On Thu, Sep 11, 2014 at 05:41:18PM -0700, Subhash Jadavani wrote: > > UFS device has supports 4 different well known logical units: "REPORT_LUNS" > (address: 01h), "UFS Device" (address: 50h), "RPMB" (address: 44h) and > "BOOT" (address: 30h). > > UFS device's power management needs to be controlled by "POWER CONDITION" > field of SSU (START STOP UNIT) command. But this "power condition" field > will take effect only when its sent to "UFS device" well known logical unit > (address: 50h) hence we require the scsi_device instance to represent this > logical unit in order for the UFS host driver to send the SSU command for > power management. > > We also require the scsi_device instance for "RPMB" (Replay Protected Memory > Block) LU so user space process can control this LU. If those are the only LUs you specificly need I'd suggest you just manually call scsi_add_device from your driver for those instead of listing them in REPORT_LUNS and making them part of the normal LUN scan. One advantage of the well known LUNs is that you always know where in the LUN namespace they are :) -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
