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