diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/misc/auerswald.c | 45 |
1 files changed, 24 insertions, 21 deletions
diff --git a/drivers/usb/misc/auerswald.c b/drivers/usb/misc/auerswald.c index df7e1ecc810..498fd478992 100644 --- a/drivers/usb/misc/auerswald.c +++ b/drivers/usb/misc/auerswald.c @@ -31,6 +31,7 @@ #include <linux/init.h> #include <linux/wait.h> #include <linux/usb.h> +#include <linux/mutex.h> /*-------------------------------------------------------------------*/ /* Debug support */ @@ -232,7 +233,7 @@ typedef struct auerscon /* USB device context */ typedef struct { - struct semaphore mutex; /* protection in user context */ + struct mutex mutex; /* protection in user context */ char name[20]; /* name of the /dev/usb entry */ unsigned int dtindex; /* index in the device table */ struct usb_device * usbdev; /* USB device handle */ @@ -1376,7 +1377,7 @@ static int auerchar_open (struct inode *inode, struct file *file) if (cp == NULL) { return -ENODEV; } - if (down_interruptible (&cp->mutex)) { + if (mutex_lock_interruptible(&cp->mutex)) { return -ERESTARTSYS; } @@ -1405,7 +1406,7 @@ static int auerchar_open (struct inode *inode, struct file *file) cp->open_count++; ccp->auerdev = cp; dbg("open %s as /dev/%s", cp->dev_desc, cp->name); - up (&cp->mutex); + mutex_unlock(&cp->mutex); /* file IO stuff */ file->f_pos = 0; @@ -1413,7 +1414,7 @@ static int auerchar_open (struct inode *inode, struct file *file) return nonseekable_open(inode, file); /* Error exit */ -ofail: up (&cp->mutex); +ofail: mutex_unlock(&cp->mutex); auerchar_delete (ccp); return ret; } @@ -1440,14 +1441,14 @@ static int auerchar_ioctl (struct inode *inode, struct file *file, unsigned int up (&ccp->mutex); return -ENODEV; } - if (down_interruptible (&cp->mutex)) { + if (mutex_lock_interruptible(&cp->mutex)) { up(&ccp->mutex); return -ERESTARTSYS; } /* Check for removal */ if (!cp->usbdev) { - up(&cp->mutex); + mutex_unlock(&cp->mutex); up(&ccp->mutex); return -ENODEV; } @@ -1550,7 +1551,7 @@ static int auerchar_ioctl (struct inode *inode, struct file *file, unsigned int break; } /* release the mutexes */ - up(&cp->mutex); + mutex_unlock(&cp->mutex); up(&ccp->mutex); return ret; } @@ -1721,12 +1722,12 @@ write_again: up (&ccp->mutex); return -ERESTARTSYS; } - if (down_interruptible (&cp->mutex)) { + if (mutex_lock_interruptible(&cp->mutex)) { up (&ccp->mutex); return -ERESTARTSYS; } if (!cp->usbdev) { - up (&cp->mutex); + mutex_unlock(&cp->mutex); up (&ccp->mutex); return -EIO; } @@ -1750,7 +1751,7 @@ write_again: /* are there any buffers left? */ if (!bp) { - up (&cp->mutex); + mutex_unlock(&cp->mutex); up (&ccp->mutex); /* NONBLOCK: don't wait */ @@ -1783,7 +1784,7 @@ write_again: auerbuf_releasebuf (bp); /* Wake up all processes waiting for a buffer */ wake_up (&cp->bufferwait); - up (&cp->mutex); + mutex_unlock(&cp->mutex); up (&ccp->mutex); return -EFAULT; } @@ -1803,7 +1804,7 @@ write_again: auerchar_ctrlwrite_complete, bp); /* up we go */ ret = auerchain_submit_urb (&cp->controlchain, bp->urbp); - up (&cp->mutex); + mutex_unlock(&cp->mutex); if (ret) { dbg ("auerchar_write: nonzero result of auerchain_submit_urb %d", ret); auerbuf_releasebuf (bp); @@ -1830,16 +1831,16 @@ static int auerchar_release (struct inode *inode, struct file *file) down(&ccp->mutex); cp = ccp->auerdev; if (cp) { - down(&cp->mutex); + mutex_lock(&cp->mutex); /* remove an open service */ auerswald_removeservice (cp, &ccp->scontext); /* detach from device */ if ((--cp->open_count <= 0) && (cp->usbdev == NULL)) { /* usb device waits for removal */ - up (&cp->mutex); + mutex_unlock(&cp->mutex); auerswald_delete (cp); } else { - up (&cp->mutex); + mutex_unlock(&cp->mutex); } cp = NULL; ccp->auerdev = NULL; @@ -1917,7 +1918,7 @@ static int auerswald_probe (struct usb_interface *intf, } /* Initialize device descriptor */ - init_MUTEX (&cp->mutex); + mutex_init(&cp->mutex); cp->usbdev = usbdev; auerchain_init (&cp->controlchain); auerbuf_init (&cp->bufctl); @@ -2042,7 +2043,7 @@ static void auerswald_disconnect (struct usb_interface *intf) /* give back our USB minor number */ usb_deregister_dev(intf, &auerswald_class); - down (&cp->mutex); + mutex_lock(&cp->mutex); info ("device /dev/%s now disconnecting", cp->name); /* Stop the interrupt endpoint */ @@ -2057,16 +2058,18 @@ static void auerswald_disconnect (struct usb_interface *intf) if (cp->open_count == 0) { /* nobody is using this device. So we can clean up now */ - up (&cp->mutex);/* up() is possible here because no other task - can open the device (see above). I don't want - to kfree() a locked mutex. */ + mutex_unlock(&cp->mutex); + /* mutex_unlock() is possible here because no other task + can open the device (see above). I don't want + to kfree() a locked mutex. */ + auerswald_delete (cp); } else { /* device is used. Remove the pointer to the usb device (it's not valid any more). The last release() will do the clean up */ cp->usbdev = NULL; - up (&cp->mutex); + mutex_unlock(&cp->mutex); /* Terminate waiting writers */ wake_up (&cp->bufferwait); /* Inform all waiting readers */ |