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

6       usb_buffer_unmap - free DMA mapping(s) for an urb
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SYNOPSIS

9       void usb_buffer_unmap(struct urb * urb);
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ARGUMENTS

12       urb
13           urb whose transfer_buffer will be unmapped
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DESCRIPTION

16       Reverses the effect of usb_buffer_map.
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COPYRIGHT

19Kernel Hackers Manual 2.6.       November 2011             USB_BUFFER_UNMAP(9)