linux-kernel - [PATCH 4.4 016/312] MIPS: BMIPS: local_r4k___flush_cache

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Date:   Fri,  8 May 2020 14:30:07 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Florian Fainelli <f.fainelli@...il.com>,
        linux-mips@...ux-mips.org, Ralf Baechle <ralf@...ux-mips.org>
Subject: [PATCH 4.4 016/312] MIPS: BMIPS: local_r4k___flush_cache_all needs to blast S-cache

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: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/mips/mm/c-r4k.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -447,6 +447,11 @@ static inline void local_r4k___flush_cac
 		r4k_blast_scache();
 		break;
 
+	case CPU_BMIPS5000:
+		r4k_blast_scache();
+		__sync();
+		break;
+
 	default:
 		r4k_blast_dcache();
 		r4k_blast_icache();