[PATCH v4] ath11k: add wait operation for tx management packets for flush from mac80211

[Kalle Valo]

Wen Gong <quic_wgong at quicinc.com> wrote:

> In ath11k, tx of management packet is doing in a work queue. Sometimes
> the workqueue does not finish tx immediately, then it lead after the next
> step of vdev delete finished, it start to send the management packet to
> firmware and lead firmware crash.
> 
> ieee80211_set_disassoc() have logic of ieee80211_flush_queues() after
> it send_deauth_disassoc() to ath11k, its purpose is make sure the
> deauth was actually sent, so it need to change ath11k to match the
> purpose of mac80211.
> 
> To address these issue wait for tx mgmt as well as tx data packets.
> 
> dmesg log of connect/disconnect to AP:
> [  307.522226] wls1: authenticate with 62:66:e4:e9:6a:a9
> [  307.586565] wls1: send auth to 62:66:e4:e9:6a:a9 (try 1/3)
> [  307.586581] ath11k_pci 0000:05:00.0: mac tx mgmt frame, buf id 0
> [  307.586922] ath11k_pci 0000:05:00.0: mac tx mgmt frame, vdev_id 0
> [  307.590179] ath11k_pci 0000:05:00.0: wmi mgmt tx comp pending 0 desc id 0
> [  307.590181] ath11k_pci 0000:05:00.0: mgmt tx compl ev pdev_id 2, desc_id 0, status 0
> [  307.598699] wls1: authenticated
> [  307.599483] wls1: associate with 62:66:e4:e9:6a:a9 (try 1/3)
> [  307.599506] ath11k_pci 0000:05:00.0: mac tx mgmt frame, buf id 0
> [  307.599519] ath11k_pci 0000:05:00.0: mac tx mgmt frame, vdev_id 0
> [  307.603059] ath11k_pci 0000:05:00.0: wmi mgmt tx comp pending 0 desc id 0
> [  307.603063] ath11k_pci 0000:05:00.0: mgmt tx compl ev pdev_id 2, desc_id 0, status 0
> [  307.637105] wls1: associated
> [  317.365239] wls1: deauthenticating from 62:66:e4:e9:6a:a9 by local choice (Reason: 3=DEAUTH_LEAVING)
> [  317.368104] ath11k_pci 0000:05:00.0: mac tx mgmt frame, buf id 0
> [  317.372622] ath11k_pci 0000:05:00.0: mac tx mgmt frame, vdev_id 0
> [  317.378320] ath11k_pci 0000:05:00.0: wmi mgmt tx comp pending 0 desc id 0
> [  317.378330] ath11k_pci 0000:05:00.0: mgmt tx compl ev pdev_id 2, desc_id 0, status 0
> [  317.378359] ath11k_pci 0000:05:00.0: mac mgmt tx flush mgmt pending 0
> [  317.421066] ath11k_pci 0000:05:00.0: mac mgmt tx flush mgmt pending 0
> [  317.421427] ath11k_pci 0000:05:00.0: mac remove interface (vdev 0)
> 
> Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01230-QCAHSTSWPLZ_V2_TO_X86-1
> Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1
> 
> Signed-off-by: Wen Gong <quic_wgong at quicinc.com>
> Signed-off-by: Kalle Valo <quic_kvalo at quicinc.com>

Patch applied to ath-next branch of ath.git, thanks.

dddaa64d0af3 ath11k: add wait operation for tx management packets for flush from mac80211

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20211202063705.14321-1-quic_wgong@quicinc.com/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches