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-rw-r--r--arch/loongarch/kernel/dma.c9
1 files changed, 2 insertions, 7 deletions
diff --git a/arch/loongarch/kernel/dma.c b/arch/loongarch/kernel/dma.c
index 7a9c6a9dd2..429555fb4e 100644
--- a/arch/loongarch/kernel/dma.c
+++ b/arch/loongarch/kernel/dma.c
@@ -8,17 +8,12 @@
void acpi_arch_dma_setup(struct device *dev)
{
int ret;
- u64 mask, end = 0;
+ u64 mask, end;
const struct bus_dma_region *map = NULL;
ret = acpi_dma_get_range(dev, &map);
if (!ret && map) {
- const struct bus_dma_region *r = map;
-
- for (end = 0; r->size; r++) {
- if (r->dma_start + r->size - 1 > end)
- end = r->dma_start + r->size - 1;
- }
+ end = dma_range_map_max(map);
mask = DMA_BIT_MASK(ilog2(end) + 1);
dev->bus_dma_limit = end;