[PATCH 17/20] qemu_process: Document and cleanup qemuProcessQMPNew

[Jiri Denemark <jdenemar@xxxxxxxxxx>]

From: Chris Venteicher <cventeic@xxxxxxxxxx>

qemuProcessQMPNew is one of the public functions used to create and
manage a QEMU process for QMP command exchanges outside of domain
operations.

Add descriptive comment block, debug statement and make source
consistent with the cleanup / VIR_STEAL_PTR format used elsewhere.

Signed-off-by: Chris Venteicher <cventeic@xxxxxxxxxx>
Reviewed-by: Jiri Denemark <jdenemar@xxxxxxxxxx>
Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx>
---

Notes:
    Version 7:
    - just a few small tweaks, mainly in the commit message and comments

 src/qemu/qemu_process.c | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 79896b6232..b5d127b7d3 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -8341,6 +8341,17 @@ qemuProcessQMPFree(qemuProcessQMPPtr proc)
 }
 
 
+/**
+ * qemuProcessQMPNew:
+ * @binary: QEMU binary
+ * @libDir: Directory for process and connection artifacts
+ * @runUid: UserId for QEMU process
+ * @runGid: GroupId for QEMU process
+ * @forceTCG: Force TCG mode if true
+ *
+ * Allocate and initialize domain structure encapsulating QEMU process state
+ * and monitor connection for completing QMP queries.
+ */
 qemuProcessQMPPtr
 qemuProcessQMPNew(const char *binary,
                   const char *libDir,
@@ -8348,24 +8359,28 @@ qemuProcessQMPNew(const char *binary,
                   gid_t runGid,
                   bool forceTCG)
 {
+    qemuProcessQMPPtr ret = NULL;
     qemuProcessQMPPtr proc = NULL;
 
+    VIR_DEBUG("exec=%s, libDir=%s, runUid=%u, runGid=%u, forceTCG=%d",
+              binary, libDir, runUid, runGid, forceTCG);
+
     if (VIR_ALLOC(proc) < 0)
-        goto error;
+        goto cleanup;
 
     if (VIR_STRDUP(proc->binary, binary) < 0 ||
         VIR_STRDUP(proc->libDir, libDir) < 0)
-        goto error;
+        goto cleanup;
 
     proc->runUid = runUid;
     proc->runGid = runGid;
     proc->forceTCG = forceTCG;
 
-    return proc;
+    VIR_STEAL_PTR(ret, proc);
 
- error:
+ cleanup:
     qemuProcessQMPFree(proc);
-    return NULL;
+    return ret;
 }
 
 
-- 
2.20.1