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| author | Alan Stern <stern@rowland.harvard.edu> | 2006-08-30 21:47:18 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-09-27 20:58:57 +0200 |
| commit | 01d883d44a1ca8dc77486635d428cba63e7fdadf (patch) | |
| tree | 447a4293b2ec4dfa1b3d03a46a3a33498809f0e8 /drivers/usb/usb-skeleton.c | |
| parent | usbcore: add autosuspend/autoresume infrastructure (diff) | |
| download | linux-01d883d44a1ca8dc77486635d428cba63e7fdadf.tar.xz linux-01d883d44a1ca8dc77486635d428cba63e7fdadf.zip | |
usbcore: non-hub-specific uses of autosuspend
This patch (as741) makes the non-hub parts of usbcore actually use the
autosuspend facilities added by an earlier patch.
Devices opened through usbfs are autoresumed and then
autosuspended upon close.
Likewise for usb-skeleton.
Devices are autoresumed for usb_set_configuration.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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; |