Modified UPDATE_VF_STAT to properly handle rollover conditions.
Signed-off-by: David Harton <dhar...@cisco.com>
---
drivers/net/e1000/igb_ethdev.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index a3e30dbe5..825663267 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -261,11 +261,15 @@ static int igb_filter_restore(struct rte_eth_dev *dev);
/*
* Define VF Stats MACRO for Non "cleared on read" register
*/
-#define UPDATE_VF_STAT(reg, last, cur) \
-{ \
- u32 latest = E1000_READ_REG(hw, reg); \
- cur += (latest - last) & UINT_MAX; \
- last = latest; \
+#define UPDATE_VF_STAT(reg, last, cur) \
+{ \
+ u32 latest = E1000_READ_REG(hw, reg); \
+ if (latest >= last) \
+ cur += (latest - last); \
+ else \
+ cur += ((latest + ((uint64_t)1 << 32)) - last); \
+ cur &= UINT_MAX; \
+ last = latest; \
}
#define IGB_FC_PAUSE_TIME 0x0680
--
2.19.1
