target/linux/brcm2708/patches-4.19/950-0519-tty-amba-pl011-allow-shared-interrupt.patch

   1 From ea75a716955e85ad076dd2861ca9e41def406a1b Mon Sep 17 00:00:00 2001
   2 From: Doug Berger <opendmb@gmail.com>
   3 Date: Mon, 13 May 2019 20:59:45 +0200
   4 Subject: [PATCH 519/806] tty: amba-pl011: allow shared interrupt
   5
   6 The PL011 register space includes all necessary status bits to
   7 determine whether a device instance requires handling in response
   8 to an interrupt. Therefore, multiple instances of the device could
   9 be serviced by a single shared interrupt, which is the case on BCM7211.
  10
  11 Signed-off-by: Doug Berger <opendmb@gmail.com>
  12 Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
  13 ---
  14  drivers/tty/serial/amba-pl011.c | 3 ++-
  15  1 file changed, 2 insertions(+), 1 deletion(-)
  16
  17 --- a/drivers/tty/serial/amba-pl011.c
  18 +++ b/drivers/tty/serial/amba-pl011.c
  19 @@ -1733,7 +1733,8 @@ static int pl011_allocate_irq(struct uar
  20  {
  21         pl011_write(uap->im, uap, REG_IMSC);
  22
  23 -       return request_irq(uap->port.irq, pl011_int, 0, "uart-pl011", uap);
  24 +       return request_irq(uap->port.irq, pl011_int, IRQF_SHARED, "uart-pl011",
  25 +                          uap);
  26  }
  27
  28  /*