cxgb4vf: remove obsolete DECLARE_PCI_UNMAP_ADDR usage

We could use DEFINE_DMA_UNMAP_ADDR instead but using
CONFIG_NEED_DMA_MAP_STATE is a simpler way to see if a platform does
real DMA unmapping.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 9 deletions

diff --git a/drivers/net/cxgb4vf/sge.c b/drivers/net/cxgb4vf/sge.c
index 3a7c02f98a4d..4bc1858dc303 100644
--- a/drivers/net/cxgb4vf/sge.c
+++ b/drivers/net/cxgb4vf/sge.c
@@ -228,15 +228,11 @@ static inline bool is_buf_mapped(const struct rx_sw_desc *sdesc)
  */
 static inline int need_skb_unmap(void)
 {
-        /*
-         * This structure is used to tell if the platfrom needs buffer
-         * unmapping by checking if DECLARE_PCI_UNMAP_ADDR defines anything.
-         */
-        struct dummy {
-                DECLARE_PCI_UNMAP_ADDR(addr);
-        };
-
-        return sizeof(struct dummy) != 0;
+#ifdef CONFIG_NEED_DMA_MAP_STATE
+        return 1;
+#else
+        return 0;
+#endif
 }
 
 /**