misc: ibmasm: Return error on error path

If ibmasm_event_buffer_init() or ibmasm_heartbeat_init() fails,
then ibmasm_init_one() release all resources and return 0 on error path.

The patch adds corresponding error for fails.

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: NAnton Vasilyev <vasilyev@ispras.ru>
Reviewed-by: NAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

drivers/misc/ibmasm/event.c

@@ -155,7 +155,7 @@ int ibmasm_event_buffer_init(struct service_processor *sp)
 
 	buffer = kmalloc(sizeof(struct event_buffer), GFP_KERNEL);
 	if (!buffer)
-		return 1;
+		return -ENOMEM;
 
 	buffer->next_index = 0;
 	buffer->next_serial_number = 1;

drivers/misc/ibmasm/module.c

@@ -94,12 +94,14 @@ static int ibmasm_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	snprintf(sp->dirname, IBMASM_NAME_SIZE, "%d", sp->number);
 	snprintf(sp->devname, IBMASM_NAME_SIZE, "%s%d", DRIVER_NAME, sp->number);
 
-	if (ibmasm_event_buffer_init(sp)) {
+	result = ibmasm_event_buffer_init(sp);
+	if (result) {
 		dev_err(sp->dev, "Failed to allocate event buffer\n");
 		goto error_eventbuffer;
 	}
 
-	if (ibmasm_heartbeat_init(sp)) {
+	result = ibmasm_heartbeat_init(sp);
+	if (result) {
 		dev_err(sp->dev, "Failed to allocate heartbeat command\n");
 		goto error_heartbeat;
 	}