Re: [PATCH RFC V2 3/3] scsi_mq: enable runtime PM

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On Tue, 2018-07-17 at 23:30 +-0800, Ming Lei wrote:
+AD4- On Tue, Jul 17, 2018 at 03:24:11PM +-0200, Christoph Hellwig wrote:
+AD4- +AD4- On Fri, Jul 13, 2018 at 04:06:02PM +-0800, Ming Lei wrote:
+AD4- +AD4- +AD4- Usually SCSI supports runtime PM, so pass BLK+AF8-MQ+AF8-F+AF8-SUPPORT+AF8-RPM to blk-mq
+AD4- +AD4- +AD4- core for enabling block runtime PM.
+AD4- +AD4- 
+AD4- +AD4- I still think enabling this unconditionally for any SCSI device was
+AD4- +AD4- a mistake, and it is even more so for blk-mq.
+AD4- +AD4- 
+AD4- +AD4- Please only opt in for ufs, ATA first, adding others if wanted by
+AD4- +AD4- maintainers.
+AD4- 
+AD4- No, this way will cause regression because runtime PM works for
+AD4- all sd/sr device actually, and it isn't related with scsi host.

For which SCSI devices other than ufs and ATA do we need PM support?

Bart.







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