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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Lichao Liu <liulichao@loongson.cn>,
        Jiaxun Yang <jiaxun.yang@flygoat.com>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Subject: [PATCH 5.7 270/376] MIPS: CPU_LOONGSON2EF need software to maintain cache consistency
Date:   Fri, 19 Jun 2020 16:33:08 +0200
Message-Id: <20200619141723.109778191@linuxfoundation.org>
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From: Lichao Liu <liulichao@loongson.cn>

commit a202bf71f08b3ef15356db30535e30b03cf23aec upstream.

CPU_LOONGSON2EF need software to maintain cache consistency,
so modify the 'cpu_needs_post_dma_flush' function to return true
when the cpu type is CPU_LOONGSON2EF.

Cc: stable@vger.kernel.org
Signed-off-by: Lichao Liu <liulichao@loongson.cn>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/mips/mm/dma-noncoherent.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/mips/mm/dma-noncoherent.c
+++ b/arch/mips/mm/dma-noncoherent.c
@@ -33,6 +33,7 @@ static inline bool cpu_needs_post_dma_fl
 	case CPU_R10000:
 	case CPU_R12000:
 	case CPU_BMIPS5000:
+	case CPU_LOONGSON2EF:
 		return true;
 	default:
 		/*