[dpdk-dev] [PATCH] net/fm10k: fix MAC address remnant in switch

[Xiao Wang]

When testpmd quits with two ports, the second port's MAC address
remains in the MAC table of switch manager.

There should be some time for HW to quiesce when closing a port,
otherwise the subsequent port close won't be handled correctly.

This patch adds some delay after turning off a logic port, just as
what the kernel driver does.

Fixes: 8b5c9ec20b7b ("support VMDQ in MAC/VLAN filter")

Reported-by: Xueqin Lin <xueqin.lin at intel.com>
Signed-off-by: Xiao Wang <xiao.w.wang at intel.com>
---
 drivers/net/fm10k/fm10k_ethdev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c
index 01f4a72..89d99d4 100644
--- a/drivers/net/fm10k/fm10k_ethdev.c
+++ b/drivers/net/fm10k/fm10k_ethdev.c
@@ -52,6 +52,8 @@
 #define MAX_QUERY_SWITCH_STATE_TIMES 10
 /* Wait interval to get switch status */
 #define WAIT_SWITCH_MSG_US    100000
+/* A period of quiescence for switch */
+#define FM10K_SWITCH_QUIESCE_US 10000
 /* Number of chars per uint32 type */
 #define CHARS_PER_UINT32 (sizeof(uint32_t))
 #define BIT_MASK_PER_UINT32 ((1 << CHARS_PER_UINT32) - 1)
@@ -1233,6 +1235,9 @@ fm10k_dev_close(struct rte_eth_dev *dev)
 		MAX_LPORT_NUM, false);
 	fm10k_mbx_unlock(hw);
 
+	/* allow 10ms for device to quiesce */
+	rte_delay_us(FM10K_SWITCH_QUIESCE_US);
+
 	/* Stop mailbox service first */
 	fm10k_close_mbx_service(hw);
 	fm10k_dev_stop(dev);
-- 
1.9.3