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Wed, 4 Oct 2023 17:29:03 +0000 From: =?utf-8?b?SsOpcsO0bWUgUG91aWxsZXI=?= To: Kalle Valo Cc: linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?b?SsOpcsO0bWUgUG91aWxsZXI=?= Subject: [PATCH v3 6/8] wifi: wfx: scan_lock is global to the device Date: Wed, 4 Oct 2023 19:28:41 +0200 Message-Id: <20231004172843.195332-7-jerome.pouiller@silabs.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231004172843.195332-1-jerome.pouiller@silabs.com> References: <20231004172843.195332-1-jerome.pouiller@silabs.com> X-ClientProxiedBy: DS7PR03CA0305.namprd03.prod.outlook.com (2603:10b6:8:2b::25) To IA1PR11MB7773.namprd11.prod.outlook.com (2603:10b6:208:3f0::21) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: IA1PR11MB7773:EE_|PH7PR11MB5982:EE_ X-MS-Office365-Filtering-Correlation-Id: d599b826-ab11-4ed4-bf1e-08dbc4ff675d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; 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However, concurrent scan on vifs is explicitly prohibited by the device. Currently, scan_lock is associated with a vif but it is always locked with conf_mutex (there is a case where conf_mutex is not associated to scan_lock but scan_lock is tested on all interfaces). So concurrent scan on vifs cannot happen. So, this patch relocate scan_lock to the device and simplify the code. Signed-off-by: Jérôme Pouiller --- drivers/net/wireless/silabs/wfx/main.c | 2 ++ drivers/net/wireless/silabs/wfx/scan.c | 4 ++-- drivers/net/wireless/silabs/wfx/sta.c | 11 +++-------- drivers/net/wireless/silabs/wfx/wfx.h | 3 +-- 4 files changed, 8 insertions(+), 12 deletions(-) diff --git a/drivers/net/wireless/silabs/wfx/main.c b/drivers/net/wireless/silabs/wfx/main.c index ede822d771aaf..4bf16bceb0bbc 100644 --- a/drivers/net/wireless/silabs/wfx/main.c +++ b/drivers/net/wireless/silabs/wfx/main.c @@ -246,6 +246,7 @@ static void wfx_free_common(void *data) mutex_destroy(&wdev->tx_power_loop_info_lock); mutex_destroy(&wdev->rx_stats_lock); + mutex_destroy(&wdev->scan_lock); mutex_destroy(&wdev->conf_mutex); ieee80211_free_hw(wdev->hw); } @@ -314,6 +315,7 @@ struct wfx_dev *wfx_init_common(struct device *dev, const struct wfx_platform_da gpiod_set_consumer_name(wdev->pdata.gpio_wakeup, "wfx wakeup"); mutex_init(&wdev->conf_mutex); + mutex_init(&wdev->scan_lock); mutex_init(&wdev->rx_stats_lock); mutex_init(&wdev->tx_power_loop_info_lock); init_completion(&wdev->firmware_ready); diff --git a/drivers/net/wireless/silabs/wfx/scan.c b/drivers/net/wireless/silabs/wfx/scan.c index 16f619ed22e00..d6f98035f6844 100644 --- a/drivers/net/wireless/silabs/wfx/scan.c +++ b/drivers/net/wireless/silabs/wfx/scan.c @@ -95,7 +95,7 @@ void wfx_hw_scan_work(struct work_struct *work) int chan_cur, ret, err; mutex_lock(&wvif->wdev->conf_mutex); - mutex_lock(&wvif->scan_lock); + mutex_lock(&wvif->wdev->scan_lock); if (wvif->join_in_progress) { dev_info(wvif->wdev->dev, "abort in-progress REQ_JOIN"); wfx_reset(wvif); @@ -116,7 +116,7 @@ void wfx_hw_scan_work(struct work_struct *work) ret = -ETIMEDOUT; } } while (ret >= 0 && chan_cur < hw_req->req.n_channels); - mutex_unlock(&wvif->scan_lock); + mutex_unlock(&wvif->wdev->scan_lock); mutex_unlock(&wvif->wdev->conf_mutex); wfx_ieee80211_scan_completed_compat(wvif->wdev->hw, ret < 0); } diff --git a/drivers/net/wireless/silabs/wfx/sta.c b/drivers/net/wireless/silabs/wfx/sta.c index cb03a5cf7ffa4..8533bad6caeae 100644 --- a/drivers/net/wireless/silabs/wfx/sta.c +++ b/drivers/net/wireless/silabs/wfx/sta.c @@ -97,7 +97,7 @@ void wfx_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, FIF_PROBE_REQ | FIF_PSPOLL; /* Filters are ignored during the scan. No frames are filtered. */ - if (mutex_is_locked(&wvif->scan_lock)) + if (mutex_is_locked(&wdev->scan_lock)) return; mutex_lock(&wdev->conf_mutex); @@ -621,18 +621,14 @@ int wfx_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, bool set) void wfx_suspend_resume_mc(struct wfx_vif *wvif, enum sta_notify_cmd notify_cmd) { - struct wfx_vif *wvif_it; - if (notify_cmd != STA_NOTIFY_AWAKE) return; /* Device won't be able to honor CAB if a scan is in progress on any interface. Prefer to * skip this DTIM and wait for the next one. */ - wvif_it = NULL; - while ((wvif_it = wvif_iterate(wvif->wdev, wvif_it)) != NULL) - if (mutex_is_locked(&wvif_it->scan_lock)) - return; + if (mutex_is_locked(&wvif->wdev->scan_lock)) + return; if (!wfx_tx_queues_has_cab(wvif) || wvif->after_dtim_tx_allowed) dev_warn(wvif->wdev->dev, "incorrect sequence (%d CAB in queue)", @@ -730,7 +726,6 @@ int wfx_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) complete(&wvif->set_pm_mode_complete); INIT_WORK(&wvif->tx_policy_upload_work, wfx_tx_policy_upload_work); - mutex_init(&wvif->scan_lock); init_completion(&wvif->scan_complete); INIT_WORK(&wvif->scan_work, wfx_hw_scan_work); diff --git a/drivers/net/wireless/silabs/wfx/wfx.h b/drivers/net/wireless/silabs/wfx/wfx.h index 13ba84b3b2c33..a41b2c35fa415 100644 --- a/drivers/net/wireless/silabs/wfx/wfx.h +++ b/drivers/net/wireless/silabs/wfx/wfx.h @@ -43,6 +43,7 @@ struct wfx_dev { struct delayed_work cooling_timeout_work; bool poll_irq; bool chip_frozen; + struct mutex scan_lock; struct mutex conf_mutex; struct wfx_hif_cmd hif_cmd; @@ -80,8 +81,6 @@ struct wfx_vif { unsigned long uapsd_mask; - /* avoid some operations in parallel with scan */ - struct mutex scan_lock; struct work_struct scan_work; struct completion scan_complete; int scan_nb_chan_done;