diff options
Diffstat (limited to 'drivers/usb/usb-skeleton.c')
| -rw-r--r-- | drivers/usb/usb-skeleton.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c index 9b542a6ba978..1b51d3187a95 100644 --- a/drivers/usb/usb-skeleton.c +++ b/drivers/usb/usb-skeleton.c @@ -90,6 +90,11 @@ static int skel_open(struct inode *inode, struct file *file) goto exit; } + /* prevent the device from being autosuspended */ + retval = usb_autopm_get_interface(interface); + if (retval) + goto exit; + /* increment our usage count for the device */ kref_get(&dev->kref); @@ -108,6 +113,12 @@ static int skel_release(struct inode *inode, struct file *file) if (dev == NULL) return -ENODEV; + /* allow the device to be autosuspended */ + mutex_lock(&dev->io_mutex); + if (dev->interface) + usb_autopm_put_interface(dev->interface); + mutex_unlock(&dev->io_mutex); + /* decrement the count on our device */ kref_put(&dev->kref, skel_delete); return 0; |