[PATCH] ath10k: fix scan abort when duration is set for hw scan

[Kalle Valo]

Wen Gong <quic_wgong at quicinc.com> wrote:

> When request scan with duration 120ms on channel 1, it failed with
> scan abort easily. Because scan_timeout is set to 130ms for the scan
> in ath10k_hw_scan(), and timed out before scan complete, so lead
> scan abort.
> 
> failed log of ath10k:
> 2021-04-14T14:43:29.936058Z DEBUG kernel: [67384.594846] ath10k_sdio mmc1:0001:1: wmi tlv start scan
> 2021-04-14T14:43:29.937896Z DEBUG kernel: [67384.595820] ath10k_sdio mmc1:0001:1: scan event started type 1 reason 7 freq 2437 req_id 40961 scan_id 40960 vdev_id 0 state starting (1)
> 2021-04-14T14:43:29.938357Z DEBUG kernel: [67384.596761] ath10k_sdio mmc1:0001:1: scan event bss channel type 4 reason 7 freq 2437 req_id 40961 scan_id 40960 vdev_id 0 state running (2)
> 2021-04-14T14:43:29.992497Z DEBUG kernel: [67384.651013] ath10k_sdio mmc1:0001:1: scan event foreign channel type 8 reason 7 freq 2412 req_id 40961 scan_id 40960 vdev_id 0 state running (2)
> 2021-04-14T14:43:30.063530Z DEBUG kernel: [67384.722139] ath10k_sdio mmc1:0001:1: wmi tlv stop scan
> 2021-04-14T14:43:30.066592Z DEBUG kernel: [67384.724403] ath10k_sdio mmc1:0001:1: scan event completed [cancelled] type 2 reason 1 freq 2412 req_id 40961 scan_id 40960 vdev_id 0 state aborting (3)
> 
> failed log of wpa_supplicant:
> 2021-04-14T14:43:29.981842Z DEBUG wpa_supplicant[887]: wlan0: nl80211: scan request
> 2021-04-14T14:43:29.981988Z DEBUG wpa_supplicant[887]: nl80211: Passive scan requested
> 2021-04-14T14:43:29.982202Z DEBUG wpa_supplicant[887]: nl80211: Add NL80211_SCAN_FLAG_FLUSH
> 2021-04-14T14:43:29.982339Z DEBUG wpa_supplicant[887]: Scan requested (ret=0) - scan timeout 30 seconds
> 2021-04-14T14:43:29.982491Z DEBUG wpa_supplicant[887]: nl80211: Drv Event 33 (NL80211_CMD_TRIGGER_SCAN) received for wlan0
> 2021-04-14T14:43:29.982629Z DEBUG wpa_supplicant[887]: wlan0: nl80211: Scan trigger
> 2021-04-14T14:43:29.982779Z DEBUG wpa_supplicant[887]: wlan0: Event SCAN_STARTED (47) received
> 2021-04-14T14:43:29.982920Z DEBUG wpa_supplicant[887]: wlan0: Own scan request started a scan in 0.000175 seconds
> 2021-04-14T14:43:30.082401Z DEBUG wpa_supplicant[887]: nl80211: Drv Event 35 (NL80211_CMD_SCAN_ABORTED) received for wlan0
> 2021-04-14T14:43:30.082704Z DEBUG wpa_supplicant[887]: wlan0: nl80211: Scan aborted
> 2021-04-14T14:43:30.082905Z DEBUG wpa_supplicant[887]: nl80211: Scan included frequencies: 2412
> 2021-04-14T14:43:30.083123Z DEBUG wpa_supplicant[887]: wlan0: Event SCAN_RESULTS (3) received
> 2021-04-14T14:43:30.083310Z DEBUG wpa_supplicant[887]: wlan0: Scan completed in 0.128655 seconds
> 
> This is to increase the scan_timeout with 200ms for this situation,
> then scan will not timed out for this situation.
> 
> Tested-on: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00049
> 
> 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.

5a10537cbfc5 ath10k: fix scan abort when duration is set for hw scan

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20211026025902.26621-1-quic_wgong@quicinc.com/

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