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ramips: fix hang on boot on rt305x

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Fix an upstream regression on 3.18+ that causes rt305x based devices
to hang on boot.

Fixes #19715.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 45747
This commit is contained in:
Jonas Gorski 2015-05-25 18:02:32 +00:00
parent 497fdc3f09
commit caea19a3e0
1 changed files with 31 additions and 0 deletions
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31
target/linux/ramips/patches-3.18/064-MIPS-ralink-fix-clearing-the-illegal-access-interrup.patch Normal file
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@ -0,0 +1,31 @@
From f5d9bea58b576b50cdc0d7a607646b0849ff79c4 Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jogo@openwrt.org>
Date: Mon, 25 May 2015 16:51:34 +0200
Subject: [PATCH] MIPS: ralink: fix clearing the illegal access interrupt
Due to a typo the illegal access interrupt is never cleared in by
the interupt handler, causing an effective deadlock on the first
illegal access.
This was broken since the code was introduced in 5433acd81e87 ("MIPS:
ralink: add illegal access driver"), but only exposed when the Kconfig
symbol was added, thus enabling the code.
Cc: <stable@vger.kernel.org> [3.18+]
Fixes: a7b7aad383c ("MIPS: ralink: add missing symbol for RALINK_ILL_ACC")
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
---
arch/mips/ralink/ill_acc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/mips/ralink/ill_acc.c
+++ b/arch/mips/ralink/ill_acc.c
@@ -41,7 +41,7 @@ static irqreturn_t ill_acc_irq_handler(i
addr, (type >> ILL_ACC_OFF_S) & ILL_ACC_OFF_M,
type & ILL_ACC_LEN_M);
- rt_memc_w32(REG_ILL_ACC_TYPE, REG_ILL_ACC_TYPE);
+ rt_memc_w32(ILL_INT_STATUS, REG_ILL_ACC_TYPE);
return IRQ_HANDLED;
}