[Qemu-devel] [PATCH 12/16] pci-assign: propagate errors from assigned_dev_register_msix_mmio()

[Laszlo Ersek <lersek@redhat.com>]

The return type is also changed from "int" to "void", because it was used
in a success vs. failure sense only (the caller didn't distinguish error
codes from each other, and even assigned_dev_register_msix_mmio() masked
mmap()'s errno values with a common -EFAULT).

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
---
 hw/i386/kvm/pci-assign.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/hw/i386/kvm/pci-assign.c b/hw/i386/kvm/pci-assign.c
index 2de6559..3a904e8 100644
--- a/hw/i386/kvm/pci-assign.c
+++ b/hw/i386/kvm/pci-assign.c
@@ -1642,24 +1642,23 @@ static void assigned_dev_msix_reset(AssignedDevice *dev)
     for (i = 0, entry = dev->msix_table; i < dev->msix_max; i++, entry++) {
         entry->ctrl = cpu_to_le32(0x1); /* Masked */
     }
 }
 
-static int assigned_dev_register_msix_mmio(AssignedDevice *dev)
+static void assigned_dev_register_msix_mmio(AssignedDevice *dev, Error **errp)
 {
     dev->msix_table = mmap(NULL, MSIX_PAGE_SIZE, PROT_READ|PROT_WRITE,
                            MAP_ANONYMOUS|MAP_PRIVATE, 0, 0);
     if (dev->msix_table == MAP_FAILED) {
-        error_report("fail allocate msix_table! %s", strerror(errno));
-        return -EFAULT;
+        error_setg_errno(errp, errno, "failed to allocate msix_table");
+        return;
     }
 
     assigned_dev_msix_reset(dev);
 
     memory_region_init_io(&dev->mmio, OBJECT(dev), &assigned_dev_msix_mmio_ops,
                           dev, "assigned-dev-msix", MSIX_PAGE_SIZE);
-    return 0;
 }
 
 static void assigned_dev_unregister_msix_mmio(AssignedDevice *dev)
 {
     if (!dev->msix_table) {
@@ -1786,11 +1785,14 @@ static int assigned_initfn(struct PCIDevice *pci_dev)
         goto out;
     }
 
     /* intercept MSI-X entry page in the MMIO */
     if (dev->cap.available & ASSIGNED_DEVICE_CAP_MSIX) {
-        if (assigned_dev_register_msix_mmio(dev)) {
+        assigned_dev_register_msix_mmio(dev, &local_err);
+        if (local_err) {
+            qerror_report_err(local_err);
+            error_free(local_err);
             goto out;
         }
     }
 
     /* handle real device's MMIO/PIO BARs */
-- 
1.8.3.1