Alex Williamson b68e7fa879 vfio: Fix virqfd release race ... vfoi-pci supports a mechanism like KVM's irqfd for unmasking an interrupt through an eventfd. There are two ways to shutdown this interface: 1) close the eventfd, 2) ioctl (such as disabling the interrupt). Both of these do the release through a workqueue, which can result in a segfault if two jobs get queued for the same virqfd. Fix this by protecting the pointer to these virqfds by a spinlock. The vfio pci device will therefore no longer have a reference to it once the release job is queued under lock. On the ioctl side, we still flush the workqueue to ensure that any outstanding releases are completed. Signed-off-by: Alex Williamson <alex.williamson@redhat.com>		2012-09-21 10:48:28 -06:00
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pci	vfio: Fix virqfd release race	2012-09-21 10:48:28 -06:00
Kconfig	vfio: Add PCI device driver	2012-07-31 08:16:24 -06:00
Makefile	vfio: Type1 IOMMU implementation	2012-07-31 08:16:23 -06:00
vfio.c	vfio: grab vfio_device reference *before* exposing the sucker via fd_install()	2012-08-22 10:26:42 -04:00
vfio_iommu_type1.c	vfio: Type1 IOMMU implementation	2012-07-31 08:16:23 -06:00