diff options
Diffstat (limited to 'drivers/acpi/arm64/dma.c')
| -rw-r--r-- | drivers/acpi/arm64/dma.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/acpi/arm64/dma.c b/drivers/acpi/arm64/dma.c index 93d796531af3..b98a149f8d50 100644 --- a/drivers/acpi/arm64/dma.c +++ b/drivers/acpi/arm64/dma.c @@ -8,7 +8,6 @@ void acpi_arch_dma_setup(struct device *dev) { int ret; u64 end, mask; - u64 size = 0; const struct bus_dma_region *map = NULL; /* @@ -23,9 +22,9 @@ void acpi_arch_dma_setup(struct device *dev) } if (dev->coherent_dma_mask) - size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1); + end = dev->coherent_dma_mask; else - size = 1ULL << 32; + end = (1ULL << 32) - 1; ret = acpi_dma_get_range(dev, &map); if (!ret && map) { @@ -36,18 +35,16 @@ void acpi_arch_dma_setup(struct device *dev) end = r->dma_start + r->size - 1; } - size = end + 1; dev->dma_range_map = map; } if (ret == -ENODEV) - ret = iort_dma_get_ranges(dev, &size); + ret = iort_dma_get_ranges(dev, &end); if (!ret) { /* * Limit coherent and dma mask based on size retrieved from * firmware. */ - end = size - 1; mask = DMA_BIT_MASK(ilog2(end) + 1); dev->bus_dma_limit = end; dev->coherent_dma_mask = min(dev->coherent_dma_mask, mask); |