tree e3536f4732f8675b024029244817159f9083e8a9
parent dd49ded8aa432e2877e8b8bafcc00898c20ca381
author Vishakha Channapattan <vishakhavc@google.com> 1618482828 +0530
committer Martin K. Petersen <martin.petersen@oracle.com> 1618540139 -0400

scsi: pm80xx: Add sysfs attribute to track iop0 count

A new sysfs variable 'ctl_iop0_count' is being introduced that tells if
the controller is alive by indicating controller ticks. If on subsequent
run we see the ticks changing that indicates that controller is not
dead.

Using the 'ctl_iop0_count' sysfs variable we can see ticks incrementing:

    linux-9saw:~# cat /sys/class/scsi_host/host*/ctl_iop0_count
    0x000000a3
    0x000001db
    0x000001e4
    0x000001e7

Link: https://lore.kernel.org/r/20210415103352.3580-5-Viswas.G@microchip.com
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Vishakha Channapattan <vishakhavc@google.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Ashokkumar N <Ashokkumar.N@microchip.com>
Signed-off-by: Radha Ramachandran <radha@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>