From: Joseph Gates jgates@squareup.com
stable inclusion from stable-5.10.67 commit 646870ad8e56ff25ca38682b18171e07ddf673d5 bugzilla: 182619 https://gitee.com/openeuler/kernel/issues/I4EWO7
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit d195d7aac09bddabc2c8326fb02fcec2b0a2de02 upstream.
If the operating channel is the first in the scan list, it was seen that a finish scan request would be sent before a start scan request was sent, causing the firmware to fail all future scans. Track the current channel being scanned to avoid requesting the scan finish before it starts.
Cc: stable@vger.kernel.org Fixes: 5973a2947430 ("wcn36xx: Fix software-driven scan") Signed-off-by: Joseph Gates jgates@squareup.com Signed-off-by: Loic Poulain loic.poulain@linaro.org Signed-off-by: Kalle Valo kvalo@codeaurora.org Link: https://lore.kernel.org/r/1629286303-13179-1-git-send-email-loic.poulain@lin... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/net/wireless/ath/wcn36xx/main.c | 5 ++++- drivers/net/wireless/ath/wcn36xx/wcn36xx.h | 1 + 2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c index 9f8e44210e89..6bed61953542 100644 --- a/drivers/net/wireless/ath/wcn36xx/main.c +++ b/drivers/net/wireless/ath/wcn36xx/main.c @@ -405,13 +405,14 @@ static int wcn36xx_config(struct ieee80211_hw *hw, u32 changed) wcn36xx_dbg(WCN36XX_DBG_MAC, "wcn36xx_config channel switch=%d\n", ch);
- if (wcn->sw_scan_opchannel == ch) { + if (wcn->sw_scan_opchannel == ch && wcn->sw_scan_channel) { /* If channel is the initial operating channel, we may * want to receive/transmit regular data packets, then * simply stop the scan session and exit PS mode. */ wcn36xx_smd_finish_scan(wcn, HAL_SYS_MODE_SCAN, wcn->sw_scan_vif); + wcn->sw_scan_channel = 0; } else if (wcn->sw_scan) { /* A scan is ongoing, do not change the operating * channel, but start a scan session on the channel. @@ -419,6 +420,7 @@ static int wcn36xx_config(struct ieee80211_hw *hw, u32 changed) wcn36xx_smd_init_scan(wcn, HAL_SYS_MODE_SCAN, wcn->sw_scan_vif); wcn36xx_smd_start_scan(wcn, ch); + wcn->sw_scan_channel = ch; } else { wcn36xx_change_opchannel(wcn, ch); } @@ -699,6 +701,7 @@ static void wcn36xx_sw_scan_start(struct ieee80211_hw *hw,
wcn->sw_scan = true; wcn->sw_scan_vif = vif; + wcn->sw_scan_channel = 0; if (vif_priv->sta_assoc) wcn->sw_scan_opchannel = WCN36XX_HW_CHANNEL(wcn); else diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h index 71fa9992b118..d0fcce86903a 100644 --- a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h +++ b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h @@ -232,6 +232,7 @@ struct wcn36xx { struct cfg80211_scan_request *scan_req; bool sw_scan; u8 sw_scan_opchannel; + u8 sw_scan_channel; struct ieee80211_vif *sw_scan_vif; struct mutex scan_lock; bool scan_aborted;