[PATCH 4.19 192/267] MIPS: CPU_LOONGSON2EF need software to maintain cache consistency

[Greg Kroah-Hartman]

From: Lichao Liu <liulichao@xxxxxxxxxxx>

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@xxxxxxxxxxxxxxx
Signed-off-by: Lichao Liu <liulichao@xxxxxxxxxxx>
Reviewed-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
Signed-off-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 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
@@ -56,6 +56,7 @@ static inline bool cpu_needs_post_dma_fl
 	case CPU_R10000:
 	case CPU_R12000:
 	case CPU_BMIPS5000:
+	case CPU_LOONGSON2EF:
 		return true;
 	default:
 		/*