[PATCH 11/19] virhash: Make sure that hash key is always copied

[Peter Krempa <pkrempa@xxxxxxxxxx>]

Fix all implementations of virHashKeyCopy to always return a valid
pointer.

Tweak the return value expectation comment so that it doesn't
necessarily require to allocate memory.

Signed-off-by: Peter Krempa <pkrempa@xxxxxxxxxx>
---
 src/conf/domain_addr.c | 5 +----
 src/util/virhash.c     | 4 +---
 src/util/virhash.h     | 3 ++-
 3 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c
index f07b3d9725..e0be655772 100644
--- a/src/conf/domain_addr.c
+++ b/src/conf/domain_addr.c
@@ -997,10 +997,7 @@ virZPCIAddrKeyEqual(const void *namea,
 static void *
 virZPCIAddrKeyCopy(const void *name)
 {
-    unsigned int *copy;
-
-    if (VIR_ALLOC(copy) < 0)
-        return NULL;
+    unsigned int *copy = g_new0(unsigned int, 1);

     *copy = *((unsigned int *)name);
     return (void *)copy;
diff --git a/src/util/virhash.c b/src/util/virhash.c
index d5c5e017a1..c57d9f8292 100644
--- a/src/util/virhash.c
+++ b/src/util/virhash.c
@@ -94,9 +94,7 @@ static bool virHashStrEqual(const void *namea, const void *nameb)

 static void *virHashStrCopy(const void *name)
 {
-    char *ret;
-    ret = g_strdup(name);
-    return ret;
+    return g_strdup(name);
 }


diff --git a/src/util/virhash.h b/src/util/virhash.h
index 08f99d8a3d..143ce52206 100644
--- a/src/util/virhash.h
+++ b/src/util/virhash.h
@@ -83,7 +83,8 @@ typedef bool (*virHashKeyEqual)(const void *namea, const void *nameb);
  * Create a copy of the hash key, duplicating
  * memory allocation where applicable
  *
- * Returns a newly allocated copy of @name
+ * Returns a copy of @name which will eventually be passed to the
+ * 'virHashKeyFree' callback at the end of it's lifetime.
  */
 typedef void *(*virHashKeyCopy)(const void *name);
 /**
-- 
2.24.1