target/linux/brcm2708/patches-4.19/950-0101-ARM-Activate-FIQs-to-avoid-__irq_startup-warnings.patch

   1 From ffa437377a6121234cd85d3bd2a8d8c43f0bedd5 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Mon, 11 Dec 2017 09:18:32 +0000
   4 Subject: [PATCH] ARM: Activate FIQs to avoid __irq_startup warnings
   5
   6 There is a new test in __irq_startup that the IRQ is activated, which
   7 hasn't been the case for FIQs since they bypass some of the usual setup.
   8
   9 Augment enable_fiq to include a call to irq_activate to avoid the
  10 warning.
  11
  12 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  13 ---
  14  arch/arm/kernel/fiq.c | 4 ++++
  15  1 file changed, 4 insertions(+)
  16
  17 --- a/arch/arm/kernel/fiq.c
  18 +++ b/arch/arm/kernel/fiq.c
  19 @@ -56,6 +56,8 @@
  20  static unsigned long dfl_fiq_insn;
  21  static struct pt_regs dfl_fiq_regs;
  22
  23 +extern int irq_activate(struct irq_desc *desc);
  24 +
  25  /* Default reacquire function
  26   * - we always relinquish FIQ control
  27   * - we always reacquire FIQ control
  28 @@ -140,6 +142,8 @@ static int fiq_start;
  29
  30  void enable_fiq(int fiq)
  31  {
  32 +       struct irq_desc *desc = irq_to_desc(fiq + fiq_start);
  33 +       irq_activate(desc);
  34         enable_irq(fiq + fiq_start);
  35  }
  36