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path: root/drivers/usb/misc/rio500.c
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Diffstat (limited to 'drivers/usb/misc/rio500.c')
-rw-r--r--drivers/usb/misc/rio500.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/usb/misc/rio500.c b/drivers/usb/misc/rio500.c
index 32d0199d0c32..a85771b1563d 100644
--- a/drivers/usb/misc/rio500.c
+++ b/drivers/usb/misc/rio500.c
@@ -78,10 +78,13 @@ 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;
@@ -91,6 +94,7 @@ static int open_rio(struct inode *inode, struct file *file)
mutex_unlock(&(rio->lock));
dev_info(&rio->rio_dev->dev, "Rio opened.\n");
+ unlock_kernel();
return 0;
}
@@ -115,7 +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) {
@@ -254,7 +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;
}
@@ -489,6 +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);
@@ -498,6 +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);
@@ -508,9 +512,10 @@ static void disconnect_rio(struct usb_interface *intf)
rio->present = 0;
mutex_unlock(&(rio->lock));
}
+ unlock_kernel();
}
-static struct usb_device_id rio_table [] = {
+static const struct usb_device_id rio_table[] = {
{ USB_DEVICE(0x0841, 1) }, /* Rio 500 */
{ } /* Terminating entry */
};