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Wed, 05 Aug 2026 04:13:57 -0700 (PDT) X-Received: by 2002:a05:6a20:4309:b0:3be:b0b3:3962 with SMTP id adf61e73a8af0-3cb85dee5ecmr6544741637.9.1785928437068; Wed, 05 Aug 2026 04:13:57 -0700 (PDT) Received: from [10.152.199.23] ([202.46.23.19]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-31586447d52sm14481339eec.12.2026.08.05.04.13.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 05 Aug 2026 04:13:56 -0700 (PDT) Message-ID: <6c8b8587-8a7d-4e57-81c8-dbd84aa458d1@oss.qualcomm.com> Date: Wed, 5 Aug 2026 16:43:51 +0530 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH ath-next v2 0/2] wifi: ath11k: fix SoC reboot on firmware crash on AHB To: Julius Bairaktaris , jjohnson@kernel.org Cc: ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, baochen.qiang@oss.qualcomm.com, vasanthakumar.thiagarajan@oss.qualcomm.com References: <20260726221908.104873-1-julius@bairaktaris.de> From: Rameshkumar Sundaram Content-Language: en-US In-Reply-To: <20260726221908.104873-1-julius@bairaktaris.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODA1MDA4OSBTYWx0ZWRfX4sjR1xq1gHj+ gvSemIWI2JWNb/jvgc6rAhrYklxmry/Q2lu1ZFz//G6btE/FRUMvyFbyCAIRFh3I1nAmwac5dIK B9dfwfOekkCZHRGbr39gUGAtpdzJGEhovdI22ZBaD5snMlnd51k3QjFotukc5kismjh0cgQPnMi dYpdXgTY0BhAkzCPSYnCv0hxisna7hKkfXX6iHyTv+OoXCQn3gIBBAImlKjpGZvoM+aaqahhFGT XMZR8F2NuYqyvkEWJj/M+aXNDFc3/jai5X88DuxABqnzJQbdSRiFNFyEy/lPOxbv6R1YZauUL0f UBigjXz9tZ7H6Ro7YIiGUgh8TDoOvi1hto5RGeyeOwMWSe1IGMGYBSaE6V8Zr/d9rwnF4csSamm r4ZancbIt9TiLWgzxw4xQ+IEfqLhD476oG9cwcarALmiZtowuJeAibM5J6qd2kU8UQL7lRku2Xy iJoOaIrfqyXinwkgWlA== X-Proofpoint-GUID: 4GJZADl0Gwiq-aDsQitfNTDVzaHoVYvo X-Authority-Analysis: v=2.4 cv=LsiiDHdc c=1 sm=1 tr=0 ts=6a731af6 cx=c_pps a=oF/VQ+ItUULfLr/lQ2/icg==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=hCEygx0HL4Tx5WVe8Q4A:9 a=QEXdDO2ut3YA:10 a=3WC7DwWrALyhR5TkjVHa:22 X-Proofpoint-ORIG-GUID: 4GJZADl0Gwiq-aDsQitfNTDVzaHoVYvo X-Proofpoint-Spam-Info: AW1haW4tMjYwODA1MDA4OSBTYWx0ZWRfX4wrno59HbxX/ YeHYHIdsNulv/cey10nQu0CDkJitVQGXlIzZ7dL9sb2qXOjPue2O9B3Zx88o+Sg76FQi9F7LiCu TIEjZXQJM7B6kLnEhf0Ig0KchkZtRD4= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-05_03,2026-08-04_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 impostorscore=0 suspectscore=0 clxscore=1015 malwarescore=0 priorityscore=1501 bulkscore=0 lowpriorityscore=0 adultscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608050089 On 7/27/2026 3:49 AM, Julius Bairaktaris wrote: > On IPQ8074 every firmware assert takes the whole SoC down. The DP NAPI > keeps polling while ath11k_core_reconfigure_on_crash() frees the data > path underneath it, and dereferences a ring the teardown has already > cleared. > > The interrupts used to be disabled at the top of that function. > commit d455e805de70 ("wifi: ath11k: rearrange IRQ enable/disable in reset path") > moved the disable into ath11k_core_reset(), which AHB parts never reach > on a real firmware crash: reset_work is queued only from mhi.c and from > the debugfs hw-restart handler. Patch 2 puts the disable back on the > crash path. Patch 1 is a prerequisite - the CE half of the quiesce is a > no-op on AHB today because the bus never implemented the hif ops. > > Reproduced and fixed on a Xiaomi AX3600 (IPQ8074 hw2.0), with no > out-of-tree modules loaded, using the debugfs simulate_fw_crash > 'assert' trigger: > > before: 2/2 asserts panic in ath11k_dp_rx_process_mon_status() and > reboot the SoC > after: 3/3 asserts recover, 5 firmware boots across a single 397 s > uptime, no panics, both radios stay up > > Note the debugfs 'hw-restart' trigger does not reproduce this, since it > goes through ath11k_core_reset() - the one path that still disables the > interrupts. Only a real firmware assert does. > > Patch 1 is by inspection: it makes ath11k_hif_ce_irq_disable() take > effect on AHB, which also fixes the existing call in > ath11k_core_reset(). I have not managed to trigger a CE-side crash on > its own, so if you would rather see that split out or dropped, say so. > > Changes in v2 (no functional change, review comments from Jeff on 2/2): > - separate the ath-specific Tested-on tag from the upstream tags with a > blank line > - use the standard kernel block comment style, with /* on its own line > > v1: https://lore.kernel.org/ath11k/20260725141757.1316877-1-julius@bairaktaris.de/ > > Julius Bairaktaris (2): > wifi: ath11k: implement CE interrupt enable/disable for AHB > wifi: ath11k: disable interrupts during firmware crash recovery > > drivers/net/wireless/ath/ath11k/ahb.c | 9 ++++++++- > drivers/net/wireless/ath/ath11k/core.c | 10 ++++++++++ > 2 files changed, 18 insertions(+), 1 deletion(-) > Reviewed-by: Rameshkumar Sundaram