• Alex Williamson's avatar
    vfio-pci: Enable device before attempting reset · 9a92c509
    Alex Williamson authored
    Devices making use of PM reset are getting incorrectly identified as
    not supporting reset because pci_pm_reset() fails unless the device is
    in D0 power state.  When first attached to vfio_pci devices are
    typically in an unknown power state.  We can fix this by explicitly
    setting the power state or simply calling pci_enable_device() before
    attempting a pci_reset_function().  We need to enable the device
    anyway, so move this up in our vfio_pci_enable() function, which also
    simplifies the error path a bit.
    
    Note that pci_disable_device() does not explicitly set the power
    state, so there's no need to re-order vfio_pci_disable().
    Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
    9a92c509
vfio_pci.c 14.8 KB