[dpdk-dev] [PATCH v3 2/2] net/igb: fix add/delete of flex filters

[Markus Theil <markus.theil@tu-ilmenau.de>]

Before this patch, flex_filter->index was always zero when it was read
and used after rte_zmalloc. The corresponding code was therefore moved
into the add and delete parts of the if/else statement.

Fixes: 231d43909a31 ("igb: migrate flex filter to new API")

Signed-off-by: Markus Theil <markus.theil@tu-ilmenau.de>
---
 drivers/net/e1000/igb_ethdev.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index 631ace6..91b7e86 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -3913,10 +3913,6 @@ eth_igb_add_del_flex_filter(struct rte_eth_dev *dev,
 	}
 
 	wufc = E1000_READ_REG(hw, E1000_WUFC);
-	if (flex_filter->index < E1000_MAX_FHFT)
-		reg_off = E1000_FHFT(flex_filter->index);
-	else
-		reg_off = E1000_FHFT_EXT(flex_filter->index - E1000_MAX_FHFT);
 
 	if (add) {
 		if (eth_igb_flex_filter_lookup(&filter_info->flex_list,
@@ -3946,6 +3942,11 @@ eth_igb_add_del_flex_filter(struct rte_eth_dev *dev,
 			return -ENOSYS;
 		}
 
+		if (flex_filter->index < E1000_MAX_FHFT)
+			reg_off = E1000_FHFT(flex_filter->index);
+		else
+			reg_off = E1000_FHFT_EXT(flex_filter->index - E1000_MAX_FHFT);
+
 		E1000_WRITE_REG(hw, E1000_WUFC, wufc | E1000_WUFC_FLEX_HQ |
 				(E1000_WUFC_FLX0 << flex_filter->index));
 		queueing = filter->len |
@@ -3974,6 +3975,11 @@ eth_igb_add_del_flex_filter(struct rte_eth_dev *dev,
 			return -ENOENT;
 		}
 
+		if (it->index < E1000_MAX_FHFT)
+			reg_off = E1000_FHFT(it->index);
+		else
+			reg_off = E1000_FHFT_EXT(it->index - E1000_MAX_FHFT);
+
 		for (i = 0; i < E1000_FHFT_SIZE_IN_DWD; i++)
 			E1000_WRITE_REG(hw, reg_off + i * sizeof(uint32_t), 0);
 		E1000_WRITE_REG(hw, E1000_WUFC, wufc &
-- 
2.7.4