[PATCH net-next v2 0/6] bnge: Support async events while down

[Bhargava Marreddy]

Hi,

This series refactors the bnge driver's Notification Queue 0 (NQ0) 
lifecycle so that NQ0 remains persistent across interface close/open 
cycles instead of being torn down and rebuilt each time.

This persistent NQ0 setup lays the groundwork for additional async events
in future patches.

v2:
  - Dropped patch 7/7 ("bnge: Process async events while administratively down"):
    - Link events while down are unnecessary to process since bnge_open() already 
     queries and updates PHY settings via bnge_update_phy_setting().
    - Keeps the series focused strictly on the NQ0/NAPI lifecycle refactoring.
  - Corrected the order of operations in bnge_quiesce_nq0() to disable NAPI
    first, synchronize IRQ, and then ring the doorbell to prevent NAPI
    rescheduling race conditions.
  - Added support for dynamic MSI-X vector reallocation by introducing
    bnge_reinit_nq0() during interface open.
  - Fixed potential NULL pointer dereferences in core ring cleanups (e.g. bn->rx_ring,
    bn->tx_ring, and bn->grp_info) on allocation failure paths and failed opens.
  - Fixed a resource leak in bnge_init_nic() where RX ring pair buffers
    were leaked if chip initialization failed.
  - Corrected the MSI-X vector demand check in bnge_resc.c to ensure
    sufficient vectors are allocated for both NQ0/aux and main rings.
  - Changed CPU affinity hint failure from a fatal error to a warning.
  - Added robust NULL pointer and safety checks in ring allocation and
    cleanup paths to prevent potential kernel crashes on allocation failures.

v1: https://lore.kernel.org/all/20260901191728.643212-1-bhargava.marreddy@xxxxxxxxxxxx/

Bhargava Marreddy (6):
  bnge: Extract bnapi allocation and cleanup into helpers
  bnge: Extract per-NQ ring allocation and init helpers
  bnge: Move bnapi and ring_grp allocation to probe/remove
  bnge: Drop obsolete bn->bnapi NULL checks in open/close paths
  bnge: Quiesce NQ0 around ring teardown in bnge_free_core()
  bnge: Create NQ0 during probe and keep active across open/close

 .../net/ethernet/broadcom/bnge/bnge_ethtool.c |   2 +-
 .../net/ethernet/broadcom/bnge/bnge_netdev.c  | 514 ++++++++++++++----
 .../net/ethernet/broadcom/bnge/bnge_netdev.h  |  11 +
 .../net/ethernet/broadcom/bnge/bnge_resc.c    |   2 +-
 .../net/ethernet/broadcom/bnge/bnge_rmem.c    |  26 +-
 .../net/ethernet/broadcom/bnge/bnge_rmem.h    |   4 +-
 .../net/ethernet/broadcom/bnge/bnge_txrx.c    |  15 +
 7 files changed, 470 insertions(+), 104 deletions(-)

-- 
2.47.3