On Wed, 2018-10-17 at 13:27 -0700, Bart Van Assche wrote: +AD4 Although the power management code never calls the system-wide and runtime +AD4 suspend callbacks concurrently, runtime power state changes can happen +AD4 while the system is being suspended or resumed. See also the dpm+AF8-suspend() +AD4 and dpm+AF8-resume() calls in hibernation+AF8-snapshot(). Make sure the sd driver +AD4 supports this. This patch avoids that the following call trace is reported +AD4 during system-wide suspend +AFs ... +AF0 This patch does not apply cleanly on Martin's 4.20/scsi-queue tree. I will rebase this patch, retest and repost it. Bart.