1 From afde0ffa449eef528deb2fe455a512acd0569be4 Mon Sep 17 00:00:00 2001
2 From: Phil Elwell <phil@raspberrypi.org>
3 Date: Wed, 25 Sep 2019 09:49:58 +0100
4 Subject: [PATCH] dma-direct: Temporary DMA fix on arm64
6 See: https://github.com/raspberrypi/linux/issues/3251
8 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
10 kernel/dma/direct.c | 2 +-
11 1 file changed, 1 insertion(+), 1 deletion(-)
13 --- a/kernel/dma/direct.c
14 +++ b/kernel/dma/direct.c
15 @@ -398,7 +398,7 @@ int dma_direct_supported(struct device *
16 if (IS_ENABLED(CONFIG_ZONE_DMA))
17 min_mask = DMA_BIT_MASK(ARCH_ZONE_DMA_BITS);
19 - min_mask = DMA_BIT_MASK(32);
20 + min_mask = DMA_BIT_MASK(30);
22 min_mask = min_t(u64, min_mask, (max_pfn - 1) << PAGE_SHIFT);