swiotlb: use wrap_area_index() instead of open-coding it

No functional change, just use an existing helper.

Signed-off-by: Petr Tesarik <petr.tesarik.ext@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 91454b5..3856e2b 100644 (file)
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -695,10 +695,7 @@ found:
        /*
         * Update the indices to avoid searching in the next round.
         */
-       if (index + nslots < mem->area_nslabs)
-               area->index = index + nslots;
-       else
-               area->index = 0;
+       area->index = wrap_area_index(mem, index + nslots);
        area->used += nslots;
        spin_unlock_irqrestore(&area->lock, flags);
        return slot_index;