> From: Dexuan Cui <decui@xxxxxxxxxxxxx> > Sent: Wednesday, April 19, 2023 7:41 PM > ... > Before the guest finishes probing a device, the host may be already starting > to remove the device. Currently there are multiple race condition bugs in the > pci-hyperv driver, which can cause the guest to panic. The patchset fixes > the crashes. > > The patchset also does some cleanup work: patch 3 removes the useless > hv_pcichild_state, and patch 4 reverts an old patch which is not really > useful (without patch 4, it would be hard to make patch 5 clean). > > Patch 6 removes the use of a global mutex lock, and enables async-probing > to allow concurrent device probing for faster boot. > > v3 is based on v6.3-rc5. No code change since v2. I just added Michael's > and Long Li's Reviewed-by. > ... > > Dexuan Cui (6): > PCI: hv: Fix a race condition bug in hv_pci_query_relations() > PCI: hv: Fix a race condition in hv_irq_unmask() that can cause panic > PCI: hv: Remove the useless hv_pcichild_state from struct hv_pci_dev > Revert "PCI: hv: Fix a timing issue which causes kdump to fail > occasionally" > PCI: hv: Add a per-bus mutex state_lock > PCI: hv: Use async probing to reduce boot time > > drivers/pci/controller/pci-hyperv.c | 145 +++++++++++++++++----------- > 1 file changed, 86 insertions(+), 59 deletions(-) Hi Bjorn, Lorenzo, since basically this patchset is Hyper-V stuff, I would like it to go through the hyper-v tree if you have no objection. The hyper-v tree already has one big PCI patch from Michael: https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git/commit/?h=hyperv-next&id=2c6ba4216844ca7918289b49ed5f3f7138ee2402 Thanks, Dexuan
