Alex Williamson 9f47803503 vfio/pci: Use pci_try_reset_function() on initial open ... Device lock bites again; if a device .remove() callback races a user calling ioctl(VFIO_GROUP_GET_DEVICE_FD), the unbind request will hold the device lock, but the user ioctl may have already taken a vfio_device reference. In the case of a PCI device, the initial open will attempt to reset the device, which again attempts to get the device lock, resulting in deadlock. Use the trylock PCI reset interface and return error on the open path if reset fails due to lock contention. Link: https://lkml.org/lkml/2017/7/25/381 Reported-by: Wen Congyang <wencongyang2@huawei.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>		2017-07-26 14:33:15 -06:00
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Kconfig	vfio/pci: Intel IGD OpRegion support	2016-02-22 16:10:09 -07:00
Makefile	vfio/pci: Intel IGD OpRegion support	2016-02-22 16:10:09 -07:00
vfio_pci_config.c	pci-v4.10-changes	2016-12-15 12:46:48 -08:00
vfio_pci_igd.c	vfio/pci: Intel IGD host and LCP bridge config space access	2016-02-22 16:10:09 -07:00
vfio_pci_intrs.c	vfio/pci: Fix integer overflows, bitmask check	2016-10-26 13:49:29 -06:00
vfio_pci_private.h	vfio_pci: use pci_alloc_irq_vectors	2016-09-29 13:36:38 -06:00
vfio_pci_rdwr.c	vfio-pci: use 32-bit comparisons for register address for gcc-4.5	2016-12-30 08:13:47 -07:00
vfio_pci.c	vfio/pci: Use pci_try_reset_function() on initial open	2017-07-26 14:33:15 -06:00