[libvirt] [PATCH] storage: Fix bug of fs pool destroying

[Osier Yang]

Regression introduced by commit 258e06c85b7, "ret" could be set to 1
or 0 by virStorageBackendFileSystemIsMounted before goto cleanup.
This could mislead the callers (up to the public API
virStoragePoolDestroy) to return success even the underlying umount
command fails.
---
 src/storage/storage_backend_fs.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/storage/storage_backend_fs.c b/src/storage/storage_backend_fs.c
index 10daee3..cbcbe34 100644
--- a/src/storage/storage_backend_fs.c
+++ b/src/storage/storage_backend_fs.c
@@ -449,6 +449,7 @@ static int
 virStorageBackendFileSystemUnmount(virStoragePoolObjPtr pool) {
     virCommandPtr cmd = NULL;
     int ret = -1;
+    int rc;
 
     if (pool->def->type == VIR_STORAGE_POOL_NETFS) {
         if (pool->def->source.nhost != 1) {
@@ -475,8 +476,8 @@ virStorageBackendFileSystemUnmount(virStoragePoolObjPtr pool) {
     }
 
     /* Short-circuit if already unmounted */
-    if ((ret = virStorageBackendFileSystemIsMounted(pool)) != 1) {
-        if (ret < 0)
+    if ((rc = virStorageBackendFileSystemIsMounted(pool)) != 1) {
+        if (rc < 0)
             return -1;
         else
             return 0;
-- 
1.7.7.6