[PATCH v6] ufs: core: wlun suspend SSU/enter hibern8 fail recovery

[Daniil Lunev]

> Applied to 6.2/scsi-staging, thanks!

There is an interesting side effect of the patch in this iteration
(which I am not sure was present in the past iteration I tried):
If the device auto suspends while running purge - controller is
seemingly recent and thus the purge is aborted (with no patch at all
it hangs).
That might be ok behaviour though - it will just make it an explicit
requirement to disable runtime suspend during the management
operation.

localhost ~ # ufs-utils fl -t 6 -e -p /dev/bsg/ufs-bsg0
localhost ~ # ufs-utils attr -a -p /dev/bsg/ufs-bsg0 | grep bPurgeStatus
bPurgeStatus               := 0x00

[   25.801980] ufs_device_wlun 0:0:0:49488: START_STOP failed for
power mode: 2, result 2
[   25.802002] ufs_device_wlun 0:0:0:49488: Sense Key : Not Ready [current]
[   25.802009] ufs_device_wlun 0:0:0:49488: Add. Sense: No additional
sense information
[   25.802020] ufs_device_wlun 0:0:0:49488: ufshcd_wl_runtime_suspend
failed: -16