On Sun, 4 Jul 2021 09:54:00 +0200, Martin Kepplinger wrote:

(According to Alan Stern, "as far as I know, all") SD card readers send
MEDIA_CHANGED unit attention notification on (runtime) resume. We cannot
use runtime PM with these devices as I/O always fails in that case.

This fixes runtime PM for SD cardreaders. I'd appreciate any feedback.

To enable runtime PM for an SD cardreader number 0:0:0:0, do:

[...]

Applied to 5.15/scsi-queue, thanks!

[1/3] scsi: devinfo: add new flag BLIST_MEDIA_CHANGE
      https://git.kernel.org/mkp/scsi/c/f591a2e0548d
[2/3] scsi: sd: send REQUEST SENSE for BLIST_MEDIA_CHANGE devices in runtime_resume()
      https://git.kernel.org/mkp/scsi/c/ed4246d37f3b
[3/3] scsi: devinfo: add BLIST_MEDIA_CHANGE for Ultra HS-SD/MMC usb cardreaders
      https://git.kernel.org/mkp/scsi/c/9abe677951d1

-- 
Martin K. Petersen	Oracle Linux Engineering