mailbox: omap: Fix mailbox interrupt sharing

Multiple mailbox users can share one interrupt line. This flag was
mistakenly dropped as part of the FIFO removal. Mark the IRQ as shared.

Reported-by: Beleswar Padhi <[email protected]>
Fixes: 3f58c1f ("mailbox: omap: Remove kernel FIFO message queuing")
Signed-off-by: Andrew Davis <[email protected]>
Tested-by: Beleswar Padhi <[email protected]>
Signed-off-by: Jassi Brar <[email protected]>

Author: glneo

drivers/mailbox/omap-mailbox.c

@@ -230,7 +230,8 @@ static int omap_mbox_startup(struct omap_mbox *mbox)
 	int ret = 0;
 
 	ret = request_threaded_irq(mbox->irq, NULL, mbox_interrupt,
-				   IRQF_ONESHOT, mbox->name, mbox);
+				   IRQF_SHARED | IRQF_ONESHOT, mbox->name,
+				   mbox);
 	if (unlikely(ret)) {
 		pr_err("failed to register mailbox interrupt:%d\n", ret);
 		return ret;