mailbox: omap: Move fifo size check to point of use

The mbox_kfifo_size can be changed at runtime, the sanity
check on it's value should be done when it is used, not
only once at init time.
Signed-off-by: Andrew Davis <afd@ti.com>
Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>

drivers/mailbox/omap-mailbox.c

@@ -310,6 +310,7 @@ static struct omap_mbox_queue *mbox_queue_alloc(struct omap_mbox *mbox,
 					void (*work)(struct work_struct *))
 {
 	struct omap_mbox_queue *mq;
+	unsigned int size;
 
 	if (!work)
 		return NULL;
@@ -320,7 +321,10 @@ static struct omap_mbox_queue *mbox_queue_alloc(struct omap_mbox *mbox,
 
 	spin_lock_init(&mq->lock);
 
-	if (kfifo_alloc(&mq->fifo, mbox_kfifo_size, GFP_KERNEL))
+	/* kfifo size sanity check: alignment and minimal size */
+	size = ALIGN(mbox_kfifo_size, sizeof(u32));
+	size = max_t(unsigned int, size, sizeof(u32));
+	if (kfifo_alloc(&mq->fifo, size, GFP_KERNEL))
 		goto error;
 
 	INIT_WORK(&mq->work, work);
@@ -838,10 +842,6 @@ static int __init omap_mbox_init(void)
 	if (err)
 		return err;
 
-	/* kfifo size sanity check: alignment and minimal size */
-	mbox_kfifo_size = ALIGN(mbox_kfifo_size, sizeof(u32));
-	mbox_kfifo_size = max_t(unsigned int, mbox_kfifo_size, sizeof(u32));
-
 	err = platform_driver_register(&omap_mbox_driver);
 	if (err)
 		class_unregister(&omap_mbox_class);