Public bug reported: Part of the transparent SR-IOV series appears to be missing from 4.13.
PCI: hv: Do not sleep in compose_msi_msg() https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=80bfeeb9dd6b54ac108c884c792f0fc7d4912bee The setup of MSI with Hyper-V host was sleeping with locks held. This error is reported when doing SR-IOV hotplug with kernel built with lockdep: BUG: sleeping function called from invalid context at kernel/sched/completion.c:93 in_atomic(): 1, irqs_disabled(): 1, pid: 1405, name: ip 3 locks held by ip/1405: #0: (rtnl_mutex){+.+.+.}, at: [<ffffffff976b10bb>] rtnetlink_rcv+0x1b/0x40 #1: (&desc->request_mutex){+.+...}, at: [<ffffffff970ddd33>] __setup_irq+0xb3/0x720 #2: (&irq_desc_lock_class){-.-...}, at: [<ffffffff970ddd65>] __setup_irq+0xe5/0x720 irq event stamp: 3476 hardirqs last enabled at (3475): [<ffffffff971b3005>] get_page_from_freelist+0x225/0xc90 hardirqs last disabled at (3476): [<ffffffff978024e7>] _raw_spin_lock_irqsave+0x27/0x90 softirqs last enabled at (2446): [<ffffffffc05ef0b0>] ixgbevf_configure+0x380/0x7c0 [ixgbevf] softirqs last disabled at (2444): [<ffffffffc05ef08d>] ixgbevf_configure+0x35d/0x7c0 [ixgbevf] The workaround is to poll for host response instead of blocking on completion. Please add this to linux-azure on 4.13. ** Affects: linux-azure (Ubuntu) Importance: Undecided Status: Confirmed ** Changed in: linux-azure (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1747543 Title: [Hyper-V] linux-azure: PCI: hv: Do not sleep in compose_msi_msg() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1747543/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
