On Tue, Jul 17, 2018 at 03:24:11PM +0200, Christoph Hellwig wrote: > On Fri, Jul 13, 2018 at 04:06:02PM +0800, Ming Lei wrote: > > Usually SCSI supports runtime PM, so pass BLK_MQ_F_SUPPORT_RPM to blk-mq > > core for enabling block runtime PM. > > I still think enabling this unconditionally for any SCSI device was > a mistake, and it is even more so for blk-mq. > > Please only opt in for ufs, ATA first, adding others if wanted by > maintainers. No, this way will cause regression because runtime PM works for all sd/sr device actually, and it isn't related with scsi host. Thanks, Ming