Joe Perches <j...@perches.com> writes: > And does this really need to be alloc'd?
Yes, it does. It is used as a transfer_buffer in usb_fill_bulk_urb() and must be "suitable for DMA". From include/linux/usb.h: /** * struct urb - USB Request Block .. * @transfer_buffer: This identifies the buffer to (or from) which the I/O * request will be performed unless URB_NO_TRANSFER_DMA_MAP is set * (however, do not leave garbage in transfer_buffer even then). * This buffer must be suitable for DMA; allocate it with * kmalloc() or equivalent. For transfers to "in" endpoints, contents * of this buffer will be modified. This buffer is used for the data * stage of control transfers. Bjørn -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
