutex); @@ -413,7 +413,7 @@ static int usb_alphatrack_release(struct inode *inode, struct file *file) goto exit; } - if (down_interruptible(&dev->sem)) { + if (mutex_lock_interruptible(&dev->mtx)) { retval = -ERESTARTSYS; goto exit; } @@ -425,7 +425,7 @@ static int usb_alphatrack_release(struct inode *inode, struct file *file) if (dev->intf == NULL) { /* the device was unplugged before the file was released */ - up(&dev->sem); + mutex_unlock(&dev->mtx); /* unlock here as usb_alphatrack_delete frees dev */ usb_alphatrack_delete(dev); retval = -ENODEV; @@ -441,7 +441,7 @@ static int usb_alphatrack_release(struct inode *inode, struct file *file) dev->open_count = 0; unlock_exit: - up(&dev->sem); + mutex_unlock(&dev->mtx); exit: return retval; @@ -486,7 +486,7 @@ static ssize_t usb_alphatrack_read(struct file *file, char __user *buffer, goto exit; /* lock this object */ - if (down_interruptible(&dev->sem)) { + if (mutex_lock_interruptible(&dev->mtx)) { retval = -ERESTARTSYS; goto exit; } @@ -532,7 +532,7 @@ static ssize_t usb_alphatrack_read(struct file *file, char __user *buffer, unlock_exit: /* unlock the device */ - up(&dev->sem); + mutex_unlock(&dev->mtx); exit: return retval; @@ -556,7 +556,7 @@ static ssize_t usb_alphatrack_write(struct file *file, goto exit; /* lock this object */ - if (down_interruptible(&dev->sem)) { + if (mutex_lock_interruptible(&dev->mtx)) { retval = -ERESTARTSYS; goto exit; } @@ -627,7 +627,7 @@ static ssize_t usb_alphatrack_write(struct file *file, unlock_exit: /* unlock the device */ - up(&dev->sem); + mutex_unlock(&dev->mtx); exit: return retval; @@ -678,7 +678,7 @@ static int usb_alphatrack_probe(struct usb_interface *intf, dev_err(&intf->dev, "Out of memory\n"); goto exit; } - init_MUTEX(&dev->sem); + mutex_init(&dev->mtx); dev->intf = intf; init_waitqueue_head(&dev->read_wait); init_waitqueue_head(&dev->write_wait); @@ -835,7 +835,7 @@ static void usb_alphatrack_disconnect(struct usb_interface *intf) dev = usb_get_intfdata(intf); usb_set_intfdata(intf, NULL); - down(&dev->sem); + mutex_lock(&dev->mtx); minor = intf->minor; @@ -844,11 +844,11 @@ static void usb_alphatrack_disconnect(struct usb_interface *intf) /* if the device is not opened, then we clean up right now */ if (!dev->open_count) { - up(&dev->sem); + mutex_unlock(&dev->mtx); usb_alphatrack_delete(dev); } else { dev->intf = NULL; - up(&dev->sem); + mutex_unlock(&dev->mtx); } atomic_set(&dev->writes_pending, 0); diff --git a/drivers/staging/frontier/tranzport.c b/drivers/staging/frontier/tranzport.c index f9ab4f32daa..eed74f0fe0b 100644 --- a/drivers/staging/frontier/tranzport.c +++ b/drivers/staging/frontier/tranzport.c @@ -123,7 +123,7 @@ struct tranzport_cmd { /* Structure to hold all of our device specific stuff */ struct usb_tranzport { - struct semaphore sem; /* locks this structure */ + struct mutex mtx; /* locks this structure */ struct usb_interface *intf; /* save off the usb interface pointer */ int open_count; /* number of times this port opened */ struct tranzport_cmd (*ring_buffer)[RING_BUFFER_SIZE]; @@ -367,7 +367,7 @@ static int usb_tranzport_open(struct inode *inode, struct file *file) } /* lock this device */ - if (down_interruptible(&dev->sem)) { + if (mutex_lock_interruptible(&dev->mtx)) { retval = -ERESTARTSYS; goto unlock_disconnect_exit; } @@ -411,7 +411,7 @@ static int usb_tranzport_open(struct inode *inode, struct file *file) file->private_data = dev; unlock_exit: - up(&dev->sem); + mutex_unlock(&dev->mtx); unlock_disconnect_exit: mutex_unlock(&disconnect_mutex); @@ -434,7 +434,7 @@ static int usb_tranzport_release(struct inode *inode, struct file *file) goto exit; } - if (down_interruptible(&dev->sem)) { + if (mutex_lock_interruptible(&dev->mtx)) { retval = -ERESTARTSYS; goto exit; } @@ -446,7 +446,7 @@ static int usb_tranzport_release(struct inode *inode, struct file *file) if (dev->intf == NULL) { /* the device was unplugged before the file was released */ - up(&dev->sem); + mutex_unlock(&dev->mtx); /* unlock here as usb_tranzport_delete frees dev */ usb_tranzport_delete(dev); retval = -ENODEV; @@ -462,7 +462,7 @@ static int usb_tranzport_release(struct inode *inode, struct file *file) dev->open_count = 0; unlock_exit: - up(&dev->sem); + mutex_unlock(&dev->mtx); exit: return retval; @@ -512,7 +512,7 @@ static ssize_t usb_tranzport_read(struct file *file, char __user *buffer, goto exit; /* lock this object */ - if (down_interruptible(&dev->sem)) { + if (mutex_lock_interruptible(&dev->mtx)) { retval = -ERESTARTSYS; goto exit; } @@ -660,7 +660,7 @@ retval = 8; unlock_exit: /* unlock the device */ -up(&dev->sem); +mutex_unlock(&dev->mtx); exit: return retval; @@ -684,7 +684,7 @@ static ssize_t usb_tranzport_write(struct file *file, goto exit; /* lock this object */ - if (down_interruptible(&dev->sem)) { + if (mutex_lock_interruptible(&dev->mtx)) { retval = -ERESTARTSYS; goto exit; } @@ -753,7 +753,7 @@ static ssize_t usb_tranzport_write(struct file *file, unlock_exit: /* unlock the device */ - up(&dev->sem); + mutex_unlock(&dev->mtx); exit: return retval; @@ -802,7 +802,7 @@ static int usb_tranzport_probe(struct usb_interface *intf, dev_err(&intf->dev, "Out of memory\n"); goto exit; } - init_MUTEX(&dev->sem); + mutex_init(&dev->mtx); dev->intf = intf; init_waitqueue_head(&dev->read_wait); init_waitqueue_head(&dev->write_wait); @@ -942,18 +942,18 @@ static void usb_tranzport_disconnect(struct usb_interface *intf) mutex_lock(&disconnect_mutex); dev = usb_get_intfdata(intf); usb_set_intfdata(intf, NULL); - down(&dev->sem); + mutex_lock(&dev->mtx); minor = intf->minor; /* give back our minor */ usb_deregister_dev(intf, &usb_tranzport_class); /* if the device is not opened, then we clean up right now */ if (!dev->open_count) { - up(&dev->sem); + mutex_unlock(&dev->mtx); usb_tranzport_delete(dev); } else { dev->intf = NULL; - up(&dev->sem); + mutex_unlock(&dev->mtx); } mutex_unlock(&disconnect_mutex);