diff options
| author | Baruch Siach <baruch@tkos.co.il> | 2024-08-28 12:51:24 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2024-08-29 07:21:07 +0300 |
| commit | 833bd284a45448f04ab9fcd4fdf7ef594d458eed (patch) | |
| tree | 698c103719342bfcb735550b36221cc1113b02f2 | |
| parent | b5c58b2fdc427e7958412ecb2de2804a1f7c1572 (diff) | |
arm64: mm: fix DMA zone when dma-ranges is missing
Some platforms, like Rockchip RK3568 based Odroid M1, do not provide DMA
limits information in device-tree dma-ranges property. Still some device
drivers set DMA limit that relies on DMA zone at low 4GB memory area.
Until commit ba0fb44aed47 ("dma-mapping: replace zone_dma_bits by
zone_dma_limit"), zone_sizes_init() restricted DMA zone to low 32-bit.
Restore DMA zone 32-bit limit when the platform provides no DMA bus
limit information.
Fixes: ba0fb44aed47 ("dma-mapping: replace zone_dma_bits by zone_dma_limit")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/53d988b1-bdce-422a-ae4e-158f305ad703@samsung.com
Suggested-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | arch/arm64/mm/init.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index bfb10969cbf0..5710129b8033 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -116,6 +116,9 @@ static void __init arch_reserve_crashkernel(void) static phys_addr_t __init max_zone_phys(phys_addr_t zone_limit) { + if (zone_limit == PHYS_ADDR_MAX) + zone_limit = U32_MAX; + return min(zone_limit, memblock_end_of_DRAM() - 1) + 1; } |