bnx2x: do not call link update without HW notification

Signed-off-by: NYaniv Rosner <yanivr@broadcom.com>
Signed-off-by: NVladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: NEilon Greenstein <eilong@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@conan.davemloft.net>

drivers/net/bnx2x/bnx2x_main.c

@@ -2847,9 +2847,15 @@ static void bnx2x_attn_int_asserted(struct bnx2x *bp, u32 asserted)
 
 			/* save nig interrupt mask */
 			nig_mask = REG_RD(bp, nig_int_mask_addr);
-			REG_WR(bp, nig_int_mask_addr, 0);
 
-			bnx2x_link_attn(bp);
+			/* If nig_mask is not set, no need to call the update
+			 * function.
+			 */
+			if (nig_mask) {
+				REG_WR(bp, nig_int_mask_addr, 0);
+
+				bnx2x_link_attn(bp);
+			}
 
 			/* handle unicore attn? */
 		}