From: Harry van Haaren <harry.van.haaren@intel.com>
Date: Mon, 12 Oct 2015 16:45:33 +0000 (+0100)
Subject: igbvf: fix statistic wraparound
X-Git-Tag: spdx-start~8313
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=795618c0aa534835e7cbbe7da80991eb624e5a84;p=dpdk.git

igbvf: fix statistic wraparound

Fix a misinterpreatation of VF statistic macro in e1000/igb.

Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
Acked-by: Roger Melton <rmelton@cisco.com>
---

diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index 422d718efb..3ab082e3ff 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -246,11 +246,10 @@ static void eth_igb_configure_msix_intr(struct rte_eth_dev *dev);
 #define UPDATE_VF_STAT(reg, last, cur)            \
 {                                                 \
 	u32 latest = E1000_READ_REG(hw, reg);     \
-	cur += latest - last;                     \
+	cur += (latest - last) & UINT_MAX;        \
 	last = latest;                            \
 }
 
-
 #define IGB_FC_PAUSE_TIME 0x0680
 #define IGB_LINK_UPDATE_CHECK_TIMEOUT  90  /* 9s */
 #define IGB_LINK_UPDATE_CHECK_INTERVAL 100 /* ms */