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Thu, 13 Mar 2025 03:10:31 -0700 (PDT) Message-ID: <187c8be7-23ef-4bcb-9ac1-cf1882fe3e62@8devices.com> Date: Thu, 13 Mar 2025 12:10:29 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH ath-next] wifi: ath12k: limit WMI_SCAN_CHAN_LIST_CMDID argument size To: Vasanthakumar Thiagarajan , ath12k@lists.infradead.org Cc: Johannes Berg , Jeff Johnson , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org References: <20250310-limit-wmi-chanlist-v1-1-8f0fb45459a7@8devices.com> Content-Language: en-US From: Mantas In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2025-03-13 11:45, Vasanthakumar Thiagarajan wrote: > > > On 3/10/2025 6:58 PM, Mantas Pucka wrote: >> When using BDF with both 5GHz and 6GHz bands enabled on QCN9274, >> interface >> fails to start. It happens because FW fails to process >> WMI_SCAN_CHAN_LIST_CMDID with argument size >2048, resulting in a >> command >> timeout. The current code allows splitting channel list across >> multiple WMI >> commands but uses WMI max_msg_len (4096) as chunk size, which is >> still too > > Did you have any private changes to increase the message_len from current > 2048 ot 4096 bytes? As mentioned in a reply for your other patch, > multi-band > in qcn9274 requires additional changes in driver, only scan mode is > supported > even with those changes. > No private changes, using unmodified FW from: https://git.codelinaro.org/clo/ath-firmware/ath12k-firmware/-/tree/main/QCN9274/hw2.0/1.4.1/WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1 max_msg_len comes from FW initialization message: ath12k_htc_connect_service max_msg_len=0 flags_len=0x0 assigned_eid=0 boot htc service 'Control' ul pipe 0 dl pipe 1 eid 0 ready ath12k_htc_connect_service max_msg_len=2040 flags_len=0x7f80100 assigned_eid=1 boot htc service 'HTT Data' ul pipe 4 dl pipe 1 eid 1 ready ath12k_htc_connect_service max_msg_len=4088 flags_len=0xff80200 assigned_eid=2 boot htc service 'WMI' ul pipe 3 dl pipe 2 eid 2 ready Is support for multi-band AP/STA limited by FW? AFAIK it works with proprietary driver. Mantas