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Message-Id: <20230328045122.25850-1-decui@microsoft.com> Date: Mon, 27 Mar 2023 21:51:16 -0700 From: Dexuan Cui <decui@...rosoft.com> To: bhelgaas@...gle.com, davem@...emloft.net, decui@...rosoft.com, edumazet@...gle.com, haiyangz@...rosoft.com, jakeo@...rosoft.com, kuba@...nel.org, kw@...ux.com, kys@...rosoft.com, leon@...nel.org, linux-pci@...r.kernel.org, lpieralisi@...nel.org, mikelley@...rosoft.com, pabeni@...hat.com, robh@...nel.org, saeedm@...dia.com, wei.liu@...nel.org, longli@...rosoft.com, boqun.feng@...il.com Cc: linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org, netdev@...r.kernel.org Subject: [PATCH 0/6] pci-hyper: fix race condition bugs for fast device hotplug 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. The patchset is also availsble in my github branch: https://github.com/dcui/tdx/commits/decui/vpci/v6.3-rc3-v1 Please review. Thanks! 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 | 143 +++++++++++++++++----------- 1 file changed, 85 insertions(+), 58 deletions(-) -- 2.25.1
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