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ARM: 7908/1: mm: Fix the arm_dma_limit calculation
Current code is using PHYS_OFFSET to calculate the arm_dma_limit which will lead to wrong calculations in cases where PHYS_OFFSET is updated runtime. So fix the code by using __pv_phys_offset instead of PHYS_OFFSET. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -229,7 +229,7 @@ void __init setup_dma_zone(const struct machine_desc *mdesc)
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#ifdef CONFIG_ZONE_DMA
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if (mdesc->dma_zone_size) {
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arm_dma_zone_size = mdesc->dma_zone_size;
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arm_dma_limit = PHYS_OFFSET + arm_dma_zone_size - 1;
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arm_dma_limit = __pv_phys_offset + arm_dma_zone_size - 1;
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} else
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arm_dma_limit = 0xffffffff;
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arm_dma_pfn_limit = arm_dma_limit >> PAGE_SHIFT;
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