[PATCH net-next v4 0/2] net: stmmac: Fix XSK crashes on stm32mp2

Hi,

while looking at the TBS thingy [1], I've noticed kernel crashes. That
happens when opening or closing an AF_XDP/ZC socket while parallel Tx
traffic is going on.

So far, I see two issues:

 - Patch #1: stmmac_xdp_release() seems to have the teardown order wrong
 - Patch #2: stmmac_xdp_(en|dis)able_pool() does not stop the Tx queue
   at all

The kernel crashes can be reproduced instantly on the stm32mp2 like this:

 - Run iperf3
 - Run application which opens an AF_XDP/ZC socket

[1] - https://lore.kernel.org/all/20260812-stm32mp2_txtime-v1-1-f9e2462cc85d@linutronix.de/ (local)

Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
---
Changes in v4:
- Rebase to net-next (Jakub)
- Add tags (Nicolai)
- Link to v3: https://patch.msgid.link/20261013-stmmac_xsk_crashes-v3-0-50fca7790af2@linutronix.de (local)

Changes in v3:
- Remove txq_trans_cond_update() (Maciej)
- Add queue stop check for XDP TX etc. (Nicolai)
- Add tags (Nicolai and Maxime)
- Link to v2: https://patch.msgid.link/20261005-stmmac_xsk_crashes-v2-0-46c60cba6421@linutronix.de (local)

Changes in v2:
- Remove RFC. No comments.
- Link to v1: https://patch.msgid.link/20260915-stmmac_xsk_crashes-v1-0-e14553fcf553@linutronix.de (local)

---
Kurt Kanzenbach (2):
      net: stmmac: Disable NAPI before stopping Tx queues in stmmac_xdp_release()
      net: stmmac: Stop Tx queue when (en|dis)abling XSK pools

 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 10 +++++++---
 drivers/net/ethernet/stmicro/stmmac/stmmac_xdp.c  | 13 +++++++++++++
 2 files changed, 20 insertions(+), 3 deletions(-)
---
base-commit: f71ff7d406523748bfb8236830c7eaa6a308aaa1
change-id: 20260914-stmmac_xsk_crashes-10a77f614ab5

Best regards,
--  
Kurt Kanzenbach [off-list ref]