other versions
- stretch 4.9.168-1
USB_RESET_DEVICE(9) | USB Core APIs | USB_RESET_DEVICE(9) |
NAME¶
usb_reset_device - warn interface drivers and perform a USB port resetSYNOPSIS¶
int usb_reset_device(struct usb_device * udev);
ARGUMENTS¶
udevdevice to reset (not in SUSPENDED or NOTATTACHED
state)
DESCRIPTION¶
Warns all drivers bound to registered interfaces (using their pre_reset method), performs the port reset, and then lets the drivers know that the reset is over (using their post_reset method).RETURN¶
The same as for usb_reset_and_verify_device.NOTE¶
The caller must own the device lock. For example, it's safe to use this from a driver probe routine after downloading new firmware. For calls that might not occur during probe, drivers should lock the device using usb_lock_device_for_reset.If an interface is currently being probed or disconnected, we assume its driver knows how to handle resets. For all other interfaces, if the driver doesn't have pre_reset and post_reset methods then we attempt to unbind it and rebind afterward.
COPYRIGHT¶
April 2019 | Kernel Hackers Manual 4.9. |