[libvirt PATCH 4/5] virNWFilterDriverState: Destroy mutex safely

[Tim Wiederhake <twiederh@xxxxxxxxxx>]

Allow nwfilterStateCleanupLocked to be called on a partially constructed
driver object.

This enables the next patch to simplify and fix error handling in
nwfilterStateInitialize.

Signed-off-by: Tim Wiederhake <twiederh@xxxxxxxxxx>
---
 src/conf/virnwfilterobj.h      | 1 +
 src/nwfilter/nwfilter_driver.c | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/conf/virnwfilterobj.h b/src/conf/virnwfilterobj.h
index cb103280e8..b67dc017c5 100644
--- a/src/conf/virnwfilterobj.h
+++ b/src/conf/virnwfilterobj.h
@@ -45,6 +45,7 @@ struct _virNWFilterDriverState {
 
     /* Recursive. Hold for filter changes, instantiation or deletion */
     virMutex updateLock;
+    bool updateLockInitialized;
 };
 
 virNWFilterDef *
diff --git a/src/nwfilter/nwfilter_driver.c b/src/nwfilter/nwfilter_driver.c
index f89b5b8757..bf17c5ea66 100644
--- a/src/nwfilter/nwfilter_driver.c
+++ b/src/nwfilter/nwfilter_driver.c
@@ -173,7 +173,8 @@ nwfilterStateCleanupLocked(void)
     /* free inactive nwfilters */
     virNWFilterObjListFree(driver->nwfilters);
 
-    virMutexDestroy(&driver->updateLock);
+    if (driver->updateLockInitialized)
+        virMutexDestroy(&driver->updateLock);
     g_clear_pointer(&driver, g_free);
 
     return 0;
@@ -222,6 +223,7 @@ nwfilterStateInitialize(bool privileged,
     if (virMutexInitRecursive(&driver->updateLock) < 0)
         goto err_free_driverstate;
 
+    driver->updateLockInitialized = true;
     driver->privileged = privileged;
 
     if (!(driver->nwfilters = virNWFilterObjListNew()))
-- 
2.31.1