[Qemu-devel] [PATCH v2 02/12] vfio/pci: Pass an error object to vfio_populate_device

[Eric Auger]

Pass an error object to prepare for migration to VFIO-PCI realize.
The returned value will be removed later on.

The case where error recovery cannot be enabled is not converted into
an error object but directly reported through error_report, as before.
Populating an error instead would cause the future realize function to
fail, which is not wanted.

Signed-off-by: Eric Auger <address@hidden>

---

v1 -> v2:
- this patch now comes before the actual realize migration
- do not handle the error recovery issue as an error
---
 hw/vfio/pci.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index ca0293d..9fe970a 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -2199,7 +2199,7 @@ int vfio_populate_vga(VFIOPCIDevice *vdev)
     return 0;
 }
 
-static int vfio_populate_device(VFIOPCIDevice *vdev)
+static int vfio_populate_device(VFIOPCIDevice *vdev, Error **errp)
 {
     VFIODevice *vbasedev = &vdev->vbasedev;
     struct vfio_region_info *reg_info;
@@ -2208,18 +2208,18 @@ static int vfio_populate_device(VFIOPCIDevice *vdev)
 
     /* Sanity check device */
     if (!(vbasedev->flags & VFIO_DEVICE_FLAGS_PCI)) {
-        error_report("vfio: Um, this isn't a PCI device");
+        error_setg(errp, "this isn't a PCI device");
         goto error;
     }
 
     if (vbasedev->num_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) {
-        error_report("vfio: unexpected number of io regions %u",
-                     vbasedev->num_regions);
+        error_setg(errp, "unexpected number of io regions %u",
+                   vbasedev->num_regions);
         goto error;
     }
 
     if (vbasedev->num_irqs < VFIO_PCI_MSIX_IRQ_INDEX + 1) {
-        error_report("vfio: unexpected number of irqs %u", vbasedev->num_irqs);
+        error_setg(errp, "unexpected number of irqs %u", vbasedev->num_irqs);
         goto error;
     }
 
@@ -2231,7 +2231,7 @@ static int vfio_populate_device(VFIOPCIDevice *vdev)
         g_free(name);
 
         if (ret) {
-            error_report("vfio: Error getting region %d info: %m", i);
+            error_setg_errno(errp, -ret, "failed to get region %d info", i);
             goto error;
         }
 
@@ -2241,7 +2241,7 @@ static int vfio_populate_device(VFIOPCIDevice *vdev)
     ret = vfio_get_region_info(vbasedev,
                                VFIO_PCI_CONFIG_REGION_INDEX, &reg_info);
     if (ret) {
-        error_report("vfio: Error getting config info: %m");
+        error_setg_errno(errp, -ret, "failed to get config info");
         goto error;
     }
 
@@ -2261,8 +2261,8 @@ static int vfio_populate_device(VFIOPCIDevice *vdev)
     if (vdev->features & VFIO_FEATURE_ENABLE_VGA) {
         ret = vfio_populate_vga(vdev);
         if (ret) {
-            error_report(
-                "vfio: Device does not support requested feature x-vga");
+            error_setg_errno(errp, -ret,
+                "device does not support requested feature x-vga");
             goto error;
         }
     }
@@ -2277,7 +2277,7 @@ static int vfio_populate_device(VFIOPCIDevice *vdev)
     } else if (irq_info.count == 1) {
         vdev->pci_aer = true;
     } else {
-        error_report("vfio: %s "
+        error_report(WARN_PREFIX
                      "Could not enable error recovery for the device",
                      vbasedev->name);
     }
@@ -2561,9 +2561,9 @@ static int vfio_initfn(PCIDevice *pdev)
         goto error;
     }
 
-    ret = vfio_populate_device(vdev);
-    if (ret) {
-        return ret;
+    ret = vfio_populate_device(vdev, &err);
+    if (err) {
+        goto error;
     }
 
     /* Get a copy of config space */
-- 
1.9.1