vfio/pci: Use never-managed version of pci_intx()

pci_intx() is a hybrid function which can sometimes be managed through
devres. To remove this hybrid nature from pci_intx(), it is necessary to
port users to either an always-managed or a never-managed version.

vfio enables its PCI device with pci_enable_device(). Thus, it needs the
never-managed version.

Replace pci_intx() with pci_intx_unmanaged().

Link: https://lore.kernel.org/r/20241209130632.132074-8-pstanner@redhat.com
Signed-off-by: Philipp Stanner <pstanner@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>

Author: Philipp Stanner

drivers/vfio/pci/vfio_pci_core.c

@@ -498,7 +498,7 @@ int vfio_pci_core_enable(struct vfio_pci_core_device *vdev)
 		if (vfio_pci_nointx(pdev)) {
 			pci_info(pdev, "Masking broken INTx support\n");
 			vdev->nointx = true;
-			pci_intx(pdev, 0);
+			pci_intx_unmanaged(pdev, 0);
 		} else
 			vdev->pci_2_3 = pci_intx_mask_supported(pdev);
 	}

drivers/vfio/pci/vfio_pci_intrs.c

@@ -118,7 +118,7 @@ static bool __vfio_pci_intx_mask(struct vfio_pci_core_device *vdev)
 	 */
 	if (unlikely(!is_intx(vdev))) {
 		if (vdev->pci_2_3)
-			pci_intx(pdev, 0);
+			pci_intx_unmanaged(pdev, 0);
 		goto out_unlock;
 	}
 
@@ -132,7 +132,7 @@ static bool __vfio_pci_intx_mask(struct vfio_pci_core_device *vdev)
 		 * mask, not just when something is pending.
 		 */
 		if (vdev->pci_2_3)
-			pci_intx(pdev, 0);
+			pci_intx_unmanaged(pdev, 0);
 		else
 			disable_irq_nosync(pdev->irq);
 
@@ -178,7 +178,7 @@ static int vfio_pci_intx_unmask_handler(void *opaque, void *data)
 	 */
 	if (unlikely(!is_intx(vdev))) {
 		if (vdev->pci_2_3)
-			pci_intx(pdev, 1);
+			pci_intx_unmanaged(pdev, 1);
 		goto out_unlock;
 	}
 
@@ -296,7 +296,7 @@ static int vfio_intx_enable(struct vfio_pci_core_device *vdev,
 	 */
 	ctx->masked = vdev->virq_disabled;
 	if (vdev->pci_2_3) {
-		pci_intx(pdev, !ctx->masked);
+		pci_intx_unmanaged(pdev, !ctx->masked);
 		irqflags = IRQF_SHARED;
 	} else {
 		irqflags = ctx->masked ? IRQF_NO_AUTOEN : 0;
@@ -569,7 +569,7 @@ static void vfio_msi_disable(struct vfio_pci_core_device *vdev, bool msix)
 	 * via their shutdown paths.  Restore for NoINTx devices.
 	 */
 	if (vdev->nointx)
-		pci_intx(pdev, 0);
+		pci_intx_unmanaged(pdev, 0);
 
 	vdev->irq_type = VFIO_PCI_NUM_IRQS;
 }