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[68.111.223.48]) by smtp.gmail.com with ESMTPSA id m6sm52390574pfm.22.2017.02.01.15.26.32 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 01 Feb 2017 15:26:33 -0800 (PST) From: Bjorn Andersson To: Eugene Krasnikov , Kalle Valo Cc: wcn36xx@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Mart Raudsepp Subject: [PATCH] wcn36xx: Implement cancel_hw_scan Date: Wed, 1 Feb 2017 07:27:47 -0800 Message-Id: <20170201152747.838-1-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.11.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In the even that the wcn36xx interface is brought down while a hw_scan is active we must abort and wait for the ongoing scan to signal completion to mac80211. Reported-by: Mart Raudsepp Fixes: 886039036c20 ("wcn36xx: Implement firmware assisted scan") Signed-off-by: Bjorn Andersson --- drivers/net/wireless/ath/wcn36xx/main.c | 25 ++++++++++++++++++++++++- drivers/net/wireless/ath/wcn36xx/wcn36xx.h | 1 + 2 files changed, 25 insertions(+), 1 deletion(-) -- 2.11.0 diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c index a24edf33be93..bb7110f7fc86 100644 --- a/drivers/net/wireless/ath/wcn36xx/main.c +++ b/drivers/net/wireless/ath/wcn36xx/main.c @@ -574,6 +574,7 @@ static void wcn36xx_hw_scan_worker(struct work_struct *work) struct cfg80211_scan_request *req = wcn->scan_req; u8 channels[WCN36XX_HAL_PNO_MAX_NETW_CHANNELS_EX]; struct cfg80211_scan_info scan_info = {}; + bool aborted = false; int i; wcn36xx_dbg(WCN36XX_DBG_MAC, "mac80211 scan %d channels worker\n", req->n_channels); @@ -585,6 +586,13 @@ static void wcn36xx_hw_scan_worker(struct work_struct *work) wcn36xx_smd_init_scan(wcn, HAL_SYS_MODE_SCAN); for (i = 0; i < req->n_channels; i++) { + mutex_lock(&wcn->scan_lock); + aborted = wcn->scan_aborted; + mutex_unlock(&wcn->scan_lock); + + if (aborted) + break; + wcn->scan_freq = req->channels[i]->center_freq; wcn->scan_band = req->channels[i]->band; @@ -596,7 +604,7 @@ static void wcn36xx_hw_scan_worker(struct work_struct *work) } wcn36xx_smd_finish_scan(wcn, HAL_SYS_MODE_SCAN); - scan_info.aborted = false; + scan_info.aborted = aborted; ieee80211_scan_completed(wcn->hw, &scan_info); mutex_lock(&wcn->scan_lock); @@ -615,6 +623,8 @@ static int wcn36xx_hw_scan(struct ieee80211_hw *hw, mutex_unlock(&wcn->scan_lock); return -EBUSY; } + + wcn->scan_aborted = false; wcn->scan_req = &hw_req->req; mutex_unlock(&wcn->scan_lock); @@ -623,6 +633,18 @@ static int wcn36xx_hw_scan(struct ieee80211_hw *hw, return 0; } +static void wcn36xx_cancel_hw_scan(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) +{ + struct wcn36xx *wcn = hw->priv; + + mutex_lock(&wcn->scan_lock); + wcn->scan_aborted = true; + mutex_unlock(&wcn->scan_lock); + + cancel_work_sync(&wcn->scan_work); +} + static void wcn36xx_update_allowed_rates(struct ieee80211_sta *sta, enum nl80211_band band) { @@ -1034,6 +1056,7 @@ static const struct ieee80211_ops wcn36xx_ops = { .tx = wcn36xx_tx, .set_key = wcn36xx_set_key, .hw_scan = wcn36xx_hw_scan, + .cancel_hw_scan = wcn36xx_cancel_hw_scan, .bss_info_changed = wcn36xx_bss_info_changed, .set_rts_threshold = wcn36xx_set_rts_threshold, .sta_add = wcn36xx_sta_add, diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h index 571e9f76da7e..b52b4da9a967 100644 --- a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h +++ b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h @@ -220,6 +220,7 @@ struct wcn36xx { int scan_freq; int scan_band; struct mutex scan_lock; + bool scan_aborted; /* DXE channels */ struct wcn36xx_dxe_ch dxe_tx_l_ch; /* TX low */