[PATCH V4 19/43] vfio/pci: vfio_notifier_init

[Steve Sistare <steven.sistare@oracle.com>]

Move event_notifier_init calls to a helper vfio_notifier_init.
This version is trivial, but it will be expanded to support CPR
in subsequent patches.  No functional change.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
---
 hw/vfio/pci.c | 40 +++++++++++++++++++++++++---------------
 1 file changed, 25 insertions(+), 15 deletions(-)

diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index 2d6dc54..12386a8 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -57,6 +57,16 @@ static void vfio_disable_interrupts(VFIOPCIDevice *vdev);
 static void vfio_mmap_set_enabled(VFIOPCIDevice *vdev, bool enabled);
 static void vfio_msi_disable_common(VFIOPCIDevice *vdev);
 
+static bool vfio_notifier_init(EventNotifier *e, const char *name, Error **errp)
+{
+    int ret = event_notifier_init(e, 0);
+
+    if (ret) {
+        error_setg_errno(errp, -ret, "vfio_notifier_init %s failed", name);
+    }
+    return !ret;
+}
+
 /*
  * Disabling BAR mmaping can be slow, but toggling it around INTx can
  * also be a huge overhead.  We try to get the best of both worlds by
@@ -137,8 +147,7 @@ static bool vfio_intx_enable_kvm(VFIOPCIDevice *vdev, Error **errp)
     pci_irq_deassert(&vdev->pdev);
 
     /* Get an eventfd for resample/unmask */
-    if (event_notifier_init(&vdev->intx.unmask, 0)) {
-        error_setg(errp, "event_notifier_init failed eoi");
+    if (!vfio_notifier_init(&vdev->intx.unmask, "intx-unmask", errp)) {
         goto fail;
     }
 
@@ -269,7 +278,6 @@ static bool vfio_intx_enable(VFIOPCIDevice *vdev, Error **errp)
     uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1);
     Error *err = NULL;
     int32_t fd;
-    int ret;
 
 
     if (!pin) {
@@ -292,9 +300,7 @@ static bool vfio_intx_enable(VFIOPCIDevice *vdev, Error **errp)
     }
 #endif
 
-    ret = event_notifier_init(&vdev->intx.interrupt, 0);
-    if (ret) {
-        error_setg_errno(errp, -ret, "event_notifier_init failed");
+    if (!vfio_notifier_init(&vdev->intx.interrupt, "intx-interrupt", errp)) {
         return false;
     }
     fd = event_notifier_get_fd(&vdev->intx.interrupt);
@@ -474,11 +480,13 @@ static void vfio_add_kvm_msi_virq(VFIOPCIDevice *vdev, VFIOMSIVector *vector,
 
 static void vfio_connect_kvm_msi_virq(VFIOMSIVector *vector)
 {
+    const char *name = "kvm_interrupt";
+
     if (vector->virq < 0) {
         return;
     }
 
-    if (event_notifier_init(&vector->kvm_interrupt, 0)) {
+    if (!vfio_notifier_init(&vector->kvm_interrupt, name, NULL)) {
         goto fail_notifier;
     }
 
@@ -516,11 +524,12 @@ static void vfio_pci_vector_init(VFIOPCIDevice *vdev, int nr)
 {
     VFIOMSIVector *vector = &vdev->msi_vectors[nr];
     PCIDevice *pdev = &vdev->pdev;
+    Error *err = NULL;
 
     vector->vdev = vdev;
     vector->virq = -1;
-    if (event_notifier_init(&vector->interrupt, 0)) {
-        error_report("vfio: Error: event_notifier_init failed");
+    if (!vfio_notifier_init(&vector->interrupt, "interrupt", &err)) {
+        error_report_err(err);
     }
     vector->use = true;
     if (vdev->interrupt == VFIO_INT_MSIX) {
@@ -750,13 +759,14 @@ retry:
 
     for (i = 0; i < vdev->nr_vectors; i++) {
         VFIOMSIVector *vector = &vdev->msi_vectors[i];
+        Error *err = NULL;
 
         vector->vdev = vdev;
         vector->virq = -1;
         vector->use = true;
 
-        if (event_notifier_init(&vector->interrupt, 0)) {
-            error_report("vfio: Error: event_notifier_init failed");
+        if (!vfio_notifier_init(&vector->interrupt, "interrupt", &err)) {
+            error_report_err(err);
         }
 
         qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
@@ -2908,8 +2918,8 @@ static void vfio_register_err_notifier(VFIOPCIDevice *vdev)
         return;
     }
 
-    if (event_notifier_init(&vdev->err_notifier, 0)) {
-        error_report("vfio: Unable to init event notifier for error detection");
+    if (!vfio_notifier_init(&vdev->err_notifier, "err_notifier", &err)) {
+        error_report_err(err);
         vdev->pci_aer = false;
         return;
     }
@@ -2975,8 +2985,8 @@ static void vfio_register_req_notifier(VFIOPCIDevice *vdev)
         return;
     }
 
-    if (event_notifier_init(&vdev->req_notifier, 0)) {
-        error_report("vfio: Unable to init event notifier for device request");
+    if (!vfio_notifier_init(&vdev->req_notifier, "req_notifier", &err)) {
+        error_report_err(err);
         return;
     }
 
-- 
1.8.3.1