[v5,15/17] vfio/pci: Remove vfio_msix_early_setup returned value

Commit Message

Eric Auger Oct. 6, 2016, 4:07 p.m. UTC

The returned value is not used anymore by the caller, vfio_realize,
since the error now is stored in the error object. So let's remove it.

Signed-off-by: Eric Auger <[e-mail]>
Reviewed-by: Markus Armbruster <[e-mail]>

---

Logically we could do that job for all the functions now getting an
Error object passed as a parameter to avoid duplicate information
between the error content and the returned value. This requires to use
a local error object in vfio_realize. So I am not sure this is worth
the candle.
---
 hw/vfio/pci.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

Patch

diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index d9652c2..f063c65 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -1290,7 +1290,7 @@  static void vfio_pci_fixup_msix_region(VFIOPCIDevice *vdev)
  * need to first look for where the MSI-X table lives.  So we
  * unfortunately split MSI-X setup across two functions.
  */
-static int vfio_msix_early_setup(VFIOPCIDevice *vdev, Error **errp)
+static void vfio_msix_early_setup(VFIOPCIDevice *vdev, Error **errp)
 {
     uint8_t pos;
     uint16_t ctrl;
@@ -1300,25 +1300,25 @@  static int vfio_msix_early_setup(VFIOPCIDevice *vdev, Error **errp)
 
     pos = pci_find_capability(&vdev->pdev, PCI_CAP_ID_MSIX);
     if (!pos) {
-        return 0;
+        return;
     }
 
     if (pread(fd, &ctrl, sizeof(ctrl),
               vdev->config_offset + pos + PCI_MSIX_FLAGS) != sizeof(ctrl)) {
         error_setg_errno(errp, errno, "failed to read PCI MSIX FLAGS");
-        return -errno;
+        return;
     }
 
     if (pread(fd, &table, sizeof(table),
               vdev->config_offset + pos + PCI_MSIX_TABLE) != sizeof(table)) {
         error_setg_errno(errp, errno, "failed to read PCI MSIX TABLE");
-        return -errno;
+        return;
     }
 
     if (pread(fd, &pba, sizeof(pba),
               vdev->config_offset + pos + PCI_MSIX_PBA) != sizeof(pba)) {
         error_setg_errno(errp, errno, "failed to read PCI MSIX PBA");
-        return -errno;
+        return;
     }
 
     ctrl = le16_to_cpu(ctrl);
@@ -1351,7 +1351,7 @@  static int vfio_msix_early_setup(VFIOPCIDevice *vdev, Error **errp)
             error_setg(errp, "hardware reports invalid configuration, "
                        "MSIX PBA outside of specified BAR");
             g_free(msix);
-            return -EINVAL;
+            return;
         }
     }
 
@@ -1360,8 +1360,6 @@  static int vfio_msix_early_setup(VFIOPCIDevice *vdev, Error **errp)
     vdev->msix = msix;
 
     vfio_pci_fixup_msix_region(vdev);
-
-    return 0;
 }
 
 static int vfio_msix_setup(VFIOPCIDevice *vdev, int pos, Error **errp)
@@ -2519,6 +2517,7 @@  static void vfio_realize(PCIDevice *pdev, Error **errp)
     VFIODevice *vbasedev_iter;
     VFIOGroup *group;
     char *tmp, group_path[PATH_MAX], *group_name;
+    Error *err = NULL;
     ssize_t len;
     struct stat st;
     int groupid;
@@ -2670,8 +2669,9 @@  static void vfio_realize(PCIDevice *pdev, Error **errp)
 
     vfio_pci_size_rom(vdev);
 
-    ret = vfio_msix_early_setup(vdev, errp);
-    if (ret) {
+    vfio_msix_early_setup(vdev, &err);
+    if (err) {
+        error_propagate(errp, err);
         goto error;
     }