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scsi: hisi_sas: Disable SATA disk phy for severe I_T nexus reset failure 

If the softreset fails in the I_T reset, libsas will then continue to issue
a controller reset to try to recover.

However a faulty disk may cause the softreset to fail, and resetting the
controller will not help this scenario. Indeed, we will just continue the
cycle of error handle handling to try to recover.

So if the softreset fails upon certain conditions, just disable the phy
associated with the disk. The user needs to handle this problem.

Link: https://lore.kernel.org/r/1634041588-74824-5-git-send-email-john.garry@huawei.com
Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Luo Jiaxing 2021-10-12 20:26:28 +08:00 committed by Martin K. Petersen
parent 00aeaf329a
commit 21c7e97247
1 changed files with 25 additions and 6 deletions
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31
drivers/scsi/hisi_sas/hisi_sas_main.c
View File

@ -1870,13 +1870,32 @@ static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
}
hisi_sas_dereg_device(hisi_hba, device);
if (dev_is_sata(device)) {
rc = hisi_sas_softreset_ata_disk(device);
if (rc == TMF_RESP_FUNC_FAILED)
return TMF_RESP_FUNC_FAILED;
}
rc = hisi_sas_debug_I_T_nexus_reset(device);
if (rc == TMF_RESP_FUNC_COMPLETE && dev_is_sata(device)) {
struct sas_phy *local_phy;
rc = hisi_sas_softreset_ata_disk(device);
switch (rc) {
case -ECOMM:
rc = -ENODEV;
break;
case TMF_RESP_FUNC_FAILED:
case -EMSGSIZE:
case -EIO:
local_phy = sas_get_local_phy(device);
rc = sas_phy_enable(local_phy, 0);
if (!rc) {
local_phy->enabled = 0;
dev_err(dev, "Disabled local phy of ATA disk %016llx due to softreset fail (%d)\n",
SAS_ADDR(device->sas_addr), rc);
rc = -ENODEV;
}
sas_put_local_phy(local_phy);
break;
default:
break;
}
}
if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV))
hisi_sas_release_task(hisi_hba, device);