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Reboot starts failing on Poplar since commit8424ecdde7("arm64: mm: Set ZONE_DMA size based on devicetree's dma-ranges"), which effectively changes zone_dma_bits from 30 to 32 for arm64 platforms that do not properly define dma-ranges in device tree. It's unclear how Poplar reboot gets broken by this change exactly, but a dma-ranges limiting zone_dma to the first 1 GB fixes the regression. Fixes:2f20182ed6("arm64: dts: hisilicon: add dts files for hi3798cv200-poplar board") Cc: stable@vger.kernel.org Signed-off-by: Shawn Guo <shawnguo@kernel.org> Signed-off-by: Wei Xu <xuwei5@hisilicon.com>