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Mon, 05 Oct 2026 00:22:11 -0700 (PDT) Received: from deb05.proceq.com ([213.160.61.66]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48c622affadsm1642847f8f.40.2026.10.05.00.22.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Oct 2026 00:22:10 -0700 (PDT) From: Mehmet Fide To: =?UTF-8?q?Toke=20H=C3=B8iland-J=C3=B8rgensen?= Cc: Jeff Johnson , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, mehmet.fide@screeningeagle.com Subject: [PATCH ath-current 0/2] wifi: ath9k_htc: start ANI for an AP interface at the right time Date: Mon, 5 Oct 2026 09:22:07 +0200 Message-ID: <20261005072209.4101009-1-mehmet.fide@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Mehmet Fide ath9k_htc starts ANI for an AP interface in add_interface, before a channel and the calibration data exist. When the bring-up stalls between add_interface and the first channel configuration, the first ANI tick dereferences a NULL ah->caldata and the device does not recover. Patch 1 removes that start. Patch 2 starts ANI once the interface beacons, which is where ath9k_htc_vif_reconfig() already re-arms it after a channel change; without it ANI and the periodic calibration never ran during a normal AP start. Tested with AR9271 on 6.18.48 and on a 6.12 product kernel: the oops reproduces on every start with a 500 ms delay after add_interface and is gone with the series; an hour as an AP, station mode, a channel switch, hostapd disable/enable and a restart are clean. Mehmet Fide (2): wifi: ath9k_htc: do not start ANI before the first channel is set wifi: ath9k_htc: start ANI when an AP interface begins to beacon drivers/net/wireless/ath/ath9k/htc_drv_main.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) -- 2.55.0