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| author | Wen Gong <quic_wgong@quicinc.com> | 2022-05-05 06:46:36 +0300 |
|---|---|---|
| committer | Kalle Valo <quic_kvalo@quicinc.com> | 2022-05-09 14:54:37 +0300 |
| commit | 9497b7880ffd71fcbd469970f6ef45bb55877bfd (patch) | |
| tree | a12885617afd664e910d81e7adc929120d3c5cbe /drivers/net/wireless/ath/ath11k/reg.c | |
| parent | 22cc687326e049fe294da118d9a067538c0066cb (diff) | |
| download | linux-9497b7880ffd71fcbd469970f6ef45bb55877bfd.tar.xz | |
ath11k: reset 11d state in process of recovery
When doing simulate_fw_crash operation periodically with a short interval
time such as 10 seconds, it is easy happened WMI command timed out for
WMI_SCAN_CHAN_LIST_CMDID in ath11k_reg_update_chan_list().
log:
[42287.610053] ath11k_pci 0000:01:00.0: wmi command 12291 timeout
[42287.610064] ath11k_pci 0000:01:00.0: failed to send WMI_SCAN_CHAN_LIST cmd
[42287.610073] ath11k_pci 0000:01:00.0: failed to perform regd update : -11
Note that this issue does not occur with a longer interval such as 20 seconds.
The reason the issue occurs with a shorter interval is the following steps:
1) Upon initial boot, or after device recovery, the initial hw scan plus
the 11d scan will run, and when 6 GHz support is present, these scans
can take up to 12 seconds to complete, so ath11k_reg_update_chan_list()
is still waiting the completion of ar->completed_11d_scan.
2) If a simulate_fw_crash operation is received during this time, those
scans do not complete, and ath11k_core_pre_reconfigure_recovery()
complete the ar->completed_11d_scan, then ath11k_reg_update_chan_list()
wakeup and start to send WMI_SCAN_CHAN_LIST_CMDID, but firmware is crashed
at this moment, so wmi timed out occur.
To address this issue, reset the 11d state during device recovery so that
WMI_SCAN_CHAN_LIST_CMDID does not timed out for short interval time such
as 10 seconds.
Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3
Fixes: 1f682dc9fb37 ("ath11k: reduce the wait time of 11d scan and hw scan while add interface")
Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220505034636.29582-1-quic_wgong@quicinc.com
Diffstat (limited to 'drivers/net/wireless/ath/ath11k/reg.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath11k/reg.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath11k/reg.c b/drivers/net/wireless/ath/ath11k/reg.c index 79ac2142317a..7ee3ff69dfc8 100644 --- a/drivers/net/wireless/ath/ath11k/reg.c +++ b/drivers/net/wireless/ath/ath11k/reg.c @@ -139,6 +139,9 @@ int ath11k_reg_update_chan_list(struct ath11k *ar, bool wait) "reg hw scan wait left time %d\n", left); } + if (ar->state == ATH11K_STATE_RESTARTING) + return 0; + bands = hw->wiphy->bands; for (band = 0; band < NUM_NL80211_BANDS; band++) { if (!bands[band]) |