target/linux/ath79/patches-4.14/0013-MIPS-ath79-fix-system-restart.patch

   1 From 59c7470bc5c4b29ed77d46fc4982f1d85b5cbec1 Mon Sep 17 00:00:00 2001
   2 From: Felix Fietkau <nbd@nbd.name>
   3 Date: Mon, 5 Mar 2018 11:33:54 +0100
   4 Subject: [PATCH 13/33] MIPS: ath79: fix system restart
   5
   6 This patch disables irq on reboot to fix hang issues that were observed
   7 due to pending interrupts.
   8
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 Signed-off-by: John Crispin <john@phrozen.org>
  11 ---
  12  arch/mips/ath79/setup.c                  | 1 +
  13  arch/mips/include/asm/mach-ath79/ath79.h | 1 +
  14  2 files changed, 2 insertions(+)
  15
  16 --- a/arch/mips/ath79/setup.c
  17 +++ b/arch/mips/ath79/setup.c
  18 @@ -40,6 +40,7 @@ static char ath79_sys_type[ATH79_SYS_TYP
  19
  20  static void ath79_restart(char *command)
  21  {
  22 +       local_irq_disable();
  23         ath79_device_reset_set(AR71XX_RESET_FULL_CHIP);
  24         for (;;)
  25                 if (cpu_wait)
  26 --- a/arch/mips/include/asm/mach-ath79/ath79.h
  27 +++ b/arch/mips/include/asm/mach-ath79/ath79.h
  28 @@ -167,6 +167,7 @@ static inline u32 ath79_pll_rr(unsigned
  29  static inline void ath79_reset_wr(unsigned reg, u32 val)
  30  {
  31         __raw_writel(val, ath79_reset_base + reg);
  32 +       (void) __raw_readl(ath79_reset_base + reg); /* flush */
  33  }
  34
  35  static inline u32 ath79_reset_rr(unsigned reg)