Hi, I am attempting to get a wireless USB mass storage device to work with an HWA as the host controller. Everything works fine as long as the SCSI reads are smaller than 4kbytes. When the usb-storage driver receives the first 16kB read, it breaks it up into 4-4kB URBs and sends it to the HWA host controller. This causes problems because the max packet size of the bulk in endpoint on the wireless device is 3854 bytes. It responds to the host poll request with 7kB of data (2x3.5kB packets) which causes a babble since the host was only expecting 4kB. Is there a way to get the usb-storage driver to send the entire buffer down to the HCD in a single URB instead of breaking it up? I assume it has something to do with the SG or DMA settings when the HCD is created but I'm not sure what the correct settings are. Another option would be for usb-storage to take into account the max packet size when segmenting the requests and make sure all but the last segment are multiples of the max packet size. Thanks, Tom -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
