From ea75a716955e85ad076dd2861ca9e41def406a1b Mon Sep 17 00:00:00 2001
From: Doug Berger <opendmb@gmail.com>
Date: Mon, 13 May 2019 20:59:45 +0200
Subject: [PATCH] tty: amba-pl011: allow shared interrupt

The PL011 register space includes all necessary status bits to
determine whether a device instance requires handling in response
to an interrupt. Therefore, multiple instances of the device could
be serviced by a single shared interrupt, which is the case on BCM7211.

Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/tty/serial/amba-pl011.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -1733,7 +1733,8 @@ static int pl011_allocate_irq(struct uar
 {
 	pl011_write(uap->im, uap, REG_IMSC);
 
-	return request_irq(uap->port.irq, pl011_int, 0, "uart-pl011", uap);
+	return request_irq(uap->port.irq, pl011_int, IRQF_SHARED, "uart-pl011",
+			   uap);
 }
 
 /*
