[dpdk-dev] [PATCH v2] net/ixgbe: fix RSS RETA be reset after port start

[Murphy Yang]

If one calls ‘rte_eth_dev_rss_reta_update’ with ixgbe before starting
the device (but after setting everything else), then RSS RETA
configuration be zero after starting the device.

This patch gives a notification if the port not started.

Bugzilla ID: 664
Fixes: 249358424eab ("ixgbe: RSS RETA configuration")

Signed-off-by: Murphy Yang <murphyx.y...@intel.com>
---
v2:
- tune the return value

 drivers/net/ixgbe/ixgbe_ethdev.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 8a9a21e7c2..6aebf9c11e 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -5015,11 +5015,19 @@ ixgbe_dev_rss_reta_update(struct rte_eth_dev *dev,
        uint32_t reta, r;
        uint16_t idx, shift;
        struct ixgbe_adapter *adapter = dev->data->dev_private;
+       struct rte_eth_dev_data *dev_data = dev->data;
        struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
        uint32_t reta_reg;
 
        PMD_INIT_FUNC_TRACE();
 
+       if (!dev_data->dev_started) {
+               PMD_DRV_LOG(ERR,
+                       "port %d must be started before configuration",
+                        dev_data->port_id);
+               return -EIO;
+       }
+
        if (!ixgbe_rss_update_sp(hw->mac.type)) {
                PMD_DRV_LOG(ERR, "RSS reta update is not supported on this "
                        "NIC.");
-- 
2.17.1