1 files changed, 43 insertions, 46 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 025922807e6e..256c8445e54d 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -331,56 +331,53 @@ map_single(struct device *hwdev, char *buffer, size_t size, int dir)
 	 * request and allocate a buffer from that IO TLB pool.
 	 */
 	spin_lock_irqsave(&io_tlb_lock, flags);
-	{
-		index = ALIGN(io_tlb_index, stride);
-		if (index >= io_tlb_nslabs)
-			index = 0;
-		wrap = index;
-
-		do {
-			while (is_span_boundary(index, nslots, offset_slots,
-						max_slots)) {
-				index += stride;
-				if (index >= io_tlb_nslabs)
-					index = 0;
-				if (index == wrap)
-					goto not_found;
-			}
-
-			/*
-			 * If we find a slot that indicates we have 'nslots'
-			 * number of contiguous buffers, we allocate the
-			 * buffers from that slot and mark the entries as '0'
-			 * indicating unavailable.
-			 */
-			if (io_tlb_list[index] >= nslots) {
-				int count = 0;
-
-				for (i = index; i < (int) (index + nslots); i++)
-					io_tlb_list[i] = 0;
-				for (i = index - 1; (OFFSET(i, IO_TLB_SEGSIZE) != IO_TLB_SEGSIZE -1) && io_tlb_list[i]; i--)
-					io_tlb_list[i] = ++count;
-				dma_addr = io_tlb_start + (index << IO_TLB_SHIFT);
-
-				/*
-				 * Update the indices to avoid searching in
-				 * the next round.
-				 */
-				io_tlb_index = ((index + nslots) < io_tlb_nslabs
-						? (index + nslots) : 0);
-
-				goto found;
-			}
+	index = ALIGN(io_tlb_index, stride);
+	if (index >= io_tlb_nslabs)
+		index = 0;
+	wrap = index;
+
+	do {
+		while (is_span_boundary(index, nslots, offset_slots,
+				max_slots)) {
 			index += stride;
 			if (index >= io_tlb_nslabs)
 				index = 0;
-		} while (index != wrap);
+			if (index == wrap)
+				goto not_found;
+		}
 
-  not_found:
-		spin_unlock_irqrestore(&io_tlb_lock, flags);
-		return NULL;
-	}
-  found:
+		/*
+		 * If we find a slot that indicates we have 'nslots' number of
+		 * contiguous buffers, we allocate the buffers from that slot
+		 * and mark the entries as '0' indicating unavailable.
+		 */
+		if (io_tlb_list[index] >= nslots) {
+			int count = 0;
+
+			for (i = index; i < (int) (index + nslots); i++)
+				io_tlb_list[i] = 0;
+			for (i = index - 1; (OFFSET(i, IO_TLB_SEGSIZE) != IO_TLB_SEGSIZE - 1) && io_tlb_list[i]; i--)
+				io_tlb_list[i] = ++count;
+			dma_addr = io_tlb_start + (index << IO_TLB_SHIFT);
+
+			/*
+			 * Update the indices to avoid searching in the next
+			 * round.
+			 */
+			io_tlb_index = ((index + nslots) < io_tlb_nslabs
+					? (index + nslots) : 0);
+
+			goto found;
+		}
+		index += stride;
+		if (index >= io_tlb_nslabs)
+			index = 0;
+	} while (index != wrap);
+
+not_found:
+	spin_unlock_irqrestore(&io_tlb_lock, flags);
+	return NULL;
+found:
 	spin_unlock_irqrestore(&io_tlb_lock, flags);
 
 	/*