From e6bef7f1fafb6b0f69c2194821d93b3244dd5c0a Mon Sep 17 00:00:00 2001 From: Andrei Gherzan Date: Tue, 16 Jul 2019 13:28:22 +0100 Subject: [PATCH] arm64/mm: Limit the DMA zone for arm64 On RaspberryPi, only the first 1Gb can be used for DMA[1]. [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2019-July/665986.html Signed-off-by: Andrei Gherzan --- arch/arm64/mm/init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 774c3e17c7982..75006fa076a01 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -475,7 +475,7 @@ void __init arm64_memblock_init(void) /* 4GB maximum for 32-bit only capable devices */ if (IS_ENABLED(CONFIG_ZONE_DMA32)) - arm64_dma_phys_limit = max_zone_dma_phys(); + arm64_dma_phys_limit = 0x40000000; else arm64_dma_phys_limit = PHYS_MASK + 1;