target/linux/bcm27xx/patches-5.4/950-0318-dma-direct-Temporary-DMA-fix-on-arm64.patch

   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
   5
   6 See: https://github.com/raspberrypi/linux/issues/3251
   7
   8 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
   9 ---
  10  kernel/dma/direct.c | 2 +-
  11  1 file changed, 1 insertion(+), 1 deletion(-)
  12
  13 --- a/kernel/dma/direct.c
  14 +++ b/kernel/dma/direct.c
  15 @@ -397,7 +397,7 @@ int dma_direct_supported(struct device *
  16         if (IS_ENABLED(CONFIG_ZONE_DMA))
  17                 min_mask = DMA_BIT_MASK(ARCH_ZONE_DMA_BITS);
  18         else
  19 -               min_mask = DMA_BIT_MASK(32);
  20 +               min_mask = DMA_BIT_MASK(30);
  21
  22         min_mask = min_t(u64, min_mask, (max_pfn - 1) << PAGE_SHIFT);
  23