[Qemu-devel] [PATCH 08/16] pci-assign: accept Error from pci_add_capability2()

[Laszlo Ersek <lersek@redhat.com>]

Propagate any errors while adding PCI capabilities to
assigned_device_pci_cap_init(). We'll continue the propagation upwards
when assigned_device_pci_cap_init() becomes a leaf itself (when none of
its callees will report errors internally any longer when detecting and
returning them).

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
---
 hw/i386/kvm/pci-assign.c | 35 ++++++++++++++++++++++++++++-------
 1 file changed, 28 insertions(+), 7 deletions(-)

diff --git a/hw/i386/kvm/pci-assign.c b/hw/i386/kvm/pci-assign.c
index b4696aa..f91d4fb 100644
--- a/hw/i386/kvm/pci-assign.c
+++ b/hw/i386/kvm/pci-assign.c
@@ -1261,12 +1261,15 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev)
             error_free(local_err);
             return -ENOTSUP;
         }
         dev->cap.available |= ASSIGNED_DEVICE_CAP_MSI;
         /* Only 32-bit/no-mask currently supported */
-        ret = pci_add_capability(pci_dev, PCI_CAP_ID_MSI, pos, 10);
+        ret = pci_add_capability2(pci_dev, PCI_CAP_ID_MSI, pos, 10,
+                                  &local_err);
         if (ret < 0) {
+            error_report("%s", error_get_pretty(local_err));
+            error_free(local_err);
             return ret;
         }
         pci_dev->msi_cap = pos;
 
         pci_set_word(pci_dev->config + pos + PCI_MSI_FLAGS,
@@ -1292,12 +1295,15 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev)
             error_report("%s", error_get_pretty(local_err));
             error_free(local_err);
             return -ENOTSUP;
         }
         dev->cap.available |= ASSIGNED_DEVICE_CAP_MSIX;
-        ret = pci_add_capability(pci_dev, PCI_CAP_ID_MSIX, pos, 12);
+        ret = pci_add_capability2(pci_dev, PCI_CAP_ID_MSIX, pos, 12,
+                                  &local_err);
         if (ret < 0) {
+            error_report("%s", error_get_pretty(local_err));
+            error_free(local_err);
             return ret;
         }
         pci_dev->msix_cap = pos;
 
         pci_set_word(pci_dev->config + pos + PCI_MSIX_FLAGS,
@@ -1320,12 +1326,15 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev)
     /* Minimal PM support, nothing writable, device appears to NAK changes */
     pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_PM, 0);
     if (pos) {
         uint16_t pmc;
 
-        ret = pci_add_capability(pci_dev, PCI_CAP_ID_PM, pos, PCI_PM_SIZEOF);
+        ret = pci_add_capability2(pci_dev, PCI_CAP_ID_PM, pos, PCI_PM_SIZEOF,
+                                  &local_err);
         if (ret < 0) {
+            error_report("%s", error_get_pretty(local_err));
+            error_free(local_err);
             return ret;
         }
 
         assigned_dev_setup_cap_read(dev, pos, PCI_PM_SIZEOF);
 
@@ -1386,12 +1395,15 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev)
             error_report("%s: Unsupported PCI express capability version %d",
                          __func__, version);
             return -EINVAL;
         }
 
-        ret = pci_add_capability(pci_dev, PCI_CAP_ID_EXP, pos, size);
+        ret = pci_add_capability2(pci_dev, PCI_CAP_ID_EXP, pos, size,
+                                  &local_err);
         if (ret < 0) {
+            error_report("%s", error_get_pretty(local_err));
+            error_free(local_err);
             return ret;
         }
 
         assigned_dev_setup_cap_read(dev, pos, size);
 
@@ -1460,12 +1472,15 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev)
     if (pos) {
         uint16_t cmd;
         uint32_t status;
 
         /* Only expose the minimum, 8 byte capability */
-        ret = pci_add_capability(pci_dev, PCI_CAP_ID_PCIX, pos, 8);
+        ret = pci_add_capability2(pci_dev, PCI_CAP_ID_PCIX, pos, 8,
+                                  &local_err);
         if (ret < 0) {
+            error_report("%s", error_get_pretty(local_err));
+            error_free(local_err);
             return ret;
         }
 
         assigned_dev_setup_cap_read(dev, pos, 8);
 
@@ -1486,12 +1501,15 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev)
     }
 
     pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_VPD, 0);
     if (pos) {
         /* Direct R/W passthrough */
-        ret = pci_add_capability(pci_dev, PCI_CAP_ID_VPD, pos, 8);
+        ret = pci_add_capability2(pci_dev, PCI_CAP_ID_VPD, pos, 8,
+                                  &local_err);
         if (ret < 0) {
+            error_report("%s", error_get_pretty(local_err));
+            error_free(local_err);
             return ret;
         }
 
         assigned_dev_setup_cap_read(dev, pos, 8);
 
@@ -1502,12 +1520,15 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev)
     /* Devices can have multiple vendor capabilities, get them all */
     for (pos = 0; (pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_VNDR, pos));
         pos += PCI_CAP_LIST_NEXT) {
         uint8_t len = pci_get_byte(pci_dev->config + pos + PCI_CAP_FLAGS);
         /* Direct R/W passthrough */
-        ret = pci_add_capability(pci_dev, PCI_CAP_ID_VNDR, pos, len);
+        ret = pci_add_capability2(pci_dev, PCI_CAP_ID_VNDR, pos, len,
+                                  &local_err);
         if (ret < 0) {
+            error_report("%s", error_get_pretty(local_err));
+            error_free(local_err);
             return ret;
         }
 
         assigned_dev_setup_cap_read(dev, pos, len);
 
-- 
1.8.3.1