In ata_eh_reset, it will reset three times at most for sata disk. For
some drivers through libsas, it calls sas_ata_hard_reset at last. When
device is gone, function sas_ata_hard_reset will return -ENODEV. But
it will still try to reset three times for offline device. This process
lasts a long time:
[11248.344323] ata13.00: status: { ERR }
[11248.344324] ata13.00: error: { ABRT }
[11248.344327] ata13: hard resetting link
[11248.503557] sas: ata: ex 500e004aaaaaaa1f phy02:U:A attached:0000000000000000 (no device)
[11249.359524] sas: ata13: end_device-1:0:2: reset failed (errno=-19)[eta03d:19h:35m:17s]
[11249.365692] ata13: reset failed (errno=-19), retrying in 9 secs
[11258.451402] ata13: hard resetting linkKB/0KB/0KB /s] [0/0/0 iops][eta 03d:22h:10m:48s]
[11259.411508] sas: ata13: end_device-1:0:2: reset failed (errno=-19)[eta 03d:22h:28m:05s]
[11259.417683] ata13: reset failed (errno=-19), retrying in 10 secs
[11268.695401] ata13: hard resetting linkKB/0KB/0KB /s] [0/0/0 iops] [eta 04d:01h:03m:37s]
[11269.699513] sas: ata13: end_device-1:0:2: reset failed (errno=-19)[eta 04d:01h:20m:54s]
[11269.705689] ata13: reset failed (errno=-19), retrying in 34 secs
[11304.275393] ata13: hard resetting linkKB/0KB/0KB /s] [0/0/0 iops] [eta 04d:11h:25m:43s]
[11305.283516] sas: ata13: end_device-1:0:2: reset failed (errno=-19)[eta 04d:11h:43m:00s]
[11305.289692] ata13: reset failed, giving up
[11305.293785] ata13.00: disabled
Actually it is no need to reset three times for this scenario. So add
a check to avoid it.
Signed-off-by: Xiang Chen <chenxiang66@xxxxxxxxxxxxx>
---
drivers/ata/libata-eh.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 11c3137..23a8946 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -3032,6 +3032,15 @@ int ata_eh_reset(struct ata_link *link, int classify,
goto out;
}
+ if (rc == -ENODEV && ap->flags & ATA_FLAG_SAS_HOST) {
+ ata_link_warn(failed_link,
+ "reset failed (errno=%d, device is offline for SAS host\n)",
+ rc);
+ if (ata_is_host_link(link))
+ ata_eh_thaw_port(ap);
+ goto out;
+ }
+
now = jiffies;
if (time_before(now, deadline)) {
unsigned long delta = deadline - now;
--
1.9.1
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