Re: [PATCH v2 2/2] scsi: sd: Rework asynchronous resume support

[Bart Van Assche <bvanassche@acm.org>]

On 8/15/22 11:26, Geert Uytterhoeven wrote:
> On Mon, Aug 15, 2022 at 3:49 PM Bart Van Assche <bvanassche@acm.org> wrote:
>> Would it be possible to share the output of the command below? That
>> should reveal which ATA driver is active on the test setup.
>>
>> find /sys -name proc_name | xargs grep -aH .
> 
> /sys/devices/platform/soc/ee300000.sata/ata1/host0/scsi_host/host0/proc_name:sata_rcar

Thanks Geert for the help. Although I already posted a revert, I'm still 
trying to root-cause this issue. Do you perhaps know whether sata_rcar 
controllers support NCQ and if so, what queue depth these controllers 
support? I think that information is available in sysfs. Here is an 
example for a VM:

# (cd /sys/class/scsi_device && for a in */device/*/*/ncq_prio_enable; 
do p=${a%/ncq_prio_enable}; grep -qi ata $p/inquiry || continue; grep 
-aH . $p/{queue_depth,ncq*}; done)
2:0:0:0/device/driver/2:0:0:0/queue_depth:32
2:0:0:0/device/driver/2:0:0:0/ncq_prio_enable:0
2:0:0:0/device/driver/2:0:0:0/ncq_prio_supported:0
2:0:0:0/device/generic/device/queue_depth:32
2:0:0:0/device/generic/device/ncq_prio_enable:0
2:0:0:0/device/generic/device/ncq_prio_supported:0
6:0:0:1/device/driver/2:0:0:0/queue_depth:32
6:0:0:1/device/driver/2:0:0:0/ncq_prio_enable:0
6:0:0:1/device/driver/2:0:0:0/ncq_prio_supported:0

Thanks,

Bart.