[PATCH v3 3/5] Reduce number of parameters to qemuDomainPCIAddressSetCreate

[Tomasz Flendrich <t.flendrich@xxxxxxxxx>]

We can as well generate the number of buses inside that function. Fewer
parameters will be useful when recalculating the pci address set on
demand.
---
 src/qemu/qemu_domain_address.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c
index f916df2..ade4b64 100644
--- a/src/qemu/qemu_domain_address.c
+++ b/src/qemu/qemu_domain_address.c
@@ -924,14 +924,24 @@ qemuDomainValidateDevicePCISlotsChipsets(virDomainDefPtr def,
 
 static virDomainPCIAddressSetPtr
 qemuDomainPCIAddressSetCreate(virDomainDefPtr def,
-                              unsigned int nbuses,
                               virQEMUCapsPtr qemuCaps,
                               bool dryRun,
                               bool assign)
 {
     virDomainPCIAddressSetPtr addrs;
+    int max_idx = -1;
+    int nbuses = 0;
     size_t i;
 
+    for (i = 0; i < def->ncontrollers; i++) {
+        if (def->controllers[i]->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI) {
+            if ((int) def->controllers[i]->idx > max_idx)
+                max_idx = def->controllers[i]->idx;
+        }
+    }
+
+    nbuses = max_idx + 1;
+
     if ((addrs = virDomainPCIAddressSetAlloc(nbuses)) == NULL)
         return NULL;
 
@@ -1500,7 +1510,7 @@ qemuDomainAssignPCIAddresses(virDomainDefPtr def,
         virDomainDeviceInfo info;
 
         /* 1st pass to figure out how many PCI bridges we need */
-        if (!(addrs = qemuDomainPCIAddressSetCreate(def, nbuses, qemuCaps,
+        if (!(addrs = qemuDomainPCIAddressSetCreate(def, qemuCaps,
                                                     true, true)))
             goto cleanup;
 
@@ -1537,7 +1547,6 @@ qemuDomainAssignPCIAddresses(virDomainDefPtr def,
                 virDomainPCIAddressReserveNextSlot(addrs, &info, flags) < 0)
                 goto cleanup;
         }
-        nbuses = addrs->nbuses;
         virDomainPCIAddressSetFree(addrs);
         addrs = NULL;
 
@@ -1549,7 +1558,7 @@ qemuDomainAssignPCIAddresses(virDomainDefPtr def,
     }
 
     if (qemuDomainSupportsPCI(def, qemuCaps)) {
-        if (!(addrs = qemuDomainPCIAddressSetCreate(def, nbuses, qemuCaps,
+        if (!(addrs = qemuDomainPCIAddressSetCreate(def, qemuCaps,
                                                     false, true)))
             goto cleanup;
 
-- 
1.9.1

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