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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@quicinc.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/20211027093825.12167-1-quic_wgong@quicinc.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.