• Alex Williamson's avatar
    vfio-pci: Don't use device_lock around AER interrupt setup · 3be3a074
    Alex Williamson authored
    device_lock is much too prone to lockups.  For instance if we have a
    pending .remove then device_lock is already held.  If userspace
    attempts to modify AER signaling after that point, a deadlock occurs.
    eventfd setup/teardown is already protected in vfio with the igate
    mutex.  AER is not a high performance interrupt, so we can also use
    the same mutex to protect signaling versus setup races.
    Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
    3be3a074
vfio_pci.c 22.7 KB