https://lists.ubuntu.com/archives/kernel-team/2019-December/106550.html
** Description changed: + [Impact] + Some SAS devices is gone when recovering + + [Test Case] + No known test case, stress test on SAS deivce. + + [Fix] + e74006edd0d4 scsi: hisi_sas: Fix the conflict between device gone and host reset + + [Regression Risk] + Patch restricted to hisi_sas driver. + + "[Steps to Reproduce] 1. Close all the PHYS; - 2. Inject error; - 3. Open one PHY; + 2. Inject error; + 3. Open one PHY; [Actual Results] Some disk will be lost [Expected Results] No disk will be lost [Reproducibility] occasionally [Additional information] Hardware: D06 CS Firmware: NA+I59 Kernel: NA [Resolution] When init device for SAS disks, it will send TMF IO to clear disks. At that time TMF IO is broken by some operations such as injecting controller reset from HW RAs event, the TMF IO will be timeout, and at last device will be gone. Print is as followed: hisi_sas_v3_hw 0000:74:02.0: dev[240:1] found ... hisi_sas_v3_hw 0000:74:02.0: controller resetting... hisi_sas_v3_hw 0000:74:02.0: phyup: phy7 link_rate=10(sata) hisi_sas_v3_hw 0000:74:02.0: phyup: phy0 link_rate=9(sata) hisi_sas_v3_hw 0000:74:02.0: phyup: phy1 link_rate=9(sata) hisi_sas_v3_hw 0000:74:02.0: phyup: phy2 link_rate=9(sata) hisi_sas_v3_hw 0000:74:02.0: phyup: phy3 link_rate=9(sata) hisi_sas_v3_hw 0000:74:02.0: phyup: phy6 link_rate=10(sata) hisi_sas_v3_hw 0000:74:02.0: phyup: phy5 link_rate=11 hisi_sas_v3_hw 0000:74:02.0: phyup: phy4 link_rate=11 hisi_sas_v3_hw 0000:74:02.0: controller reset complete hisi_sas_v3_hw 0000:74:02.0: abort tmf: TMF task timeout and not done hisi_sas_v3_hw 0000:74:02.0: dev[240:1] is gone sas: driver on host 0000:74:02.0 cannot handle device 5000c500a75a860d, error:5 To improve the reliability, retry TMF IO max of 3 times for SAS disks which is the same as softreset does." scsi: hisi_sas: Fix the conflict between device gone and host reset -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1853997 Title: [sas-1126]scsi: hisi_sas: Fix the conflict between device gone and host reset To manage notifications about this bug go to: https://bugs.launchpad.net/kunpeng920/+bug/1853997/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
