target/linux/ramips/patches-3.18/064-MIPS-ralink-fix-clearing-the-illegal-access-interrup.patch

   1 From f5d9bea58b576b50cdc0d7a607646b0849ff79c4 Mon Sep 17 00:00:00 2001
   2 From: Jonas Gorski <jogo@openwrt.org>
   3 Date: Mon, 25 May 2015 16:51:34 +0200
   4 Subject: [PATCH] MIPS: ralink: fix clearing the illegal access interrupt
   5
   6 Due to a typo the illegal access interrupt is never cleared in by
   7 the interupt handler, causing an effective deadlock on the first
   8 illegal access.
   9
  10 This was broken since the code was introduced in 5433acd81e87 ("MIPS:
  11 ralink: add illegal access driver"), but only exposed when the Kconfig
  12 symbol was added, thus enabling the code.
  13
  14 Cc: <stable@vger.kernel.org>  [3.18+]
  15 Fixes: a7b7aad383c ("MIPS: ralink: add missing symbol for RALINK_ILL_ACC")
  16 Signed-off-by: Jonas Gorski <jogo@openwrt.org>
  17 ---
  18  arch/mips/ralink/ill_acc.c |    2 +-
  19  1 file changed, 1 insertion(+), 1 deletion(-)
  20
  21 --- a/arch/mips/ralink/ill_acc.c
  22 +++ b/arch/mips/ralink/ill_acc.c
  23 @@ -41,7 +41,7 @@ static irqreturn_t ill_acc_irq_handler(i
  24                 addr, (type >> ILL_ACC_OFF_S) & ILL_ACC_OFF_M,
  25                 type & ILL_ACC_LEN_M);
  26
  27 -       rt_memc_w32(REG_ILL_ACC_TYPE, REG_ILL_ACC_TYPE);
  28 +       rt_memc_w32(ILL_INT_STATUS, REG_ILL_ACC_TYPE);
  29
  30         return IRQ_HANDLED;
  31  }