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path: root/drivers/usb/misc/sisusbvga/sisusb.c
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Diffstat (limited to 'drivers/usb/misc/sisusbvga/sisusb.c')
-rw-r--r--drivers/usb/misc/sisusbvga/sisusb.c38
1 files changed, 5 insertions, 33 deletions
diff --git a/drivers/usb/misc/sisusbvga/sisusb.c b/drivers/usb/misc/sisusbvga/sisusb.c
index 6f8b134a79c..9f37ba44c13 100644
--- a/drivers/usb/misc/sisusbvga/sisusb.c
+++ b/drivers/usb/misc/sisusbvga/sisusb.c
@@ -72,8 +72,6 @@ MODULE_PARM_DESC(last, "Number of last console to take over (1 - MAX_NR_CONSOLES
static struct usb_driver sisusb_driver;
-DEFINE_MUTEX(disconnect_mutex);
-
static void
sisusb_free_buffers(struct sisusb_usb_data *sisusb)
{
@@ -2511,31 +2509,24 @@ sisusb_open(struct inode *inode, struct file *file)
struct usb_interface *interface;
int subminor = iminor(inode);
- mutex_lock(&disconnect_mutex);
-
if (!(interface = usb_find_interface(&sisusb_driver, subminor))) {
printk(KERN_ERR "sisusb[%d]: Failed to find interface\n",
subminor);
- mutex_unlock(&disconnect_mutex);
return -ENODEV;
}
- if (!(sisusb = usb_get_intfdata(interface))) {
- mutex_unlock(&disconnect_mutex);
+ if (!(sisusb = usb_get_intfdata(interface)))
return -ENODEV;
- }
mutex_lock(&sisusb->lock);
if (!sisusb->present || !sisusb->ready) {
mutex_unlock(&sisusb->lock);
- mutex_unlock(&disconnect_mutex);
return -ENODEV;
}
if (sisusb->isopen) {
mutex_unlock(&sisusb->lock);
- mutex_unlock(&disconnect_mutex);
return -EBUSY;
}
@@ -2543,7 +2534,6 @@ sisusb_open(struct inode *inode, struct file *file)
if (sisusb->sisusb_dev->speed == USB_SPEED_HIGH) {
if (sisusb_init_gfxdevice(sisusb, 0)) {
mutex_unlock(&sisusb->lock);
- mutex_unlock(&disconnect_mutex);
printk(KERN_ERR
"sisusbvga[%d]: Failed to initialize "
"device\n",
@@ -2552,7 +2542,6 @@ sisusb_open(struct inode *inode, struct file *file)
}
} else {
mutex_unlock(&sisusb->lock);
- mutex_unlock(&disconnect_mutex);
printk(KERN_ERR
"sisusbvga[%d]: Device not attached to "
"USB 2.0 hub\n",
@@ -2570,8 +2559,6 @@ sisusb_open(struct inode *inode, struct file *file)
mutex_unlock(&sisusb->lock);
- mutex_unlock(&disconnect_mutex);
-
return 0;
}
@@ -2601,12 +2588,8 @@ sisusb_release(struct inode *inode, struct file *file)
struct sisusb_usb_data *sisusb;
int myminor;
- mutex_lock(&disconnect_mutex);
-
- if (!(sisusb = (struct sisusb_usb_data *)file->private_data)) {
- mutex_unlock(&disconnect_mutex);
+ if (!(sisusb = (struct sisusb_usb_data *)file->private_data))
return -ENODEV;
- }
mutex_lock(&sisusb->lock);
@@ -2626,8 +2609,6 @@ sisusb_release(struct inode *inode, struct file *file)
/* decrement the usage count on our device */
kref_put(&sisusb->kref, sisusb_delete);
- mutex_unlock(&disconnect_mutex);
-
return 0;
}
@@ -3383,12 +3364,9 @@ static void sisusb_disconnect(struct usb_interface *intf)
sisusb_console_exit(sisusb);
#endif
- /* The above code doesn't need the disconnect
- * semaphore to be down; its meaning is to
- * protect all other routines from the disconnect
- * case, not the other way round.
- */
- mutex_lock(&disconnect_mutex);
+ minor = sisusb->minor;
+
+ usb_deregister_dev(intf, &usb_sisusb_class);
mutex_lock(&sisusb->lock);
@@ -3396,12 +3374,8 @@ static void sisusb_disconnect(struct usb_interface *intf)
if (!sisusb_wait_all_out_complete(sisusb))
sisusb_kill_all_busy(sisusb);
- minor = sisusb->minor;
-
usb_set_intfdata(intf, NULL);
- usb_deregister_dev(intf, &usb_sisusb_class);
-
#ifdef SISUSB_OLD_CONFIG_COMPAT
if (sisusb->ioctl32registered) {
int ret;
@@ -3426,8 +3400,6 @@ static void sisusb_disconnect(struct usb_interface *intf)
/* decrement our usage count */
kref_put(&sisusb->kref, sisusb_delete);
- mutex_unlock(&disconnect_mutex);
-
printk(KERN_INFO "sisusbvga[%d]: Disconnected\n", minor);
}