1USB_ALLOC_URB(9)                 USB Core APIs                USB_ALLOC_URB(9)
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NAME

6       usb_alloc_urb - creates a new urb for a USB driver to use
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SYNOPSIS

9       struct urb * usb_alloc_urb(int iso_packets, gfp_t mem_flags);
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ARGUMENTS

12       iso_packets
13           number of iso packets for this urb
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15       mem_flags
16           the type of memory to allocate, see kmalloc for a list of valid
17           options for this.
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DESCRIPTION

20       Creates an urb for the USB driver to use, initializes a few internal
21       structures, increments the usage counter, and returns a pointer to it.
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23       If the driver want to use this urb for interrupt, control, or bulk
24       endpoints, pass '0' as the number of iso packets.
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26       The driver must call usb_free_urb when it is finished with the urb.
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RETURN

29       A pointer to the new urb, or NULL if no memory is available.
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32Kernel Hackers Manual 3.10         June 2019                  USB_ALLOC_URB(9)
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