跑业务过程中对sata盘执行hardreset失败后会触发控制器复位

【标题描述】跑业务过程中对sata盘执行hardreset失败后会触发控制器复位
【环境信息】
硬件信息：
1） 鲲鹏920
软件信息：
[root@localhost 0000:b4:02.0]# cat /etc/euleros-latest
eulerversion=EulerOS_Server_V200R008C00SPC300B630
compiletime=2019-12-27-10-58-38
kernelversion=4.19.36-vhulk1907.1.0.h619
[root@localhost 0000:b4:02.0]# uname -a
Linux localhost.localdomain 4.19.36-vhulk1907.1.0.h619.eulerosv2r8.aarch64 #1 SMP Mon Jul 22 00:00:00 UTC 2019 aarch64 aarch64 aarch64 GNU/Linux
【问题复现步骤】
1、跑业务过程中对单盘执行hardreset
【预期结果】
执行hardreset成功，不会引发控制器复位。
【实际结果】
会引发控制器复位
问题影响：  **现网场景对故障盘修复过程中，对盘执行softreset失败后，控制器复位会导致host锁住时间延长近5秒，有触发群体慢盘导致多盘置down风险。**

【修复策略】： **softreset后，不直接上升到控制器复位，而是对单个盘链路进行复位，即做轻量级修复。**

【附件信息】
[ 2038.473186] hisi_sas_v3_hw 0000:b4:02.0: phydown: phy1 phy_state=0xfd
[ 2038.580864] sd 6:0:12:0: [sdc] Synchronizing SCSI cache
[ 2038.580890] sd 6:0:12:0: [sdc] Synchronize Cache(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[ 2038.580892] sd 6:0:12:0: [sdc] Stopping disk
[ 2038.580896] sd 6:0:12:0: [sdc] Start/Stop Unit failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[ 2039.839645] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy1 link_rate=10(sata)
[ 2068.514977] sas: Enter sas_scsi_recover_host busy: 16 failed: 16
[ 2068.514984] sas: trying to find task 0x000000001814020c
[ 2068.514985] sas: sas_scsi_find_task: aborting task 0x000000001814020c
[ 2068.515206] hisi_sas_v3_hw 0000:b4:02.0: task prep: SATA/STP port2 not attach device
[ 2068.515208] hisi_sas_v3_hw 0000:b4:02.0: task exec: failed[-70]!
[ 2068.515210] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: executing internal task failed: -70
[ 2068.515211] hisi_sas_v3_hw 0000:b4:02.0: ata disk reset failed
[ 2068.515213] hisi_sas_v3_hw 0000:b4:02.0: abort task: rc=-70
[ 2068.515215] sas: sas_scsi_find_task: querying task 0x000000001814020c
[ 2068.515216] sas: sas_scsi_find_task: task 0x000000001814020c failed to abort
[ 2068.515217] sas: task 0x000000001814020c is not at LU: I_T recover
[ 2068.515218] sas: I_T nexus reset for dev 5000000000000601
[ 2068.515368] hisi_sas_v3_hw 0000:b4:02.0: task prep: SATA/STP port2 not attach device
[ 2068.515369] hisi_sas_v3_hw 0000:b4:02.0: task exec: failed[-70]!
[ 2068.515370] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: executing internal task failed: -70
[ 2068.515372] hisi_sas_v3_hw 0000:b4:02.0: ata disk reset failed
[ 2068.515527] hisi_sas_v3_hw 0000:b4:02.0: phydown: phy1 phy_state=0xfd
[ 2068.670978] sas: clear nexus ha
[ 2068.670989] hisi_sas_v3_hw 0000:b4:02.0:  **controller resetting...** 
[ 2068.676594] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy1 link_rate=10(sata)
[ 2070.600449] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy4 link_rate=10(sata)
[ 2070.600581] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy1 link_rate=10(sata)
[ 2070.602062] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy6 link_rate=10(sata)
[ 2070.602826] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy3 link_rate=10(sata)
[ 2070.605119] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy2 link_rate=10(sata)
[ 2070.605347] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy0 link_rate=10(sata)
[ 2070.605593] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy7 link_rate=10(sata)
[ 2070.607308] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy5 link_rate=10(sata)
[ 2071.649084] hisi_sas_v3_hw 0000:b4:02.0: task prep: SATA/STP port2 not attach device
[ 2071.649086] hisi_sas_v3_hw 0000:b4:02.0: task exec: failed[-70]!
[ 2071.649088] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: executing internal task failed: -70
[ 2071.649089] hisi_sas_v3_hw 0000:b4:02.0: ata disk reset failed
[ 2071.649090] hisi_sas_v3_hw 0000:b4:02.0: task prep: SATA/STP port2 not attach device
[ 2071.649091] hisi_sas_v3_hw 0000:b4:02.0: task exec: failed[-70]!
[ 2071.649093] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: executing internal task failed: -70
[ 2071.649094] hisi_sas_v3_hw 0000:b4:02.0: ata disk reset failed
[ 2071.649095] hisi_sas_v3_hw 0000:b4:02.0: task prep: SATA/STP port2 not attach device
[ 2071.649096] hisi_sas_v3_hw 0000:b4:02.0: task exec: failed[-70]!
[ 2071.649098] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: executing internal task failed: -70
[ 2071.649099] hisi_sas_v3_hw 0000:b4:02.0: ata disk reset failed
[ 2071.659353] hisi_sas_v3_hw 0000:b4:02.0: controller reset complete
[ 2071.659364] hisi_sas_v3_hw 0000:b4:02.0: phydown: phy7 phy_state=0x7f
[ 2071.659366] hisi_sas_v3_hw 0000:b4:02.0: ignore flutter phy7 down
[ 2071.820486] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy7 link_rate=10(sata)
[ 2071.820499] hisi_sas_v3_hw 0000:b4:02.0: phydown: phy6 phy_state=0xbf
[ 2071.820500] hisi_sas_v3_hw 0000:b4:02.0: ignore flutter phy6 down
[ 2071.984637] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy6 link_rate=10(sata)
[ 2071.984648] hisi_sas_v3_hw 0000:b4:02.0: phydown: phy5 phy_state=0xdf
[ 2071.984649] hisi_sas_v3_hw 0000:b4:02.0: ignore flutter phy5 down
[ 2072.148613] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy5 link_rate=10(sata)
[ 2072.148625] hisi_sas_v3_hw 0000:b4:02.0: phydown: phy4 phy_state=0xef
[ 2072.148626] hisi_sas_v3_hw 0000:b4:02.0: ignore flutter phy4 down
[ 2072.312419] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy4 link_rate=10(sata)
[ 2072.312431] hisi_sas_v3_hw 0000:b4:02.0: phydown: phy3 phy_state=0xf7
[ 2072.312433] hisi_sas_v3_hw 0000:b4:02.0: ignore flutter phy3 down
[ 2072.479942] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy3 link_rate=10(sata)
[ 2072.479954] hisi_sas_v3_hw 0000:b4:02.0: phydown: phy0 phy_state=0xfe
[ 2072.479955] hisi_sas_v3_hw 0000:b4:02.0: ignore flutter phy0 down
[ 2072.640491] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy0 link_rate=10(sata)
[ 2072.640503] hisi_sas_v3_hw 0000:b4:02.0: phydown: phy1 phy_state=0xfd
[ 2072.640504] hisi_sas_v3_hw 0000:b4:02.0: ignore flutter phy1 down
[ 2072.804685] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy1 link_rate=10(sata)
[ 2072.804697] hisi_sas_v3_hw 0000:b4:02.0: phydown: phy2 phy_state=0xfb
[ 2072.804698] hisi_sas_v3_hw 0000:b4:02.0: ignore flutter phy2 down
[ 2072.970915] hisi_sas_v3_hw 0000:b4:02.0: phyup: phy2 link_rate=10(sata)
[ 2072.970931] sas: clear nexus ha succeeded
[ 2072.970934] sas: --- Exit sas_eh_handle_sas_errors -- clear_q

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