Commit a65f35cf authored by Reinette Chatre's avatar Reinette Chatre Committed by Alex Williamson
Browse files

vfio/pci: Consolidate irq cleanup on MSI/MSI-X disable 



vfio_msi_disable() releases all previously allocated state
associated with each interrupt before disabling MSI/MSI-X.

vfio_msi_disable() iterates twice over the interrupt state:
first directly with a for loop to do virqfd cleanup, followed
by another for loop within vfio_msi_set_block() that removes
the interrupt handler and its associated state using
vfio_msi_set_vector_signal().

Simplify interrupt cleanup by iterating over allocated interrupts
once.

Signed-off-by: default avatarReinette Chatre <reinette.chatre@intel.com>
Reviewed-by: default avatarKevin Tian <kevin.tian@intel.com>
Acked-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/837acb8cbe86a258a50da05e56a1f17c1a19abbe.1683740667.git.reinette.chatre@intel.com


Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent 912b625b

drivers/vfio/pci/vfio_pci_intrs.c

+1 −2
Original line number Diff line number Diff line
@@ -426,10 +426,9 @@ static void vfio_msi_disable(struct vfio_pci_core_device *vdev, bool msix) 
	for (i = 0; i < vdev->num_ctx; i++) {

		vfio_virqfd_disable(&vdev->ctx[i].unmask);

		vfio_virqfd_disable(&vdev->ctx[i].mask);

		vfio_msi_set_vector_signal(vdev, i, -1, msix);

	}



	vfio_msi_set_block(vdev, 0, vdev->num_ctx, NULL, msix);



	cmd = vfio_pci_memory_lock_and_enable(vdev);

	pci_free_irq_vectors(pdev);

	vfio_pci_memory_unlock_and_restore(vdev, cmd);