From: Harry van Haaren <harry.van.haaren@intel.com>
Date: Mon, 12 Oct 2015 16:45:32 +0000 (+0100)
Subject: ixgbevf: fix statistic wraparound
X-Git-Tag: spdx-start~8312
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=00b7ca600c111f85b4c63ccbadfb1a7ca7042551;p=dpdk.git

ixgbevf: fix statistic wraparound

Fix a misinterpretation of VF stats in ixgbe

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

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index ec2918cd3d..74239a4bff 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -329,10 +329,10 @@ static int ixgbe_timesync_read_tx_timestamp(struct rte_eth_dev *dev,
 /*
  * Define VF Stats MACRO for Non "cleared on read" register
  */
-#define UPDATE_VF_STAT(reg, last, cur)	                        \
+#define UPDATE_VF_STAT(reg, last, cur)                          \
 {                                                               \
 	uint32_t latest = IXGBE_READ_REG(hw, reg);              \
-	cur += latest - last;                                   \
+	cur += (latest - last) & UINT_MAX;                      \
 	last = latest;                                          \
 }