[PATCH net v2 0/2] net: stmmac: Fix XSK crashes on stm32mp2

[Kurt Kanzenbach]

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/

Signed-off-by: Kurt Kanzenbach <kurt at linutronix.de>
---
Changes in v2:
- Remove RFC. No comments.
- Link to v1: https://patch.msgid.link/20260915-stmmac_xsk_crashes-v1-0-e14553fcf553@linutronix.de

---
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 |  6 +++---
 drivers/net/ethernet/stmicro/stmmac/stmmac_xdp.c  | 14 ++++++++++++++
 2 files changed, 17 insertions(+), 3 deletions(-)
---
base-commit: aaaaf87ea99b8766c9a8aa0e71aa42e6bc8a5320
change-id: 20260914-stmmac_xsk_crashes-10a77f614ab5

Best regards,
--  
Kurt Kanzenbach <kurt at linutronix.de>