linux-kernel - [PATCH 4.2.y-ckt 186/206] MIPS: BMIPS: local_r4k___flush_cache

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Message-Id: <1465507015-23052-187-git-send-email-kamal@canonical.com>
Date:	Thu,  9 Jun 2016 14:16:35 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Florian Fainelli <f.fainelli@...il.com>, linux-mips@...ux-mips.org,
	Ralf Baechle <ralf@...ux-mips.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 4.2.y-ckt 186/206] MIPS: BMIPS: local_r4k___flush_cache_all needs to blast S-cache

4.2.8-ckt12 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Florian Fainelli <f.fainelli@...il.com>

commit f675843ddfdfdf467d08cc922201614a149e439e upstream.

local_r4k___flush_cache_all() is missing a special check for BMIPS5000
processors, we need to blast the S-cache, just like other MTI processors
since we have an inclusive cache. We also need an additional __sync() to
make sure this is completed.

Fixes: d74b0172e4e2c ("MIPS: BMIPS: Add special cache handling in c-r4k.c")
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
Cc: linux-mips@...ux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13012/
Signed-off-by: Ralf Baechle <ralf@...ux-mips.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 arch/mips/mm/c-r4k.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index f22809f..a50011a 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -447,6 +447,11 @@ static inline void local_r4k___flush_cache_all(void * args)
 		r4k_blast_scache();
 		break;
 
+	case CPU_BMIPS5000:
+		r4k_blast_scache();
+		__sync();
+		break;
+
 	default:
 		r4k_blast_dcache();
 		r4k_blast_icache();
-- 
2.7.4