package/kernel/lantiq/vrx518_ep/patches/200-fix-irq-masking.patch

   1 Fix double negation of bitmask in dc_ep_icu_disable andwr32_mask.
   2 Also add locking to ensure the masking is applied atomically.
   3
   4 --- a/misc.c
   5 +++ b/misc.c
   6 @@ -68,12 +68,22 @@ void dc_ep_icu_disable(struct dc_ep_priv
   7
   8  void dc_ep_icu_dis_intr(struct dc_ep_priv *priv, u32 bits)
   9  {
  10 -       wr32_mask(~bits, 0, ICU_IMER);
  11 +       struct dc_aca *aca = to_aca(priv);
  12 +       unsigned long flags;
  13 +
  14 +       spin_lock_irqsave(&aca->icu_lock, flags);
  15 +       wr32_mask(bits, 0, ICU_IMER);
  16 +       spin_unlock_irqrestore(&aca->icu_lock, flags);
  17  }
  18
  19  void dc_ep_icu_en_intr(struct dc_ep_priv *priv, u32 bits)
  20  {
  21 +       struct dc_aca *aca = to_aca(priv);
  22 +       unsigned long flags;
  23 +
  24 +       spin_lock_irqsave(&aca->icu_lock, flags);
  25         wr32_mask(0, bits, ICU_IMER);
  26 +       spin_unlock_irqrestore(&aca->icu_lock, flags);
  27  }
  28
  29  void dc_ep_assert_device(struct dc_ep_priv *priv, u32 bits)
  30 --- a/aca.c
  31 +++ b/aca.c
  32 @@ -1158,6 +1158,7 @@ void dc_aca_info_init(struct dc_ep_priv
  33         struct dc_aca *aca = to_aca(priv);
  34
  35         aca->initialized = false;
  36 +       spin_lock_init(&aca->icu_lock);
  37         spin_lock_init(&aca->clk_lock);
  38         spin_lock_init(&aca->rcu_lock);
  39         mutex_init(&aca->pin_lock);
  40 --- a/aca.h
  41 +++ b/aca.h
  42 @@ -470,6 +470,7 @@ struct aca_hif_params {
  43
  44  struct dc_aca {
  45         bool initialized;
  46 +       spinlock_t      icu_lock;
  47         spinlock_t      clk_lock;
  48         spinlock_t      rcu_lock;
  49         struct mutex    pin_lock;