[PATCH net v2 2/2] ice: drop udp_tunnel_get_rx_info() call from ndo_open()

[mheib@redhat.com]

From: Mohammad Heib <mheib@redhat.com>

The ice driver calls udp_tunnel_get_rx_info() during ice_open_internal().
This is redundant because UDP tunnel RX offload state is preserved
across device down/up cycles. The udp_tunnel core handles
synchronization automatically when required.

Furthermore, recent changes in the udp_tunnel infrastructure require
querying RX info while holding the udp_tunnel lock. Calling it
directly from the ndo_open path violates this requirement,
triggering the following lockdep warning:

Call Trace:
  <TASK>
  ice_open_internal+0x253/0x350 [ice]
  __udp_tunnel_nic_assert_locked+0x86/0xb0 [udp_tunnel]
  __dev_open+0x2f5/0x880
  __dev_change_flags+0x44c/0x660
  netif_change_flags+0x80/0x160
  devinet_ioctl+0xd21/0x15f0
  inet_ioctl+0x311/0x350
  sock_ioctl+0x114/0x220
  __x64_sys_ioctl+0x131/0x1a0
  ...
  </TASK>

Remove the redundant and unsafe call to udp_tunnel_get_rx_info() from
ice_open_internal() to resolve the locking violation

Fixes: a4e82a81f573 ("ice: Add support for tunnel offloads")
Signed-off-by: Mohammad Heib <mheib@redhat.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_main.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 2533876f1a2f..1f94bdcbbba9 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -9633,9 +9633,6 @@ int ice_open_internal(struct net_device *netdev)
 		netdev_err(netdev, "Failed to open VSI 0x%04X on switch 0x%04X\n",
 			   vsi->vsi_num, vsi->vsw->sw_id);
 
-	/* Update existing tunnels information */
-	udp_tunnel_get_rx_info(netdev);
-
 	return err;
 }
 
-- 
2.52.0