From 21c7e972475e6a975fbe97f8974c96fe4713077c Mon Sep 17 00:00:00 2001 From: Luo Jiaxing Date: Tue, 12 Oct 2021 20:26:28 +0800 Subject: [PATCH] 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 Signed-off-by: John Garry Signed-off-by: Martin K. Petersen --- drivers/scsi/hisi_sas/hisi_sas_main.c | 29 ++++++++++++++++++++++----- 1 file changed, 24 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c index 5b091388c095..f206c433de32 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -1870,14 +1870,33 @@ 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_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); - if (rc == TMF_RESP_FUNC_FAILED) - return TMF_RESP_FUNC_FAILED; + 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; + } } - rc = hisi_sas_debug_I_T_nexus_reset(device); - if ((rc == TMF_RESP_FUNC_COMPLETE) || (rc == -ENODEV)) hisi_sas_release_task(hisi_hba, device); -- 2.20.1