Staging: hv: test return value of osd_WaitEventCreate()

The return value of osd_WaitEventCreate() was not examined in some
places.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Cc: Hank Janssen <hjanssen@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/Connection.c

@@ -98,6 +98,11 @@ int VmbusConnect(void)
 	}
 
 	msgInfo->WaitEvent = osd_WaitEventCreate();
+	if (!msgInfo->WaitEvent) {
+		ret = -ENOMEM;
+		goto Cleanup;
+	}
+
 	msg = (struct vmbus_channel_initiate_contact *)msgInfo->Msg;
 
 	msg->Header.MessageType = ChannelMessageInitiateContact;

drivers/staging/hv/NetVsc.c

@@ -749,6 +749,10 @@ static int NetVscOnDeviceAdd(struct hv_device *Device, void *AdditionalInfo)
 			      &netDevice->ReceivePacketList);
 	}
 	netDevice->ChannelInitEvent = osd_WaitEventCreate();
+	if (!netDevice->ChannelInitEvent) {
+		ret = -ENOMEM;
+		goto Cleanup;
+	}
 
 	/* Open the channel */
 	ret = Device->Driver->VmbusChannelInterface.Open(Device,

drivers/staging/hv/StorVsc.c

@@ -199,6 +199,10 @@ static int StorVscChannelInit(struct hv_device *Device)
 	 */
 	memset(request, 0, sizeof(struct storvsc_request_extension));
 	request->WaitEvent = osd_WaitEventCreate();
+	if (!request->WaitEvent) {
+		ret = -ENOMEM;
+		goto nomem;
+	}
 
 	vstorPacket->Operation = VStorOperationBeginInitialization;
 	vstorPacket->Flags = REQUEST_COMPLETION_FLAG;
@@ -338,7 +342,7 @@ static int StorVscChannelInit(struct hv_device *Device)
 Cleanup:
 	kfree(request->WaitEvent);
 	request->WaitEvent = NULL;
-
+nomem:
 	PutStorDevice(Device);
 
 	DPRINT_EXIT(STORVSC);
@@ -649,6 +653,10 @@ int StorVscOnHostReset(struct hv_device *Device)
 	vstorPacket = &request->VStorPacket;
 
 	request->WaitEvent = osd_WaitEventCreate();
+	if (!request->WaitEvent) {
+		ret = -ENOMEM;
+		goto Cleanup;
+	}
 
 	vstorPacket->Operation = VStorOperationResetBus;
 	vstorPacket->Flags = REQUEST_COMPLETION_FLAG;