linux-kernel - Re: [PATCH] Revert "scsi: libsas: Fix exp-attached device scan after probe failure scanned in again after probe failed"

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Message-ID: <8911e1d8-98d3-9c1d-1329-c9dd78cda45e@huawei.com>
Date: Thu, 27 Nov 2025 15:27:18 +0800
From: yangxingui <yangxingui@...wei.com>
To: John Garry <john.g.garry@...cle.com>, <yanaijie@...wei.com>,
	<jejb@...ux.ibm.com>, <martin.petersen@...cle.com>
CC: <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linuxarm@...wei.com>, <liyihang9@...artners.com>, <liuyonglong@...wei.com>,
	<kangfenglong@...wei.com>
Subject: Re: [PATCH] Revert "scsi: libsas: Fix exp-attached device scan after
 probe failure scanned in again after probe failed"

Hi, John

I'm glad to receive your reply.

On 2025/11/27 14:47, John Garry wrote:
> On 27/11/2025 00:59, yangxingui wrote:
>> Kindly ping for upstream.
>>
>> On 2025/10/21 15:34, Xingui Yang wrote:
> 
> Your reasons for revert is light on details.
> 
>>> This reverts commit ab2068a6fb84751836a84c26ca72b3beb349619d.
>>>
>>> As the disk may fall into an abnormal loop of probe when it fails to 
>>> probe
>>> due to physical reasons and cannot be repaired.
> 
> So for a faulty disk we get into a indefinite loop, right?
Yes, because a hard reset for SATA disk is executed during the error 
handler, a BC event will be received after the disk probe fails, and the 
probe will be re-executed on the disk.
> 
> What about case where this was helping before?
A temporary fault injected into the disk or link, which can be recovered 
after a short time.

log before:
[49495.065650] sas: broadcast received: 0
[49495.065661] sas: REVALIDATING DOMAIN on port 0, pid:318259
[49495.066190] sas: Expander phy change count has changed
[49495.068368] sas: ex 500e004aaaaaaa1f phy2 originated BROADCAST(CHANGE)
[49495.068369] sas: ex 500e004aaaaaaa1f phy2 new device attached
[49495.068434] sas: ex 500e004aaaaaaa1f phy02:U:9 attached: 
500e004aaaaaaa02 (stp)
[49495.090453] hisi_sas_v3_hw 0000:b4:02.0: dev[698:5] found
[49495.266248] sas: done REVALIDATING DOMAIN on port 0, pid:318259, res 0x0
[49495.271115] sas: Enter sas_scsi_recover_host busy: 0 failed: 0
[49495.271129] sas: ata761: end_device-6:3:0: dev error handler
[49495.271133] sas: ata762: end_device-6:3:1: dev error handler
[49495.271136] sas: ata764: end_device-6:3:3: dev error handler
[49495.271170] sas: ata765: end_device-6:3:4: dev error handler
[49495.271171] sas: ata768: end_device-6:3:5: dev error handler
[49495.271173] sas: ata769: end_device-6:3:2: dev error handler
[49497.465030] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4081 task=0000000054417d4d dev id=698 sas_addr=0x500e004aaaaaaa02 
CQ hdr: 0x101b 0x2ba0ff1 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[49497.503517] sas: sas_to_ata_err: Saw error 135. What to do?
[49497.503518] sas: sas_ata_task_done: SAS error 87
[49497.503546] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4082 task=00000000972479c8 dev id=698 sas_addr=0x500e004aaaaaaa02 
CQ hdr: 0x203 0x2ba0ff2 0x0 0x100 Error info: 0x0 0x0 0x0 0x0
[49497.542451] ata769.00: failed to IDENTIFY (I/O error, err_mask=0x4)
[49502.713074] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4005 task=00000000be2e16ae dev id=698 sas_addr=0x500e004aaaaaaa02 
CQ hdr: 0x101b 0x2ba0fa5 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[49502.752805] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[49502.767384] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4006 task=00000000be2e16ae dev id=698 sas_addr=0x500e004aaaaaaa02 
CQ hdr: 0x101b 0x2ba0fa6 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[49502.807336] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[49502.821449] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4007 task=00000000be2e16ae dev id=698 sas_addr=0x500e004aaaaaaa02 
CQ hdr: 0x101b 0x2ba0fa7 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[49502.861361] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[49502.875664] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: executing 
internal task failed!
[49502.898556] hisi_sas_v3_hw 0000:b4:02.0: ata disk reset failed
[49502.912015] hisi_sas_v3_hw 0000:b4:02.0: I_T nexus reset: softreset 
failed (-5)
[49505.112967] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4010 task=00000000be2e16ae dev id=698 sas_addr=0x500e004aaaaaaa02 
CQ hdr: 0x203 0x2ba0faa 0x0 0x100 Error info: 0x0 0x0 0x0 0x0
[49505.153594] ata769.00: failed to IDENTIFY (I/O error, err_mask=0x4)
[49510.137044] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4027 task=00000000d6273fa9 dev id=698 sas_addr=0x500e004aaaaaaa02 
CQ hdr: 0x101b 0x2ba0fbb 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[49510.178227] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[49510.193284] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4028 task=00000000d6273fa9 dev id=698 sas_addr=0x500e004aaaaaaa02 
CQ hdr: 0x101b 0x2ba0fbc 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[49510.234190] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[49510.248603] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4029 task=00000000d6273fa9 dev id=698 sas_addr=0x500e004aaaaaaa02 
CQ hdr: 0x101b 0x2ba0fbd 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[49510.288968] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[49510.303156] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: executing 
internal task failed!
[49510.325863] hisi_sas_v3_hw 0000:b4:02.0: ata disk reset failed
[49510.339230] hisi_sas_v3_hw 0000:b4:02.0: I_T nexus reset: softreset 
failed (-5)
[49512.536979] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4032 task=00000000d6273fa9 dev id=698 sas_addr=0x500e004aaaaaaa02 
CQ hdr: 0x203 0x2ba0fc0 0x0 0x100 Error info: 0x0 0x0 0x0 0x0
[49512.577050] ata769.00: failed to IDENTIFY (I/O error, err_mask=0x4)
[49517.561046] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4050 task=0000000070019bd9 dev id=698 sas_addr=0x500e004aaaaaaa02 
CQ hdr: 0x101b 0x2ba0fd2 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[49517.601923] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[49517.616945] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4051 task=0000000070019bd9 dev id=698 sas_addr=0x500e004aaaaaaa02 
CQ hdr: 0x101b 0x2ba0fd3 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[49517.657745] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[49517.672097] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4052 task=0000000070019bd9 dev id=698 sas_addr=0x500e004aaaaaaa02 
CQ hdr: 0x101b 0x2ba0fd4 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[49517.712567] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[49517.726756] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: executing 
internal task failed!
[49517.749459] hisi_sas_v3_hw 0000:b4:02.0: ata disk reset failed
[49517.762828] hisi_sas_v3_hw 0000:b4:02.0: I_T nexus reset: softreset 
failed (-5)
[49519.960965] sas: --- Exit sas_scsi_recover_host: busy: 0 failed: 0 
tries: 1
[49519.971018] sas: sas_probe_sata: for exp-attached device 
500e004aaaaaaa02 returned -19
[49519.971039] hisi_sas_v3_hw 0000:b4:02.0: dev[698:5] is gone
[49519.984864] sas: broadcast received: 0
[49519.984876] sas: REVALIDATING DOMAIN on port 0, pid:318259
[49519.985362] sas: Expander phy change count has changed
[49519.987278] sas: ex 500e004aaaaaaa1f phy2 originated BROADCAST(CHANGE)
[49519.987442] sas: ex 500e004aaaaaaa1f phy02:U:A attached: 
500e004aaaaaaa02 (stp)
[49519.987443] sas: ex 500e004aaaaaaa1f phy 0x2 broadcast flutter
[49519.987448] sas: done REVALIDATING DOMAIN on port 0, pid:318259, res 0x0

log new after apply the patch:

[70734.380100] sas: broadcast received: 0
[70734.380110] sas: REVALIDATING DOMAIN on port 0, pid:311546
[70734.380431] sas: Expander phy change count has changed
[70734.382191] sas: ex 500e004aaaaaaa1f phy0 originated BROADCAST(CHANGE)
[70734.382193] sas: ex 500e004aaaaaaa1f phy0 new device attached
[70734.382262] sas: ex 500e004aaaaaaa1f phy00:U:9 attached: 
500e004aaaaaaa00 (stp)
[70734.402596] hisi_sas_v3_hw 0000:b4:02.0: dev[18:5] found
[70734.574064] sas: done REVALIDATING DOMAIN on port 0, pid:311546, res 0x0
[70734.580049] sas: Enter sas_scsi_recover_host busy: 0 failed: 0
[70734.580064] sas: ata370: end_device-7:0:4: dev error handler
[70734.580066] sas: ata371: end_device-7:0:5: dev error handler
[70734.580071] sas: ata373: end_device-7:0:1: dev error handler
[70734.580075] sas: ata374: end_device-7:0:2: dev error handler
[70734.580076] sas: ata375: end_device-7:0:3: dev error handler
[70734.580077] sas: ata376: end_device-7:0:0: dev error handler
[70736.776755] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4013 task=00000000113fa417 dev id=18 sas_addr=0x500e004aaaaaaa00 CQ 
hdr: 0x101b 0x120fad 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[70736.813168] sas: sas_to_ata_err: Saw error 135. What to do?
[70736.813169] sas: sas_ata_task_done: SAS error 87
[70736.813201] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4014 task=0000000037bc53e5 dev id=18 sas_addr=0x500e004aaaaaaa00 CQ 
hdr: 0x203 0x120fae 0x0 0x100 Error info: 0x0 0x0 0x0 0x0
[70736.850261] ata376.00: failed to IDENTIFY (I/O error, err_mask=0x4)
[70741.992742] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4032 task=00000000fe3b3918 dev id=18 sas_addr=0x500e004aaaaaaa00 CQ 
hdr: 0x101b 0x120fc0 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[70742.030820] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[70742.044539] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4033 task=00000000fe3b3918 dev id=18 sas_addr=0x500e004aaaaaaa00 CQ 
hdr: 0x101b 0x120fc1 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[70742.083611] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[70742.097548] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4034 task=00000000fe3b3918 dev id=18 sas_addr=0x500e004aaaaaaa00 CQ 
hdr: 0x101b 0x120fc2 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[70742.137553] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[70742.151829] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: executing 
internal task failed!
[70742.174491] hisi_sas_v3_hw 0000:b4:02.0: ata disk reset failed
[70742.187938] hisi_sas_v3_hw 0000:b4:02.0: I_T nexus reset: softreset 
failed (-5)
[70744.392769] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4037 task=00000000fe3b3918 dev id=18 sas_addr=0x500e004aaaaaaa00 CQ 
hdr: 0x203 0x120fc5 0x0 0x100 Error info: 0x0 0x0 0x0 0x0
[70744.433129] ata376.00: failed to IDENTIFY (I/O error, err_mask=0x4)
[70749.416741] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4055 task=000000005dbdb66e dev id=18 sas_addr=0x500e004aaaaaaa00 CQ 
hdr: 0x101b 0x120fd7 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[70749.457819] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[70749.472339] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4056 task=000000005dbdb66e dev id=18 sas_addr=0x500e004aaaaaaa00 CQ 
hdr: 0x101b 0x120fd8 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[70749.513046] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[70749.527425] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4057 task=000000005dbdb66e dev id=18 sas_addr=0x500e004aaaaaaa00 CQ 
hdr: 0x101b 0x120fd9 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[70749.567887] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[70749.582146] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: executing 
internal task failed!
[70749.604974] hisi_sas_v3_hw 0000:b4:02.0: ata disk reset failed
[70749.618406] hisi_sas_v3_hw 0000:b4:02.0: I_T nexus reset: softreset 
failed (-5)
[70751.816753] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4061 task=000000005dbdb66e dev id=18 sas_addr=0x500e004aaaaaaa00 CQ 
hdr: 0x203 0x120fdd 0x0 0x100 Error info: 0x0 0x0 0x0 0x0
[70751.856789] ata376.00: failed to IDENTIFY (I/O error, err_mask=0x4)
[70756.840742] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4079 task=00000000e8bba149 dev id=18 sas_addr=0x500e004aaaaaaa00 CQ 
hdr: 0x101b 0x120fef 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[70756.881620] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[70756.896277] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4080 task=00000000e8bba149 dev id=18 sas_addr=0x500e004aaaaaaa00 CQ 
hdr: 0x101b 0x120ff0 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[70756.937020] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[70756.951407] hisi_sas_v3_hw 0000:b4:02.0: erroneous completion 
iptt=4081 task=00000000e8bba149 dev id=18 sas_addr=0x500e004aaaaaaa00 CQ 
hdr: 0x101b 0x120ff1 0x0 0x0 Error info: 0x200 0x0 0x0 0x0
[70756.991856] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: open reject failed
[70757.006124] hisi_sas_v3_hw 0000:b4:02.0: abort tmf: executing 
internal task failed!
[70757.029005] hisi_sas_v3_hw 0000:b4:02.0: ata disk reset failed
[70757.042455] hisi_sas_v3_hw 0000:b4:02.0: I_T nexus reset: softreset 
failed (-5)
[70759.240774] sas: --- Exit sas_scsi_recover_host: busy: 0 failed: 0 
tries: 1
[70759.250828] sas: sas_probe_sata: for exp-attached device 
500e004aaaaaaa00 returned -19
[70759.250845] hisi_sas_v3_hw 0000:b4:02.0: dev[18:5] is gone
[70759.264497] sas: broadcast received: 0
[70759.280050] sas: REVALIDATING DOMAIN on port 0, pid:311546
[70759.280189] sas: Expander phy change count has changed
[70759.281879] sas: ex 500e004aaaaaaa1f phy0 originated BROADCAST(CHANGE)
[70759.281880] sas: ex 500e004aaaaaaa1f phy0 new device attached
[70759.281940] sas: ex 500e004aaaaaaa1f phy00:U:A attached: 
500e004aaaaaaa00 (stp)
[70759.305377] hisi_sas_v3_hw 0000:b4:02.0: dev[19:5] found
[70759.478056] sas: done REVALIDATING DOMAIN on port 0, pid:311546, res 0x0
[70759.487508] sas: Enter sas_scsi_recover_host busy: 0 failed: 0
[70759.487522] sas: ata370: end_device-7:0:4: dev error handler
[70759.487527] sas: ata371: end_device-7:0:5: dev error handler
[70759.487530] sas: ata373: end_device-7:0:1: dev error handler
[70759.487539] sas: ata374: end_device-7:0:2: dev error handler
[70759.487544] sas: ata375: end_device-7:0:3: dev error handler
[70759.487572] sas: ata377: end_device-7:0:0: dev error handler
[70761.674270] ata377.00: ATA-11: SAMSUNG MZ7KH960HAJR-00005, HXM7404Q, 
max UDMA/133
[70761.696856] ata377.00: 1875385008 sectors, multi 16: LBA48 NCQ (depth 
32), AA
[70761.713233] ata377.00: configured for UDMA/133
[70761.725238] sas: --- Exit sas_scsi_recover_host: busy: 0 failed: 0 
tries: 1

Thanks,
Xingui