From: Greg Rose <gregory.v.rose@intel.com>
Date: Thu, 1 Jul 2010 13:39:23 +0000 (+0000)
Subject: igb: Add comment
X-Git-Tag: v2.6.36-rc1~571^2~376
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=de42edde131cd09a556f0b90373569d64b92ef99;p=platform%2Fkernel%2Flinux-3.10.git

igb: Add comment

Add explanatory comment to avoid confusion when a pointer is set
to the second word of an array instead of the customary cast of a
pointer to the beginning of the array.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index d811462..9cb04e2 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -4974,6 +4974,10 @@ static void igb_vf_reset_msg(struct igb_adapter *adapter, u32 vf)
 
 static int igb_set_vf_mac_addr(struct igb_adapter *adapter, u32 *msg, int vf)
 {
+	/*
+	 * The VF MAC Address is stored in a packed array of bytes
+	 * starting at the second 32 bit word of the msg array
+	 */
 	unsigned char *addr = (char *)&msg[1];
 	int err = -1;