esx: Refactor esxVI_LookupHostScsiTopologyLunListByTargetName

With a specific combination of compiler options gcc reported the
following bogus warning (I added a context to it to make the issue
visible):

../src/esx/esx_vi.c: In function ‘esxVI_LookupHostScsiTopologyLunListByTargetName’:
../src/esx/esx_vi.c:4674:32: error: potential null pointer dereference [-Werror=null-dereference]
 4671 |     if (!found || !hostScsiTopologyTarget)
 4672 |         goto cleanup;
 4673 |
 4674 |     if (!hostScsiTopologyTarget->lun) {
      |          ~~~~~~~~~~~~~~~~~~~~~~^~~~~

Most likely this is caused by found and hostScsiTopologyTarget doing
essentially the same thing as found is true if and only if
hostScsiTopologyTarget is non-NULL. The found variable is completely
redundant. Removing it would be enough, but I decided to make the code a
little bit easier to read by not using the iterator variable directly.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>

diff --git a/src/esx/esx_vi.c b/src/esx/esx_vi.c
index e2589aa69ad70b103dcf5f2a387b207795ba2e1b..6faf49f27b1c2efd5018ff420ef0d4012a33f1b7 100644 (file)
--- a/src/esx/esx_vi.c
+++ b/src/esx/esx_vi.c
@@ -4616,7 +4616,6 @@ esxVI_LookupHostScsiTopologyLunListByTargetName
     esxVI_HostScsiTopologyInterface *hostScsiInterfaceList = NULL;
     esxVI_HostScsiTopologyInterface *hostScsiInterface = NULL;
     esxVI_HostScsiTopologyTarget *hostScsiTopologyTarget = NULL;
-    bool found = false;
     esxVI_HostInternetScsiTargetTransport *candidate = NULL;
 
     ESX_VI_CHECK_ARG_LIST(hostScsiTopologyLunList);
@@ -4653,22 +4652,20 @@ esxVI_LookupHostScsiTopologyLunListByTargetName
 
     /* See vSphere API documentation about HostScsiTopologyInterface */
     for (hostScsiInterface = hostScsiInterfaceList;
-         hostScsiInterface && !found;
+         hostScsiInterface && !hostScsiTopologyTarget;
          hostScsiInterface = hostScsiInterface->_next) {
-        for (hostScsiTopologyTarget = hostScsiInterface->target;
-             hostScsiTopologyTarget;
-             hostScsiTopologyTarget = hostScsiTopologyTarget->_next) {
-            candidate = esxVI_HostInternetScsiTargetTransport_DynamicCast
-                          (hostScsiTopologyTarget->transport);
+        esxVI_HostScsiTopologyTarget *target;
+        for (target = hostScsiInterface->target; target; target = target->_next) {
+            candidate = esxVI_HostInternetScsiTargetTransport_DynamicCast(target->transport);
 
             if (candidate && STREQ(candidate->iScsiName, name)) {
-                found = true;
+                hostScsiTopologyTarget = target;
                 break;
             }
         }
     }
 
-    if (!found || !hostScsiTopologyTarget)
+    if (!hostScsiTopologyTarget)
         goto cleanup;
 
     if (!hostScsiTopologyTarget->lun) {