[PATCH v4 0/8] wifi: brcm80211: performance and stability fixes

This series fixes several performance bottlenecks and correctness
issues in both brcmfmac (PCIe/SDIO) and brcmsmac drivers.

Changes since v3:
 - cfg80211.c: Removed spurious double blank line flagged by
   checkpatch --strict.
 - All commit messages rewritten to follow kernel standards:
   explain the problem symptom first, then the solution, add
   Fixes: tags where applicable, wrap lines at 72 chars.
 - pcie.c: Added Fixes: tag referencing the original PCIe commit.

Changes since v2:
 - core.c: Add skb_cow_head() before skb_push() to prevent a
   kernel panic when skb arrives with zero headroom.
 - cfg80211.c: Fix PMKID V2 shadow counter corruption bug.

Changes since v1:
 - Correct author and Signed-off-by to [email protected].

Patch overview:
 1/8 flowring: Replace O(N) blocked-ring scan with atomic counter.
 2/8 sdio: Coalesce N+1 sdio_claim_host() pairs in rxglom path.
 3/8 core: Fix skb_push() panic; populate radiotap RSSI field.
 4/8 cfg80211: Implement PMKID_V2; fix shadow counter overwrite;
     replace mdelay() with usleep_range().
 5/8 msgbuf: Fix silent TX stall; increase NR_TX_PKTIDS to 4096.
 6/8 pcie: Replace msleep() with usleep_range() + backoff.
 7/8 fwsignal: Document safe no-op for duplicate MAC handle ADD.
 8/8 brcmsmac/ampdu: Reference IEEE 802.11n TID requirement.

Shivesh (8):
  wifi: brcmfmac: flowring: replace O(N) blocked-ring scan with atomic
    counter
  wifi: brcmfmac: sdio: coalesce sdio_claim_host calls in rxglom path
  wifi: brcmfmac: core: fix missing headroom check and populate radiotap
    RSSI
  wifi: brcmfmac: cfg80211: implement PMKID_V2 and fix brcmf_delay
    busy-wait
  wifi: brcmfmac: msgbuf: fix TX stall and tune buffer/threshold
    constants
  wifi: brcmfmac: pcie: replace msleep polling with usleep_range and
    backoff
  wifi: brcmfmac: fwsignal: document safe no-op for duplicate MAC handle
    ADD
  wifi: brcmsmac: ampdu: document IEEE 802.11n TID requirement

 .../broadcom/brcm80211/brcmfmac/cfg80211.c    | 122 ++++++++++++++++--
 .../broadcom/brcm80211/brcmfmac/cfg80211.h    |   4 +-
 .../broadcom/brcm80211/brcmfmac/core.c        |  44 ++++---
 .../broadcom/brcm80211/brcmfmac/flowring.c    |  65 +++++++---
 .../broadcom/brcm80211/brcmfmac/flowring.h    |  18 +++
 .../broadcom/brcm80211/brcmfmac/fwsignal.c    |   4 +-
 .../broadcom/brcm80211/brcmfmac/msgbuf.c      |  69 ++++++++--
 .../broadcom/brcm80211/brcmfmac/pcie.c        |  66 ++++++++--
 .../broadcom/brcm80211/brcmfmac/sdio.c        |  62 +++++----
 .../broadcom/brcm80211/brcmsmac/ampdu.c       |  11 +-
 10 files changed, 374 insertions(+), 91 deletions(-)


base-commit: 5e0bcb4920bcb9e0ef6c03a91730fe45f643f3a4
-- 
2.53.0