Bart,

Surround scsi_execute() calls with scsi_autopm_get_device() and
scsi_autopm_put_device(). Note: removing sr_mutex protection from
the scsi_cd_get() and scsi_cd_put() calls is safe because the
purpose of sr_mutex is to serialize cdrom_*() calls.

This patch avoids that complaints similar to the following appear in
the kernel log if runtime power management is enabled:

Applied to 4.18/scsi-fixes, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering