[pfcwd]: delete pfcwd handler only when it exists (sonic-net#442)

sihuihan88 · web-flow · commit 6b2a5910ee07 · 2018-02-02T15:17:47.000-08:00
Signed-off-by: Sihui Han &lt;sihan@microsoft.com&gt;
diff --git a/orchagent/pfcwdorch.cpp b/orchagent/pfcwdorch.cpp
@@ -626,8 +626,11 @@ void PfcWdSwOrch<DropHandler, ForwardHandler>::doTask(swss::NotificationConsumer
     }
     else if (event == "restore")
     {
-        entry->second.handler->commitCounters();
-        entry->second.handler = nullptr;
+        if (entry->second.handler != nullptr)
+        {
+            entry->second.handler->commitCounters();
+            entry->second.handler = nullptr;
+        }
     }
     else
     {

Original file line number	Diff line number	Diff line change
`@@ -626,8 +626,11 @@ void PfcWdSwOrch<DropHandler, ForwardHandler>::doTask(swss::NotificationConsumer`
`626`	`626`	`}`
`627`	`627`	`else if (event == "restore")`
`628`	`628`	`{`
`629`		`- entry->second.handler->commitCounters();`
`630`		`- entry->second.handler = nullptr;`
	`629`	`+ if (entry->second.handler != nullptr)`
	`630`	`+ {`
	`631`	`+ entry->second.handler->commitCounters();`
	`632`	`+ entry->second.handler = nullptr;`
	`633`	`+ }`
`631`	`634`	`}`
`632`	`635`	`else`
`633`	`636`	`{`