diff mbox series

[v2,06/12] net/cxgbe: avoid polling link status before device start

Message ID 89d3ccd57d368ac552936741ae22bb581174a151.1569611036.git.rahul.lakkireddy@chelsio.com (mailing list archive)
State Accepted, archived
Delegated to: Ferruh Yigit
Headers
Series net/cxgbe: bug fixes and updates for CXGBE/CXGBEVF PMD |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Rahul Lakkireddy Sept. 27, 2019, 8:30 p.m. UTC 
  Link updates come in firmware event queue, which is only created
when device starts. So, don't poll for link status if firmware
event queue is not yet created.

This fixes NULL dereference when accessing non existent firmware
event queue.

Cc: stable@dpdk.org
Fixes: 265af08e75ba ("net/cxgbe: add link up and down ops")

Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
---
v2:
- No changes.

 drivers/net/cxgbe/cxgbe_ethdev.c | 9 +++++++++
 1 file changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/cxgbe/cxgbe_ethdev.c b/drivers/net/cxgbe/cxgbe_ethdev.c
index 5d74f8ba3..5df8d746c 100644
--- a/drivers/net/cxgbe/cxgbe_ethdev.c
+++ b/drivers/net/cxgbe/cxgbe_ethdev.c
@@ -206,6 +206,9 @@  int cxgbe_dev_link_update(struct rte_eth_dev *eth_dev,
 	u8 old_link = pi->link_cfg.link_ok;
 
 	for (i = 0; i < CXGBE_LINK_STATUS_POLL_CNT; i++) {
+		if (!s->fw_evtq.desc)
+			break;
+
 		cxgbe_poll(&s->fw_evtq, NULL, budget, &work_done);
 
 		/* Exit if link status changed or always forced up */
@@ -239,6 +242,9 @@  int cxgbe_dev_set_link_up(struct rte_eth_dev *dev)
 	struct sge *s = &adapter->sge;
 	int ret;
 
+	if (!s->fw_evtq.desc)
+		return -ENOMEM;
+
 	/* Flush all link events */
 	cxgbe_poll(&s->fw_evtq, NULL, budget, &work_done);
 
@@ -265,6 +271,9 @@  int cxgbe_dev_set_link_down(struct rte_eth_dev *dev)
 	struct sge *s = &adapter->sge;
 	int ret;
 
+	if (!s->fw_evtq.desc)
+		return -ENOMEM;
+
 	/* Flush all link events */
 	cxgbe_poll(&s->fw_evtq, NULL, budget, &work_done);