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ARM: 9323/1: mm: Fix ARCH_LOW_ADDRESS_LIMIT when CONFIG_ZONE_DMA
[ Upstream commit399da29ff5
] Configuring VMSPLIT_2G + LPAE on Raspberry Pi 4 leads to SWIOTLB buffer allocation beyond platform dma_zone_size of SZ_1G, which results in broken SD card boot. So fix this be setting ARCH_LOW_ADDRESS_LIMIT in CONFIG_ZONE_DMA case. Suggested-by: Russell King <rmk+kernel@armlinux.org.uk> Fixes:e9faf9b0b0
("ARM: add multi_v7_lpae_defconfig") Signed-off-by: Stefan Wahren <wahrenst@gmx.net> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -12,6 +12,9 @@
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extern phys_addr_t arm_dma_zone_size; \
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arm_dma_zone_size && arm_dma_zone_size < (0x100000000ULL - PAGE_OFFSET) ? \
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(PAGE_OFFSET + arm_dma_zone_size) : 0xffffffffUL; })
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extern phys_addr_t arm_dma_limit;
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#define ARCH_LOW_ADDRESS_LIMIT arm_dma_limit
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#endif
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#ifdef CONFIG_ISA_DMA_API
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