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60720a0fc6
There's a small window between the vfio bus driver calling vfio_del_group_dev() and the device being completely unbound where the vfio group appears to be non-viable. This creates a race for users like QEMU/KVM where the kvm-vfio module tries to get an external reference to the group in order to match and release an existing reference, while the device is potentially being removed from the vfio bus driver. If the group is momentarily non-viable, kvm-vfio may not be able to release the group reference until VM shutdown, making the group unusable until that point. Bridge the gap between device removal from the group and completion of the driver unbind by tracking it in a list. The device is added to the list before the bus driver reference is released and removed using the existing unbind notifier. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> |
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| .. | ||
| pci | ||
| Kconfig | ||
| Makefile | ||
| vfio_iommu_spapr_tce.c | ||
| vfio_iommu_type1.c | ||
| vfio_spapr_eeh.c | ||
| vfio.c | ||