[PATCH v2 net 0/3] net: hns3: three fixes for hns3 driver

[Jijie Shao]

This series contains three bug fixes for the HNS3 driver.

Patch 1 fixes a vector resource leak in the error path of
hns3_nic_alloc_vector_data, where a devm_kcalloc failure after
successful get_vector() leaves allocated vectors unreleased.

Patch 2 fixes an interface stall that occurs when the hardware RX
queue is full and memory allocation fails.  Without an RX interrupt,
NAPI is never scheduled and the queue cannot drain.  A delayed work
re-arms NAPI polling on affected vectors to break the deadlock.

Patch 3 fixes a use-after-free in debugfs read callbacks that can
access priv->ring and ring->desc while reset, driver unload, or
ethtool ring resize is freeing those resources.  A mutex is added
to synchronize debugfs readers against resource teardown.

---
Changes in v2:
Patch 1:
  - No change.
Patch 2:
  - Clear per-vector OOM bitmap when device is DOWN to avoid
    spurious napi_schedule() on next up event.
  - Move rx_oom_cnt accounting to hns3_ring_set_oom_state() with
    test_and_set_bit() for per-event counting.
Patch 3:
  - Drop hclge_debugfs.c changes; mutex only protects enet-layer.
  - Replace guard(mutex) with explicit mutex_lock/unlock.
  - Remove redundant NULL checks; unify -EPERM to -EBUSY.
v1: https://lore.kernel.org/all/20260915132434.1141742-1-shaojijie@xxxxxxxxxx/
---

Jijie Shao (3):
  net: hns3: fix vector resource leak in hns3_nic_alloc_vector_data
  net: hns3: fix interface stuck after OOM with full hardware rx queue
  net: hns3: fix use-after-free in debugfs read during reset/unload

 drivers/net/ethernet/hisilicon/hns3/hnae3.h   |   1 +
 .../ethernet/hisilicon/hns3/hns3_debugfs.c    | 124 +++++++++++--------
 .../net/ethernet/hisilicon/hns3/hns3_enet.c   |  70 +++++++++-
 .../net/ethernet/hisilicon/hns3/hns3_enet.h   |  18 +++
 .../ethernet/hisilicon/hns3/hns3_ethtool.c    |   3 +
 5 files changed, 167 insertions(+), 49 deletions(-)

base-commit: 305deb54c6c287e586bed92da2375ae1220e8dde
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2.43.0