diff options
| author | Guan-Yu Lin <guanyulin@google.com> | 2025-09-11 14:20:14 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-12 14:08:02 +0200 |
| commit | 7f70b89b2be66c03ddc76d3ad8aebeeec4a9c505 (patch) | |
| tree | 811c870701aa017e8f95dd037c0ca8fb3210a851 /drivers/usb/core/usb.c | |
| parent | ddb473a51b4bf33d040d827ae9a8724ee5ef1a36 (diff) | |
usb: offload: add apis for offload usage tracking
Introduce offload_usage and corresponding apis to track offload usage
on each USB device. Offload denotes that there is another co-processor
accessing the USB device via the same USB host controller. To optimize
power usage, it's essential to monitor whether the USB device is
actively used by other co-processor. This information is vital when
determining if a USB device can be safely suspended during system power
state transitions.
Signed-off-by: Guan-Yu Lin <guanyulin@google.com>
Link: https://lore.kernel.org/r/20250911142051.90822-3-guanyulin@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20250911142051.90822-3-guanyulin@google.com
Diffstat (limited to 'drivers/usb/core/usb.c')
| -rw-r--r-- | drivers/usb/core/usb.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index b88b6271cb30..b6b0b8489523 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -670,6 +670,7 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent, set_dev_node(&dev->dev, dev_to_node(bus->sysdev)); dev->state = USB_STATE_ATTACHED; dev->lpm_disable_count = 1; + dev->offload_usage = 0; atomic_set(&dev->urbnum, 0); INIT_LIST_HEAD(&dev->ep0.urb_list); |