usb_lock_device_for_reset man page on Scientific

usb_lock_device_for_reset man page on Scientific

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USB_LOCK_DEVICE_FOR_(9)		 USB Core APIs	       USB_LOCK_DEVICE_FOR_(9)

NAME
       usb_lock_device_for_reset - cautiously acquire the lock for a usb
       device structure

SYNOPSIS
       int usb_lock_device_for_reset(struct usb_device * udev,
				     const struct usb_interface * iface);

ARGUMENTS
       udev
	   device that´s being locked

       iface
	   interface bound to the driver making the request (optional)

DESCRIPTION
       Attempts to acquire the device lock, but fails if the device is
       NOTATTACHED or SUSPENDED, or if iface is specified and the interface is
       neither BINDING nor BOUND. Rather than sleeping to wait for the lock,
       the routine polls repeatedly. This is to prevent deadlock with
       disconnect; in some drivers (such as usb-storage) the disconnect or
       suspend method will block waiting for a device reset to complete.

       Returns a negative error code for failure, otherwise 0.

COPYRIGHT
Kernel Hackers Manual 2.6.	 November 2013	       USB_LOCK_DEVICE_FOR_(9)

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