staging: qlge: Factor out duplicated expression

Given that (u16) 65536 == 0, that expression can be replaced by a simple
cast.
Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-12-bpoirier@suse.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/qlge/qlge.h

@@ -77,6 +77,11 @@
 #define LSD(x)  ((u32)((u64)(x)))
 #define MSD(x)  ((u32)((((u64)(x)) >> 32)))
 
+/* In some cases, the device interprets a value of 0x0000 as 65536. These
+ * cases are marked using the following macro.
+ */
+#define QLGE_FIT16(value) ((u16)(value))
+
 /* MPI test register definitions. This register
  * is used for determining alternate NIC function's
  * PCI->func number.

drivers/staging/qlge/qlge_main.c

@@ -2974,7 +2974,6 @@ static int ql_start_rx_ring(struct ql_adapter *qdev, struct rx_ring *rx_ring)
 	void __iomem *doorbell_area =
 	    qdev->doorbell_area + (DB_PAGE_SIZE * (128 + rx_ring->cq_id));
 	int err = 0;
-	u16 bq_len;
 	u64 tmp;
 	__le64 *base_indirect_ptr;
 	int page_entries;
@@ -3009,8 +3008,8 @@ static int ql_start_rx_ring(struct ql_adapter *qdev, struct rx_ring *rx_ring)
 	memset((void *)cqicb, 0, sizeof(struct cqicb));
 	cqicb->msix_vect = rx_ring->irq;
 
-	bq_len = (rx_ring->cq_len == 65536) ? 0 : (u16) rx_ring->cq_len;
-	cqicb->len = cpu_to_le16(bq_len | LEN_V | LEN_CPP_CONT);
+	cqicb->len = cpu_to_le16(QLGE_FIT16(rx_ring->cq_len) | LEN_V |
+				 LEN_CPP_CONT);
 
 	cqicb->addr = cpu_to_le64(rx_ring->cq_base_dma);
 
@@ -3034,12 +3033,9 @@ static int ql_start_rx_ring(struct ql_adapter *qdev, struct rx_ring *rx_ring)
 			page_entries++;
 		} while (page_entries < MAX_DB_PAGES_PER_BQ(rx_ring->lbq.len));
 		cqicb->lbq_addr = cpu_to_le64(rx_ring->lbq.base_indirect_dma);
-		bq_len = qdev->lbq_buf_size == 65536 ? 0 :
-			(u16)qdev->lbq_buf_size;
-		cqicb->lbq_buf_size = cpu_to_le16(bq_len);
-		bq_len = (rx_ring->lbq.len == 65536) ? 0 :
-			(u16)rx_ring->lbq.len;
-		cqicb->lbq_len = cpu_to_le16(bq_len);
+		cqicb->lbq_buf_size =
+			cpu_to_le16(QLGE_FIT16(qdev->lbq_buf_size));
+		cqicb->lbq_len = cpu_to_le16(QLGE_FIT16(rx_ring->lbq.len));
 		rx_ring->lbq.prod_idx = 0;
 		rx_ring->lbq.curr_idx = 0;
 		rx_ring->lbq.clean_idx = 0;
@@ -3059,9 +3055,7 @@ static int ql_start_rx_ring(struct ql_adapter *qdev, struct rx_ring *rx_ring)
 		cqicb->sbq_addr =
 		    cpu_to_le64(rx_ring->sbq.base_indirect_dma);
 		cqicb->sbq_buf_size = cpu_to_le16(SMALL_BUFFER_SIZE);
-		bq_len = (rx_ring->sbq.len == 65536) ? 0 :
-			(u16)rx_ring->sbq.len;
-		cqicb->sbq_len = cpu_to_le16(bq_len);
+		cqicb->sbq_len = cpu_to_le16(QLGE_FIT16(rx_ring->sbq.len));
 		rx_ring->sbq.prod_idx = 0;
 		rx_ring->sbq.curr_idx = 0;
 		rx_ring->sbq.clean_idx = 0;