I don't see the issue you are reporting. I don't have the storage device that uses this driver, but I am able to install the new kernel from PPA and load the qla2xxx driver on our P9.
ubuntu@dradis:~$ uname -a Linux dradis 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:14:44 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux ubuntu@dradis:~$ sudo add-apt-repository -y ppa:ubuntu-power- triage/lp1770003 ubuntu@dradis:~$ apt search linux-image-unsigned Sorting... Done Full Text Search... Done linux-image-unsigned-4.15.0-20-generic/bionic 4.15.0-20.23~lp1770003+build.7 ppc64el Linux kernel image for version 4.15.0 on PowerPC 64el SMP ubuntu@dradis:~$ apt search linux-modules Sorting... Done Full Text Search... Done linux-modules-4.15.0-20-generic/bionic 4.15.0-20.23~lp1770003+build.7 ppc64el [upgradable from: 4.15.0-20.21] Linux kernel extra modules for version 4.15.0 on PowerPC 64el SMP linux-modules-extra-4.15.0-20-generic/bionic 4.15.0-20.23~lp1770003+build.7 ppc64el [upgradable from: 4.15.0-20.21] Linux kernel extra modules for version 4.15.0 on PowerPC 64el SMP ubuntu@dradis:~$ sudo apt install -y --assume-yes linux-image-unsigned-4.15.0-20-generic linux-modules-4.15.0-20-generic linux-modules-extra-4.15.0-20-generic Reading package lists... Done Building dependency tree Reading state information... Done The following package was automatically installed and is no longer required: linux-headers-generic Use 'sudo apt autoremove' to remove it. Suggested packages: fdutils linux-doc-4.15.0 | linux-source-4.15.0 linux-tools The following packages will be REMOVED: linux-generic linux-image-4.15.0-20-generic linux-image-generic The following NEW packages will be installed: linux-image-unsigned-4.15.0-20-generic The following packages will be upgraded: linux-modules-4.15.0-20-generic linux-modules-extra-4.15.0-20-generic 2 upgraded, 1 newly installed, 3 to remove and 2 not upgraded. Need to get 50.1 MB of archives. After this operation, 72.7 kB of additional disk space will be used. Get:1 http://ppa.launchpad.net/ubuntu-power-triage/lp1770003/ubuntu bionic/main ppc64el linux-image-unsigned-4.15.0-20-generic ppc64el 4.15.0-20.23~lp1770003+build.7 [6143 kB] Get:2 http://ppa.launchpad.net/ubuntu-power-triage/lp1770003/ubuntu bionic/main ppc64el linux-modules-4.15.0-20-generic ppc64el 4.15.0-20.23~lp1770003+build.7 [12.5 MB] Get:3 http://ppa.launchpad.net/ubuntu-power-triage/lp1770003/ubuntu bionic/main ppc64el linux-modules-extra-4.15.0-20-generic ppc64el 4.15.0-20.23~lp1770003+build.7 [31.5 MB] Fetched 50.1 MB in 1min 10s (714 kB/s) (Reading database ... 64762 files and directories currently installed.) Removing linux-generic (4.15.0.20.23) ... Removing linux-image-generic (4.15.0.20.23) ... dpkg: linux-image-4.15.0-20-generic: dependency problems, but removing anyway as you requested: linux-modules-extra-4.15.0-20-generic depends on linux-image-4.15.0-20-generic | linux-image-unsigned-4.15.0-20-generic; however: Package linux-image-4.15.0-20-generic is to be removed. Package linux-image-unsigned-4.15.0-20-generic is not installed. Removing linux-image-4.15.0-20-generic (4.15.0-20.21) ... W: Removing the running kernel W: Last kernel image has been removed, so removing the default symlinks /etc/kernel/postrm.d/initramfs-tools: update-initramfs: Deleting /boot/initrd.img-4.15.0-20-generic /etc/kernel/postrm.d/zz-update-grub: Generating grub configuration file ... done Selecting previously unselected package linux-image-unsigned-4.15.0-20-generic. (Reading database ... 64752 files and directories currently installed.) Preparing to unpack .../linux-image-unsigned-4.15.0-20-generic_4.15.0-20.23~lp1770003+build.7_ppc64el.deb ... Unpacking linux-image-unsigned-4.15.0-20-generic (4.15.0-20.23~lp1770003+build.7) ... Preparing to unpack .../linux-modules-4.15.0-20-generic_4.15.0-20.23~lp1770003+build.7_ppc64el.deb ... Unpacking linux-modules-4.15.0-20-generic (4.15.0-20.23~lp1770003+build.7) over (4.15.0-20.21) ... Preparing to unpack .../linux-modules-extra-4.15.0-20-generic_4.15.0-20.23~lp1770003+build.7_ppc64el.deb ... Unpacking linux-modules-extra-4.15.0-20-generic (4.15.0-20.23~lp1770003+build.7) over (4.15.0-20.21) ... Setting up linux-modules-4.15.0-20-generic (4.15.0-20.23~lp1770003+build.7) ... Setting up linux-image-unsigned-4.15.0-20-generic (4.15.0-20.23~lp1770003+build.7) ... I: /boot/vmlinux.old is now a symlink to vmlinux-4.15.0-20-generic I: /boot/initrd.img.old is now a symlink to initrd.img-4.15.0-20-generic I: /boot/vmlinux is now a symlink to vmlinux-4.15.0-20-generic I: /boot/initrd.img is now a symlink to initrd.img-4.15.0-20-generic Setting up linux-modules-extra-4.15.0-20-generic (4.15.0-20.23~lp1770003+build.7) ... Processing triggers for linux-image-unsigned-4.15.0-20-generic (4.15.0-20.23~lp1770003+build.7) ... /etc/kernel/postinst.d/initramfs-tools: update-initramfs: Generating /boot/initrd.img-4.15.0-20-generic W: Possible missing firmware /lib/firmware/ast_dp501_fw.bin for module ast /etc/kernel/postinst.d/zz-update-grub: Generating grub configuration file ... Found linux image: /boot/vmlinux-4.15.0-20-generic Found initrd image: /boot/initrd.img-4.15.0-20-generic done ubuntu@dradis:~$ sudo reboot ubuntu@dradis:~$ uname -a Linux dradis 4.15.0-20-generic #23~lp1770003+build.7-Ubuntu SMP Thu May 10 14:31:31 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux ubuntu@dradis:~$ sudo modprobe qla2xxx ubuntu@dradis:~$ lsmod | grep qla2xxx qla2xxx 929342 0 nvme_fc 37652 1 qla2xxx scsi_transport_fc 66824 1 qla2xxx ubuntu@dradis:~$ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1770003 Title: qla2xxx: Fix page fault at kmem_cache_alloc_node() Status in The Ubuntu-power-systems project: Triaged Status in linux package in Ubuntu: Triaged Status in linux source package in Bionic: Triaged Bug description: Dear Canonical, We found that the current Ubuntu kernel contains a problem related to qla2xxx driver which causes: [ 66.295233] Unable to handle kernel paging request for data at address 0x8882f6ed90e9151a [ 66.295297] Faulting instruction address: 0xc00000000038a110 cpu 0x50: Vector: 380 (Data Access Out of Range) at [c00000000692f650] pc: c00000000038a110: kmem_cache_alloc_node+0x2f0/0x350 lr: c00000000038a0fc: kmem_cache_alloc_node+0x2dc/0x350 sp: c00000000692f8d0 msr: 9000000000009033 dar: 8882f6ed90e9151a current = 0xc00000000698fd00 paca = 0xc00000000fab7000 softe: 0 irq_happened: 0x01 pid = 1762, comm = systemd-journal Linux version 4.15.0-20-generic (buildd@bos02-ppc64el-002) (gcc version 7.3.0 (Ubuntu 7.3.0-14ubuntu1)) #16-Ubuntu SMP Wed Apr 4 13:57:51 UTC 2018 (Ubuntu 4.15.0-20.21-generic 4.15.20) enter ? for help [c00000000692f8d0] c000000000389fd4 kmem_cache_alloc_node+0x1b4/0x350 (unreliable) [c00000000692f940] c000000000b2ec6c __alloc_skb+0x6c/0x220 [c00000000692f9a0] c000000000b30b6c alloc_skb_with_frags+0x7c/0x2e0 [c00000000692fa30] c000000000b247cc sock_alloc_send_pskb+0x29c/0x2c0 [c00000000692fae0] c000000000c5705c unix_dgram_sendmsg+0x15c/0x8f0 [c00000000692fbc0] c000000000b1ec64 sock_sendmsg+0x64/0x90 [c00000000692fbf0] c000000000b20abc ___sys_sendmsg+0x31c/0x390 [c00000000692fd90] c000000000b221ec __sys_sendmsg+0x5c/0xc0 [c00000000692fe30] c00000000000b184 system_call+0x58/0x6c --- Exception: c00 (System Call) at 000074826f6fa9c4 SP (7ffff5dc5510) is in userspace We were able to get rid of this problem cherry picking some of the upstream patches. Do you think they might fit in the SRU criteria? The commit ids are below and they were easily cherry picked. eaf75d1815dad230dac2f1e8f1dc0349b2d50071: scsi: qla2xxx: Fix double free bug after firmware timeout 6d67492764b39ad6efb6822816ad73dc141752f4: scsi: qla2xxx: Prevent relogin trigger from sending too many commands 7ac0c332f96bb9688560726f5e80c097ed8de59a: scsi: qla2xxx: Fix warning in qla2x00_async_iocb_timeout() 045d6ea200af794ba15515984cff63787a7fc3c0: scsi: qla2xxx: Don't call dma_free_coherent with IRQ disabled. 1ae634eb28533b82f9777a47c1ade44cb8c0182b: scsi: qla2xxx: Serialize session free in qlt_free_session_done d8630bb95f46ea118dede63bd75533faa64f9612: scsi: qla2xxx: Serialize session deletion by using work_lock Requries: 1c6cacf4ea6c04a58a0e3057f5ed60c24a4ffeff ('scsi: qla2xxx: Fixup locking for session deletion') 94cff6e114df56d0df74cdabe3481df38d9b0c1e: scsi: qla2xxx: Remove unused argument from qlt_schedule_sess_for_dele? 9cd883f07a54e5301d51e259acd250bb035996be: scsi: qla2xxx: Fix session cleanup for N2N To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1770003/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
