net/tap: fix queues fd check before close

The fd is possibly a negative value while it is passed as an
argument to function "close". Fix the check to the fd.

Fixes: ed8132e7c912 ("net/tap: move fds of queues to be in process private")
Cc: stable@dpdk.org
Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/drivers/net/tap/rte_eth_tap.c b/drivers/net/tap/rte_eth_tap.c
index e644f88..7081ae2 100644 (file)
--- a/drivers/net/tap/rte_eth_tap.c
+++ b/drivers/net/tap/rte_eth_tap.c
@@ -1089,7 +1089,7 @@ tap_rx_queue_release(void *queue)
        if (!rxq)
                return;
        process_private = rte_eth_devices[rxq->in_port].process_private;
-       if (process_private->rxq_fds[rxq->queue_id] > 0) {
+       if (process_private->rxq_fds[rxq->queue_id] != -1) {
                close(process_private->rxq_fds[rxq->queue_id]);
                process_private->rxq_fds[rxq->queue_id] = -1;
                tap_rxq_pool_free(rxq->pool);
@@ -1109,7 +1109,7 @@ tap_tx_queue_release(void *queue)
                return;
        process_private = rte_eth_devices[txq->out_port].process_private;
 
-       if (process_private->txq_fds[txq->queue_id] > 0) {
+       if (process_private->txq_fds[txq->queue_id] != -1) {
                close(process_private->txq_fds[txq->queue_id]);
                process_private->txq_fds[txq->queue_id] = -1;
        }

diff --git a/drivers/net/tap/tap_intr.c b/drivers/net/tap/tap_intr.c
index 58f36d3..5cf4f17 100644 (file)
--- a/drivers/net/tap/tap_intr.c
+++ b/drivers/net/tap/tap_intr.c
@@ -71,7 +71,7 @@ tap_rx_intr_vec_install(struct rte_eth_dev *dev)
                struct rx_queue *rxq = pmd->dev->data->rx_queues[i];
 
                /* Skip queues that cannot request interrupts. */
-               if (!rxq || process_private->rxq_fds[i] <= 0) {
+               if (!rxq || process_private->rxq_fds[i] == -1) {
                        /* Use invalid intr_vec[] index to disable entry. */
                        intr_handle->intr_vec[i] =
                                RTE_INTR_VEC_RXTX_OFFSET +