[dpdk-dev] [dpdk-stable] [PATCH v2] net/tap: fix memory leak when unregister intr handler

[Yunjian Wang]

The return check of function tap_lsc_intr_handle_set() is wrong, it should
be 0 or a positive number if success. So the intr_handle->intr_vec was not
been freed when tap_lsc_intr_handle_set() returned a positive number.

Fixes: 4870a8cdd968 ("net/tap: support Rx interrupt")
Cc: stable at dpdk.org

Signed-off-by: Yunjian Wang <wangyunjian at huawei.com>
---
v2:
 * Modify according to Ferruh's suggestions
---
 drivers/net/tap/rte_eth_tap.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index a13d8d50d..05470a211 100644
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -1591,8 +1591,11 @@ tap_intr_handle_set(struct rte_eth_dev *dev, int set)
 	int err;
 
 	err = tap_lsc_intr_handle_set(dev, set);
-	if (err)
+	if (err < 0) {
+		if (!set)
+			tap_rx_intr_vec_set(dev, 0);
 		return err;
+	}
 	err = tap_rx_intr_vec_set(dev, set);
 	if (err && set)
 		tap_lsc_intr_handle_set(dev, 0);
-- 
2.19.1