[PATCH] e1000: Added disable packet split capability

Adds the ability to disability packet split at compile time and use the legacy receive path on PCI express hardware.  Made this a CONFIG option and modified the Kconfig, to reflect the new option.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index d0a5d16..73b2a7b 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -1621,7 +1621,7 @@
 {
 	uint32_t rctl, rfctl;
 	uint32_t psrctl = 0;
-#ifdef CONFIG_E1000_PACKET_SPLIT
+#ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
 	uint32_t pages = 0;
 #endif
 
@@ -1672,7 +1672,7 @@
 		}
 	}
 
-#ifdef CONFIG_E1000_PACKET_SPLIT
+#ifndef CONFIG_E1000_DISABLE_PACKET_SPLIT
 	/* 82571 and greater support packet-split where the protocol
 	 * header is placed in skb->data and the packet data is
 	 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.