[dpdk-stable] [dpdk-dev] [PATCH v1 1/1] net/ice: fix link status down

[Mei, JianweiX]

Tested-by:  Mei,JianweiX < jianweix.mei at intel.com>

-----Original Message-----
From: dev <dev-bounces at dpdk.org> On Behalf Of yanx.fu at intel.com
Sent: Wednesday, September 9, 2020 6:47 AM
To: Zhang, Qi Z <qi.z.zhang at intel.com>; Guo, Jia <jia.guo at intel.com>
Cc: dev at dpdk.org; Fu, YanX <yanx.fu at intel.com>; stable at dpdk.org
Subject: [dpdk-dev] [PATCH v1 1/1] net/ice: fix link status down

From: FuYanX <yanx.fu at intel.com>

Add delay to ensure that the hardware FLR is completed.

Fixes: f9cf4f864150 (net/ice: support device initialization)
Cc: stable at dpdk.org

Signed-off-by: FuYanX <yanx.fu at intel.com>
---
 drivers/net/ice/ice_ethdev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c index 8d435e889..20bd85e62 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -2176,6 +2176,11 @@ ice_dev_init(struct rte_eth_dev *dev)
 
 	ice_init_controlq_parameter(hw);
 
+	/* The driver e.g. vfio-pci may triggle a FLR reset.
+	 * The operating system is required by PCIe specification to wait 100 ms
+	 * before it can assume that the FLR sequence is completed by hardware.
+	 */
+	rte_delay_ms(100);
 	ret = ice_init_hw(hw);
 	if (ret) {
 		PMD_INIT_LOG(ERR, "Failed to initialize HW");
--
2.25.1