On Fri, 9 Apr 2010, Sarah Sharp wrote: > > However there's nothing wrong with capping things at some reasonable > > size. If someone tries to submit a request that violates the driver's > > specified limit, it's their own fault. Was Ramya's very large transfer > > a single bulk URB? Did it use scatter-gather? > > Yes, Ramya's transfer was one URB with a scatter-gather list of ~120 > entries. He was working on a UASP driver that sets the max_sectors > field in scsi_host_template to 960 or 1024, which makes some of the > sglists very large. Then his driver is buggy. It should limit the length of scatter-gather lists allowed by the host according to what the HCD can support, the way usb-storage does: host->sg_tablesize = usb_stor_sg_tablesize(intf); Alan Stern -- 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
