diff options
Diffstat (limited to 'drivers/vfio/pci/vfio_pci_intrs.c')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_intrs.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c index e40eca69a293..867327e159c1 100644 --- a/drivers/vfio/pci/vfio_pci_intrs.c +++ b/drivers/vfio/pci/vfio_pci_intrs.c @@ -428,11 +428,9 @@ static int vfio_msi_set_vector_signal(struct vfio_pci_core_device *vdev, } /* - * The MSIx vector table resides in device memory which may be cleared - * via backdoor resets. We don't allow direct access to the vector - * table so even if a userspace driver attempts to save/restore around - * such a reset it would be unsuccessful. To avoid this, restore the - * cached value of the message prior to enabling. + * If the vector was previously allocated, refresh the on-device + * message data before enabling in case it had been cleared or + * corrupted (e.g. due to backdoor resets) since writing. */ cmd = vfio_pci_memory_lock_and_enable(vdev); if (msix) { |