[PATCH v4 09/17] hw/pci/pci_bridge: Omit errp for pci_add_capability

[Akihiko Odaki]

Omitting errp for pci_add_capability() causes it to abort if
capabilities overlap. A caller of pci_bridge_ssvid_init(), which calls
pci_add_capability() in turn, is expected to ensure that will not
happen.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
 hw/pci-bridge/i82801b11.c          | 14 ++------------
 hw/pci-bridge/pcie_root_port.c     |  7 +------
 hw/pci-bridge/xio3130_downstream.c |  8 ++------
 hw/pci-bridge/xio3130_upstream.c   |  8 ++------
 hw/pci/pci_bridge.c                | 21 ++++++---------------
 include/hw/pci/pci_bridge.h        |  5 ++---
 6 files changed, 15 insertions(+), 48 deletions(-)

diff --git a/hw/pci-bridge/i82801b11.c b/hw/pci-bridge/i82801b11.c
index f28181e210..f45dcdbacc 100644
--- a/hw/pci-bridge/i82801b11.c
+++ b/hw/pci-bridge/i82801b11.c
@@ -61,21 +61,11 @@ typedef struct I82801b11Bridge {
 
 static void i82801b11_bridge_realize(PCIDevice *d, Error **errp)
 {
-    int rc;
-
     pci_bridge_initfn(d, TYPE_PCI_BUS);
 
-    rc = pci_bridge_ssvid_init(d, I82801ba_SSVID_OFFSET,
-                               I82801ba_SSVID_SVID, I82801ba_SSVID_SSID,
-                               errp);
-    if (rc < 0) {
-        goto err_bridge;
-    }
+    pci_bridge_ssvid_init(d, I82801ba_SSVID_OFFSET,
+                          I82801ba_SSVID_SVID, I82801ba_SSVID_SSID);
     pci_config_set_prog_interface(d->config, PCI_CLASS_BRIDGE_PCI_INF_SUB);
-    return;
-
-err_bridge:
-    pci_bridge_exitfn(d);
 }
 
 static const VMStateDescription i82801b11_bridge_dev_vmstate = {
diff --git a/hw/pci-bridge/pcie_root_port.c b/hw/pci-bridge/pcie_root_port.c
index 460e48269d..a9d8c2adb4 100644
--- a/hw/pci-bridge/pcie_root_port.c
+++ b/hw/pci-bridge/pcie_root_port.c
@@ -74,12 +74,7 @@ static void rp_realize(PCIDevice *d, Error **errp)
     }
     pcie_port_init_reg(d);
 
-    rc = pci_bridge_ssvid_init(d, rpc->ssvid_offset, dc->vendor_id,
-                               rpc->ssid, errp);
-    if (rc < 0) {
-        error_append_hint(errp, "Can't init SSV ID, error %d\n", rc);
-        goto err_bridge;
-    }
+    pci_bridge_ssvid_init(d, rpc->ssvid_offset, dc->vendor_id, rpc->ssid);
 
     if (rpc->interrupts_init) {
         rc = rpc->interrupts_init(d, errp);
diff --git a/hw/pci-bridge/xio3130_downstream.c 
b/hw/pci-bridge/xio3130_downstream.c
index 05e2b06c0c..eea3d3a2df 100644
--- a/hw/pci-bridge/xio3130_downstream.c
+++ b/hw/pci-bridge/xio3130_downstream.c
@@ -81,12 +81,8 @@ static void xio3130_downstream_realize(PCIDevice *d, Error 
**errp)
         goto err_bridge;
     }
 
-    rc = pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
-                               XIO3130_SSVID_SVID, XIO3130_SSVID_SSID,
-                               errp);
-    if (rc < 0) {
-        goto err_msi;
-    }
+    pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
+                          XIO3130_SSVID_SVID, XIO3130_SSVID_SSID);
 
     rc = pcie_cap_init(d, XIO3130_EXP_OFFSET, PCI_EXP_TYPE_DOWNSTREAM,
                        p->port, errp);
diff --git a/hw/pci-bridge/xio3130_upstream.c b/hw/pci-bridge/xio3130_upstream.c
index 5ff46ef050..d954906d79 100644
--- a/hw/pci-bridge/xio3130_upstream.c
+++ b/hw/pci-bridge/xio3130_upstream.c
@@ -71,12 +71,8 @@ static void xio3130_upstream_realize(PCIDevice *d, Error 
**errp)
         goto err_bridge;
     }
 
-    rc = pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
-                               XIO3130_SSVID_SVID, XIO3130_SSVID_SSID,
-                               errp);
-    if (rc < 0) {
-        goto err_msi;
-    }
+    pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
+                          XIO3130_SSVID_SVID, XIO3130_SSVID_SSID);
 
     rc = pcie_cap_init(d, XIO3130_EXP_OFFSET, PCI_EXP_TYPE_UPSTREAM,
                        p->port, errp);
diff --git a/hw/pci/pci_bridge.c b/hw/pci/pci_bridge.c
index da34c8ebcd..30032fed64 100644
--- a/hw/pci/pci_bridge.c
+++ b/hw/pci/pci_bridge.c
@@ -42,21 +42,15 @@
 #define PCI_SSVID_SVID          4
 #define PCI_SSVID_SSID          6
 
-int pci_bridge_ssvid_init(PCIDevice *dev, uint8_t offset,
-                          uint16_t svid, uint16_t ssid,
-                          Error **errp)
+void pci_bridge_ssvid_init(PCIDevice *dev, uint8_t offset,
+                           uint16_t svid, uint16_t ssid)
 {
-    int pos;
+    uint8_t pos;
 
-    pos = pci_add_capability(dev, PCI_CAP_ID_SSVID, offset,
-                             PCI_SSVID_SIZEOF, errp);
-    if (pos < 0) {
-        return pos;
-    }
+    pos = pci_add_capability(dev, PCI_CAP_ID_SSVID, offset, PCI_SSVID_SIZEOF);
 
     pci_set_word(dev->config + pos + PCI_SSVID_SVID, svid);
     pci_set_word(dev->config + pos + PCI_SSVID_SSID, ssid);
-    return pos;
 }
 
 /* Accessor function to get parent bridge device from pci bus. */
@@ -455,11 +449,8 @@ int pci_bridge_qemu_reserve_cap_init(PCIDevice *dev, int 
cap_offset,
             .mem_pref_64 = cpu_to_le64(res_reserve.mem_pref_64)
     };
 
-    int offset = pci_add_capability(dev, PCI_CAP_ID_VNDR,
-                                    cap_offset, cap_len, errp);
-    if (offset < 0) {
-        return offset;
-    }
+    uint8_t offset = pci_add_capability(dev, PCI_CAP_ID_VNDR,
+                                        cap_offset, cap_len);
 
     memcpy(dev->config + offset + PCI_CAP_FLAGS,
            (char *)&cap + PCI_CAP_FLAGS,
diff --git a/include/hw/pci/pci_bridge.h b/include/hw/pci/pci_bridge.h
index ba4bafac7c..e499482972 100644
--- a/include/hw/pci/pci_bridge.h
+++ b/include/hw/pci/pci_bridge.h
@@ -101,9 +101,8 @@ typedef struct PXBDev PXBDev;
 DECLARE_INSTANCE_CHECKER(PXBDev, PXB_CXL_DEV,
                          TYPE_PXB_CXL_DEVICE)
 
-int pci_bridge_ssvid_init(PCIDevice *dev, uint8_t offset,
-                          uint16_t svid, uint16_t ssid,
-                          Error **errp);
+void pci_bridge_ssvid_init(PCIDevice *dev, uint8_t offset,
+                           uint16_t svid, uint16_t ssid);
 
 PCIDevice *pci_bridge_get_device(PCIBus *bus);
 PCIBus *pci_bridge_get_sec_bus(PCIBridge *br);
-- 
2.37.3