Re: [PATCH] scsi: pm8001: Fix phys_to_virt() usage on dma_addr_t

[John Garry]

On 09/12/2021 12:04, Ajish.Koshy@xxxxxxxxxxxxx wrote:
> Was testing the patch on arm server. Didn't see crash there but observing timeouts and error
> handling getting triggered for drives. But the same code works fine on x86.
>
> At your end do you still face similar situation on arm server ?

Yeah, I see that as well even without enabling the IOMMU.

root@(none)$ [  163.974907] sas: Enter sas_scsi_recover_host busy: 222 
failed: 222
[  163.981108] sas: sas_scsi_find_task: aborting task 0x000000005c703676
root@(none)$
root@(none)$ [  185.963714] pm80xx0:: pm8001_exec_internal_tmf_task 
757:TMF task[1]timeout.

I figured that it was a card FW issue as I have been using what I got 
out the box, and I have no tool to update the firmware on an arm host.

It seems that SSP and STP commands are not completing for some reason, 
from the "busy: 222" line.