[PATCH] ath11k: move peer delete after vdev stop of station for QCA6390 and WCN6855

[Kalle Valo]

Wen Gong <quic_wgong at quicinc.com> wrote:

> When station connect to AP, the wmi command sequence is:
> 
> peer_create->vdev_start->vdev_up
> 
> and sequence of station disconnect fo AP is:
> 
> peer_delete->vdev_down->vdev_stop
> 
> The sequence of disconnect is not opposite of connect, it caused firmware
> crash when it handle wmi vdev stop cmd when the AP is support TWT of
> 802.11 ax, because firmware need access the bss peer for vdev stop cmd.
> 
> [  390.438564] ath11k_pci 0000:05:00.0: wmi cmd send 0x6001 ret 0
> [  390.438567] ath11k_pci 0000:05:00.0: WMI peer create vdev_id 0 peer_addr c4:04:15:3b:e0:39
> [  390.472724] ath11k_pci 0000:05:00.0: mac vdev 0 start center_freq 2437 phymode 11ax-he20-2g
> [  390.472731] ath11k_pci 0000:05:00.0: wmi cmd send 0x5003 ret 0
> [  390.560849] ath11k_pci 0000:05:00.0: wmi cmd send 0x5005 ret 0
> [  390.560850] ath11k_pci 0000:05:00.0: WMI mgmt vdev up id 0x0 assoc id 1 bssid c4:04:15:3b:e0:39
> 
> [  399.432896] ath11k_pci 0000:05:00.0: WMI peer delete vdev_id 0 peer_addr c4:04:15:3b:e0:39
> [  399.432902] ath11k_pci 0000:05:00.0: wmi cmd send 0x6002 ret 0
> [  399.441380] ath11k_pci 0000:05:00.0: wmi cmd send 0x5007 ret 0
> [  399.441381] ath11k_pci 0000:05:00.0: WMI vdev down id 0x0
> [  399.454681] ath11k_pci 0000:05:00.0: wmi cmd send 0x5006 ret 0
> [  399.454682] ath11k_pci 0000:05:00.0: WMI vdev stop id 0x0
> 
> The opposite sequence of disconnect should be:
> 
> vdev_down->vdev_stop->peer_delete
> 
> This patch change the sequence of disconnect for station as above
> opposite sequence for QCA6390, firmware not crash again with this patch.
> 
> Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1
> 
> Signed-off-by: Wen Gong <quic_wgong at quicinc.com>
> Signed-off-by: Kalle Valo <kvalo at codeaurora.org>

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

b4a0f54156ac ath11k: move peer delete after vdev stop of station for QCA6390 and WCN6855

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20211027093825.12167-1-quic_wgong@quicinc.com/

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