diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/misc/rio500.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/usb/misc/rio500.c b/drivers/usb/misc/rio500.c index 47ce46bb5b0..a85771b1563 100644 --- a/drivers/usb/misc/rio500.c +++ b/drivers/usb/misc/rio500.c @@ -77,11 +77,14 @@ static struct rio_usb_data rio_instance; static int open_rio(struct inode *inode, struct file *file) { struct rio_usb_data *rio = &rio_instance; + + /* against disconnect() */ lock_kernel(); mutex_lock(&(rio->lock)); if (rio->isopen || !rio->present) { mutex_unlock(&(rio->lock)); + unlock_kernel(); return -EBUSY; } rio->isopen = 1; @@ -116,7 +119,6 @@ static long ioctl_rio(struct file *file, unsigned int cmd, unsigned long arg) int retries; int retval=0; - lock_kernel(); mutex_lock(&(rio->lock)); /* Sanity check to make sure rio is connected, powered, etc */ if (rio->present == 0 || rio->rio_dev == NULL) { @@ -255,7 +257,6 @@ static long ioctl_rio(struct file *file, unsigned int cmd, unsigned long arg) err_out: mutex_unlock(&(rio->lock)); - unlock_kernel(); return retval; } @@ -490,6 +491,7 @@ static void disconnect_rio(struct usb_interface *intf) struct rio_usb_data *rio = usb_get_intfdata (intf); usb_set_intfdata (intf, NULL); + lock_kernel(); if (rio) { usb_deregister_dev(intf, &usb_rio_class); @@ -499,6 +501,7 @@ static void disconnect_rio(struct usb_interface *intf) /* better let it finish - the release will do whats needed */ rio->rio_dev = NULL; mutex_unlock(&(rio->lock)); + unlock_kernel(); return; } kfree(rio->ibuf); @@ -509,6 +512,7 @@ static void disconnect_rio(struct usb_interface *intf) rio->present = 0; mutex_unlock(&(rio->lock)); } + unlock_kernel(); } static const struct usb_device_id rio_table[] = { |