| usb_alloc_urb(9) - phpMan
USB_ALLOC_URB(9) USB Core APIs USB_ALLOC_URB(9)
NAME
usb_alloc_urb - creates a new urb for a USB driver to use
SYNOPSIS
struct urb * usb_alloc_urb(int iso_packets, gfp_t mem_flags);
ARGUMENTS
iso_packets
number of iso packets for this urb
mem_flags
the type of memory to allocate, see kmalloc for a list of valid options for this.
DESCRIPTION
Creates an urb for the USB driver to use, initializes a few internal structures,
increments the usage counter, and returns a pointer to it.
If the driver want to use this urb for interrupt, control, or bulk endpoints, pass '0' as
the number of iso packets.
The driver must call usb_free_urb when it is finished with the urb.
RETURN
A pointer to the new urb, or NULL if no memory is available.
COPYRIGHT
Kernel Hackers Manual 4.8. January 2017 USB_ALLOC_URB(9)
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