[libvirt] [PATCH v2 1/2] conf, qemu: Check for NULL addrs in virDomainUSBAddressRelease

[John Ferlan]

Rather than having the caller check, if the input @addrs is NULL
(e.g. priv->usbaddrs), then just return 0. This also removes the
need for ATTRIBUTE_NONNULL which only really helped if someone
passed a NULL as a parameter not if the passed parameter is NULL.

Signed-off-by: John Ferlan <jferlan at redhat.com>
---
 src/conf/domain_addr.c         |  2 +-
 src/conf/domain_addr.h         |  2 +-
 src/qemu/qemu_domain_address.c |  7 ++-----
 src/qemu/qemu_hotplug.c        | 10 +++-------
 4 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c
index 642268239..a44f96470 100644
--- a/src/conf/domain_addr.c
+++ b/src/conf/domain_addr.c
@@ -2177,7 +2177,7 @@ virDomainUSBAddressRelease(virDomainUSBAddressSetPtr addrs,
     int targetPort;
     int ret = -1;
 
-    if (info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB ||
+    if (!addrs || info->type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB ||
         !virDomainUSBAddressPortIsValid(info->addr.usb.port))
         return 0;
 
diff --git a/src/conf/domain_addr.h b/src/conf/domain_addr.h
index 173101465..7565322bd 100644
--- a/src/conf/domain_addr.h
+++ b/src/conf/domain_addr.h
@@ -330,5 +330,5 @@ virDomainUSBAddressEnsure(virDomainUSBAddressSetPtr addrs,
 int
 virDomainUSBAddressRelease(virDomainUSBAddressSetPtr addrs,
                            virDomainDeviceInfoPtr info)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
+    ATTRIBUTE_NONNULL(2);
 #endif /* __DOMAIN_ADDR_H__ */
diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c
index e28119e4b..613a27ef5 100644
--- a/src/qemu/qemu_domain_address.c
+++ b/src/qemu/qemu_domain_address.c
@@ -2918,11 +2918,8 @@ qemuDomainReleaseDeviceAddress(virDomainObjPtr vm,
     if (virDeviceInfoPCIAddressPresent(info))
         virDomainPCIAddressReleaseAddr(priv->pciaddrs, &info->addr.pci);
 
-    if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_USB &&
-        priv->usbaddrs &&
-        virDomainUSBAddressRelease(priv->usbaddrs, info) < 0)
-        VIR_WARN("Unable to release USB address on %s",
-                 NULLSTR(devstr));
+    if (virDomainUSBAddressRelease(priv->usbaddrs, info) < 0)
+        VIR_WARN("Unable to release USB address on %s", NULLSTR(devstr));
 }
 
 
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index c9868de77..27bda3db1 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -2253,7 +2253,6 @@ qemuDomainAttachHostUSBDevice(virQEMUDriverPtr driver,
 {
     qemuDomainObjPrivatePtr priv = vm->privateData;
     char *devstr = NULL;
-    bool releaseaddr = false;
     bool added = false;
     bool teardowncgroup = false;
     bool teardownlabel = false;
@@ -2262,8 +2261,7 @@ qemuDomainAttachHostUSBDevice(virQEMUDriverPtr driver,
 
     if (priv->usbaddrs) {
         if (virDomainUSBAddressEnsure(priv->usbaddrs, hostdev->info) < 0)
-            goto cleanup;
-        releaseaddr = true;
+            return -1;
     }
 
     if (qemuHostdevPrepareUSBDevices(driver, vm->def->name, &hostdev, 1, 0) < 0)
@@ -2316,8 +2314,7 @@ qemuDomainAttachHostUSBDevice(virQEMUDriverPtr driver,
             VIR_WARN("Unable to remove host device from /dev");
         if (added)
             qemuHostdevReAttachUSBDevices(driver, vm->def->name, &hostdev, 1);
-        if (releaseaddr)
-            virDomainUSBAddressRelease(priv->usbaddrs, hostdev->info);
+        virDomainUSBAddressRelease(priv->usbaddrs, hostdev->info);
     }
     VIR_FREE(devstr);
     return ret;
@@ -3818,8 +3815,7 @@ qemuDomainRemoveDiskDevice(virQEMUDriverPtr driver,
     dev.type = VIR_DOMAIN_DEVICE_DISK;
     dev.data.disk = disk;
     ignore_value(qemuRemoveSharedDevice(driver, &dev, vm->def->name));
-    if (priv->usbaddrs)
-        virDomainUSBAddressRelease(priv->usbaddrs, &disk->info);
+    virDomainUSBAddressRelease(priv->usbaddrs, &disk->info);
 
     virDomainDiskDefFree(disk);
     return 0;
-- 
2.13.6