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Fri, 31 Jul 2026 08:49:10 -0700 (PDT) Received: from Potato.tail66a299.ts.net ([171.76.83.76]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3153e045016sm11852510eec.19.2026.07.31.08.49.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 31 Jul 2026 08:49:10 -0700 (PDT) From: Shivesh X-Google-Original-From: Shivesh To: arend.vanspriel@broadcom.com Cc: linux-wireless@vger.kernel.org, brcm80211@lists.linux.dev, brcm80211-dev-list.pdl@broadcom.com, linux-kernel@vger.kernel.org, Shivesh Subject: [PATCH v3 0/8] wifi: brcm80211: performance and stability improvements Date: Fri, 31 Jul 2026 15:48:32 +0000 Message-ID: <20260731154901.1822-1-shivesh@example.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Shivesh This series addresses several performance bottlenecks and correctness issues in both brcmfmac (PCIe/SDIO) and brcmsmac drivers. Changes since v2: - core.c: Add skb_cow_head() check before skb_push() to prevent a kernel panic when the skb arrives with zero headroom in monitor mode receive path. - cfg80211.c: Fix a silent PMKID list corruption bug in brcmf_pmksa_v2_op. The shadow entry counter (npmk) was stored in list->length, which was then overwritten with the wire-format byte-length at the send: label. On subsequent calls, le16_to_cpu(list->length) would decode the byte- length as an entry count, silently corrupting the PMKID cache. Changes since v1: - Sent with correct author/Signed-off-by address (chanelshivesh@gmail.com). Patch overview: 1. flowring: Replace O(N) blocked-ring scan with an atomic per-interface counter, fixing a teardown counter leak that permanently stopped netif. 2. sdio: Coalesce N+1 separate sdio_claim_host/release pairs in the rxglom path into a single pair covering all hdparse calls. 3. core: Populate the radiotap header with RSSI from wlc_d11rxhdr in monitor mode, fixing missing signal strength in packet captures. Add skb_cow_head() to prevent panic on zero-headroom skbs. 4. cfg80211: Implement the PMKID_V2 set/del/flush paths for FILS fast-roaming support on firmware revision 12 devices. Fix the V2 shadow counter overwrite bug. Replace mdelay() busy-wait in brcmf_delay() with usleep_range(). 5. msgbuf: Increase NR_TX_PKTIDS (2048->4096) and TX flush thresholds (32/96->64/128). Fix silent TX stall under high load by using test_and_set_bit to guarantee worker scheduling. 6. pcie: Replace fixed msleep(10) mailbox polling with usleep_range exponential backoff. Replace msleep(50) IRQ teardown polling with usleep_range for faster teardown. 7. fwsignal: Document that a duplicate MAC handle ADD is a safe no-op. 8. brcmsmac/ampdu: Clarify IEEE 802.11n TID compliance comment. Shivesh (8): wifi: brcmfmac: flowring: replace O(N) loop with atomic counter wifi: brcmfmac: sdio: coalesce host locks in rx path wifi: brcmfmac: core: populate radiotap header with RSSI wifi: brcmfmac: cfg80211: implement PMKID_V2 and fix delay busy-wait wifi: brcmfmac: msgbuf: tune thresholds and optimize sleep latency wifi: brcmfmac: pcie: optimize latency and irq teardown wifi: brcmfmac: fwsignal: safe no-op on duplicate MAC add wifi: brcmsmac: ampdu: clarify standard compliance on QoS change .../broadcom/brcm80211/brcmfmac/cfg80211.c | 123 ++++++++++++++++-- .../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, 375 insertions(+), 91 deletions(-) base-commit: 5e0bcb4920bcb9e0ef6c03a91730fe45f643f3a4 -- 2.53.0