Public bug reported: == Comment: #0 - UMA KRISHNAN <[email protected]> - 2015-11-18 16:27:06 == ---Problem Description--- When FC login times out, cxlflash resets the link. As part of reset, when the link comes back up, cxlflash driver calls scsi_scan_host() and in case previous scan is still running we get the message and stack dump on console/logs.
scsi host2: scsi_prep_async_scan called twice CPU: 16 PID: 55 Comm: kworker/16:1 Not tainted 4.2.0-439-f9a408a+ #1 Workqueue: events cxlflash_worker_thread [cxlflash] Call Trace: [c00000078bea7ae0] [c000000000a6e720] dump_stack+0x90/0xbc (unreliable) [c00000078bea7b10] [c0000000006f539c] scsi_scan_host+0x28c/0x2a0 [c00000078bea7bb0] [d000000004085344] cxlflash_worker_thread+0x144/0x430 [cxlflash] [c00000078bea7c50] [c0000000000d8b64] process_one_work+0x1a4/0x4c0 [c00000078bea7ce0] [c0000000000d9014] worker_thread+0x194/0x5f0 [c00000078bea7d80] [c0000000000e1630] kthread+0x110/0x130 [c00000078bea7e30] [c000000000009530] ret_from_kernel_thread+0x5c/0xac cxlflash 0009:00:00.0: cxlflash_async_err_irq: FC Port 1 -> login succeeded, fc_status 0x114001D80000F This message is alarming to customers. Community has already fixed this. We would like to see the upstreamed commit a4cf30e15ccea82a07fa5870e8af787b9ea1a672 (scsi_scan: don't dump trace when scsi_prep_async_scan() is called twice) backported to Ubuntu 15.10 (Wily) SRU stream. ---uname output--- Linux tul83p1 4.2.0-444-5b49ef1+ #1 SMP Wed Nov 18 12:44:21 CST 2015 ppc64le ppc64le ppc64le GNU/Linux Machine Type = 8286-42A ---Debugger--- A debugger is not configured ---Steps to Reproduce--- Simply disconnecting the adapter and plugging it back in, triggers this scenario. Contact Information = [email protected] Stack trace output: no Oops output: no System Dump Info: The system is not configured to capture a system dump. *Additional Instructions for [email protected]: -Attach sysctl -a output output to the bug. ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Taco Screen team (taco-screen-team) Status: New ** Tags: architecture-ppc64le bugnameltc-133324 severity-medium targetmilestone-inin--- ** Tags added: architecture-ppc64le bugnameltc-133324 severity-medium targetmilestone-inin--- ** Changed in: ubuntu Assignee: (unassigned) => Taco Screen team (taco-screen-team) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1517942 Title: Backport upstream commit to Ubuntu 15.10 (Wily) SRU stream To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1517942/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
