igb: warn if max_vfs limit is exceeded

Currently there's no warning printed when max_vfs > 7 is specified with
igb and the maximum of 7 is silently enforced. This patch prints a
warning and informs the user of the actions taken.

Signed-off-by: Stefan Assmann <sassmann@redhat.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 579dbba..eef380a 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -2291,7 +2291,12 @@
 	switch (hw->mac.type) {
 	case e1000_82576:
 	case e1000_i350:
-		adapter->vfs_allocated_count = (max_vfs > 7) ? 7 : max_vfs;
+		if (max_vfs > 7) {
+			dev_warn(&pdev->dev,
+				 "Maximum of 7 VFs per PF, using max\n");
+			adapter->vfs_allocated_count = 7;
+		} else
+			adapter->vfs_allocated_count = max_vfs;
 		break;
 	default:
 		break;