2 files changed, 9 insertions, 81 deletions

diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index d5dbdb9d24d8..9ecfcdcdd6d6 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -1314,9 +1314,6 @@ static int rebind_irq_to_cpu(unsigned irq, unsigned tcpu)
 	if (!VALID_EVTCHN(evtchn))
 		return -1;
 
-	if (!xen_support_evtchn_rebind())
-		return -1;
-
 	/* Send future instances of this interrupt to other vcpu. */
 	bind_vcpu.port = evtchn;
 	bind_vcpu.vcpu = xen_vcpu_nr(tcpu);
@@ -1650,20 +1647,15 @@ void xen_callback_vector(void)
 {
 	int rc;
 	uint64_t callback_via;
-	if (xen_have_vector_callback) {
-		callback_via = HVM_CALLBACK_VECTOR(HYPERVISOR_CALLBACK_VECTOR);
-		rc = xen_set_callback_via(callback_via);
-		if (rc) {
-			pr_err("Request for Xen HVM callback vector failed\n");
-			xen_have_vector_callback = 0;
-			return;
-		}
-		pr_info("Xen HVM callback vector for event delivery is enabled\n");
-		/* in the restore case the vector has already been allocated */
-		if (!test_bit(HYPERVISOR_CALLBACK_VECTOR, used_vectors))
-			alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR,
-					xen_hvm_callback_vector);
-	}
+
+	callback_via = HVM_CALLBACK_VECTOR(HYPERVISOR_CALLBACK_VECTOR);
+	rc = xen_set_callback_via(callback_via);
+	BUG_ON(rc);
+	pr_info("Xen HVM callback vector for event delivery is enabled\n");
+	/* in the restore case the vector has already been allocated */
+	if (!test_bit(HYPERVISOR_CALLBACK_VECTOR, used_vectors))
+		alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR,
+				xen_hvm_callback_vector);
 }
 #else
 void xen_callback_vector(void) {}
diff --git a/drivers/xen/platform-pci.c b/drivers/xen/platform-pci.c
index cf9666680c8c..b59c9455aae1 100644
--- a/drivers/xen/platform-pci.c
+++ b/drivers/xen/platform-pci.c
@@ -42,7 +42,6 @@
 static unsigned long platform_mmio;
 static unsigned long platform_mmio_alloc;
 static unsigned long platform_mmiolen;
-static uint64_t callback_via;
 
 static unsigned long alloc_xen_mmio(unsigned long len)
 {
@@ -55,51 +54,6 @@ static unsigned long alloc_xen_mmio(unsigned long len)
 	return addr;
 }
 
-static uint64_t get_callback_via(struct pci_dev *pdev)
-{
-	u8 pin;
-	int irq;
-
-	irq = pdev->irq;
-	if (irq < 16)
-		return irq; /* ISA IRQ */
-
-	pin = pdev->pin;
-
-	/* We don't know the GSI. Specify the PCI INTx line instead. */
-	return ((uint64_t)0x01 << 56) | /* PCI INTx identifier */
-		((uint64_t)pci_domain_nr(pdev->bus) << 32) |
-		((uint64_t)pdev->bus->number << 16) |
-		((uint64_t)(pdev->devfn & 0xff) << 8) |
-		((uint64_t)(pin - 1) & 3);
-}
-
-static irqreturn_t do_hvm_evtchn_intr(int irq, void *dev_id)
-{
-	xen_hvm_evtchn_do_upcall();
-	return IRQ_HANDLED;
-}
-
-static int xen_allocate_irq(struct pci_dev *pdev)
-{
-	return request_irq(pdev->irq, do_hvm_evtchn_intr,
-			IRQF_NOBALANCING | IRQF_TRIGGER_RISING,
-			"xen-platform-pci", pdev);
-}
-
-static int platform_pci_resume(struct pci_dev *pdev)
-{
-	int err;
-	if (xen_have_vector_callback)
-		return 0;
-	err = xen_set_callback_via(callback_via);
-	if (err) {
-		dev_err(&pdev->dev, "platform_pci_resume failure!\n");
-		return err;
-	}
-	return 0;
-}
-
 static int platform_pci_probe(struct pci_dev *pdev,
 			      const struct pci_device_id *ent)
 {
@@ -138,21 +92,6 @@ static int platform_pci_probe(struct pci_dev *pdev,
 	platform_mmio = mmio_addr;
 	platform_mmiolen = mmio_len;
 
-	if (!xen_have_vector_callback) {
-		ret = xen_allocate_irq(pdev);
-		if (ret) {
-			dev_warn(&pdev->dev, "request_irq failed err=%d\n", ret);
-			goto out;
-		}
-		callback_via = get_callback_via(pdev);
-		ret = xen_set_callback_via(callback_via);
-		if (ret) {
-			dev_warn(&pdev->dev, "Unable to set the evtchn callback "
-					 "err=%d\n", ret);
-			goto out;
-		}
-	}
-
 	max_nr_gframes = gnttab_max_grant_frames();
 	grant_frames = alloc_xen_mmio(PAGE_SIZE * max_nr_gframes);
 	ret = gnttab_setup_auto_xlat_frames(grant_frames);
@@ -184,9 +123,6 @@ static struct pci_driver platform_driver = {
 	.name =           DRV_NAME,
 	.probe =          platform_pci_probe,
 	.id_table =       platform_pci_tbl,
-#ifdef CONFIG_PM
-	.resume_early =   platform_pci_resume,
-#endif
 };
 
 static int __init platform_pci_init(void)