From patchwork Mon Jan 15 14:56:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Alexis_Lothor=C3=A9_=28eBPF_Foundation=29?= X-Patchwork-Id: 13519756 X-Patchwork-Delegate: kvalo@adurom.com Received: from mslow1.mail.gandi.net (mslow1.mail.gandi.net [217.70.178.240]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 06F9118034; Mon, 15 Jan 2024 15:06:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="GweDVpgJ" Received: from relay9-d.mail.gandi.net (unknown [217.70.183.199]) by mslow1.mail.gandi.net (Postfix) with ESMTP id 7B6B6C646F; Mon, 15 Jan 2024 14:59:21 +0000 (UTC) Received: by mail.gandi.net (Postfix) with ESMTPSA id 92FD7FF806; Mon, 15 Jan 2024 14:59:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1705330754; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=LZkhrW90NftZl3gLX1/zmDX5uMKEyUwGVtpHtaU4N8U=; b=GweDVpgJMSSmnHDrqmQBkSgYcuyaENwV0UjwFyxfClxgoiIXeBUkXey1+EA5lKU8L5AtdD oP4H8zC3IFSIU225CdWHjaZ1ZqLgE/BTlkAaLWVZFK3nAKOfxQqYUszQfUk1XVwSBFDHFg nvpFHkg4WSZQw5ZJZD3sRueewkmqdsBSjzju7oFR0UDvHG+KGqAQTA6RSfMlg3YsNEwzQG LILREwXQv1DnrHtulS1cnfgKNiDIc9Eef/M8zrXJGPOHLxCmf12ZCVnhNnBgVMa5GJee0v LcjATmebjbgSP6myKf/FgYiUk04w5cjK5EvtQmQspBpf0sUEUC6jQtSec50MfA== From: =?utf-8?q?Alexis_Lothor=C3=A9?= Date: Mon, 15 Jan 2024 15:56:32 +0100 Subject: [PATCH 3/5] wilc: wifi: do not realloc workqueue everytime an interface is added Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240115-wilc_1000_fixes-v1-3-54d29463a738@bootlin.com> References: <20240115-wilc_1000_fixes-v1-0-54d29463a738@bootlin.com> In-Reply-To: <20240115-wilc_1000_fixes-v1-0-54d29463a738@bootlin.com> To: linux-wireless@vger.kernel.org Cc: Ajay Singh , Claudiu Beznea , Kalle Valo , David Mosberger-Tang , Thomas Petazzoni , linux-kernel@vger.kernel.org, =?utf-8?q?Alexis_Lothor=C3=A9?= X-Mailer: b4 0.12.4 X-GND-Sasl: alexis.lothore@bootlin.com From: Ajay Singh Commit 09ed8bfc5215 ("wilc1000: Rename workqueue from "WILC_wq" to "NETDEV-wq"") moved workqueue creation in wilc_netdev_ifc_init in order to set the interface name in the workqueue name. However, while the driver needs only one workqueue, the wilc_netdev_ifc_init is called each time we add an interface over a phy, which in turns overwrite the workqueue with a new one. This can be observed with the following commands: for i in $(seq 0 10) do iw phy phy0 interface add wlan1 type managed iw dev wlan1 del done ps -eo pid,comm|grep wlan 39 kworker/R-wlan0 98 kworker/R-wlan1 102 kworker/R-wlan1 105 kworker/R-wlan1 108 kworker/R-wlan1 111 kworker/R-wlan1 114 kworker/R-wlan1 117 kworker/R-wlan1 120 kworker/R-wlan1 123 kworker/R-wlan1 126 kworker/R-wlan1 129 kworker/R-wlan1 Fix this leakage by putting back hif_workqueue allocation in wilc_cfg80211_init. Regarding the workqueue name, it is indeed relevant to set it lowercase, however it is not attached to a specific netdev, so enforcing netdev name in the name is not so relevant. Still, enrich the name with the wiphy name to make it clear which phy is using the workqueue. Fixes: 09ed8bfc5215 ("wilc1000: Rename workqueue from "WILC_wq" to "NETDEV-wq"") Signed-off-by: Ajay Singh Co-developed-by: Alexis Lothoré Signed-off-by: Alexis Lothoré --- This patch has initially been done by Ajay, and I slightly reworked it 09ed8bfc5215 ("wilc1000: Rename workqueue from "WILC_wq" to "NETDEV-wq"") also mentions that this workqueue allocation move has also been done to make wq alloc/dealloc symmetric: the revert set back the assymetry, and that remains something to be fixed. Deallocation should likely be moved from netdev.c to cfg80211, but that would be a dedicated rework topic --- drivers/net/wireless/microchip/wilc1000/cfg80211.c | 11 ++++++++++- drivers/net/wireless/microchip/wilc1000/netdev.c | 10 +--------- 2 files changed, 11 insertions(+), 10 deletions(-) diff --git a/drivers/net/wireless/microchip/wilc1000/cfg80211.c b/drivers/net/wireless/microchip/wilc1000/cfg80211.c index ad2509d8c99a..2d0474e6404e 100644 --- a/drivers/net/wireless/microchip/wilc1000/cfg80211.c +++ b/drivers/net/wireless/microchip/wilc1000/cfg80211.c @@ -1804,15 +1804,24 @@ int wilc_cfg80211_init(struct wilc **wilc, struct device *dev, int io_type, INIT_LIST_HEAD(&wl->rxq_head.list); INIT_LIST_HEAD(&wl->vif_list); + wl->hif_workqueue = alloc_ordered_workqueue("%s", WQ_MEM_RECLAIM, + wiphy_name(wl->wiphy)); + if (!wl->hif_workqueue) { + ret = -ENOMEM; + goto free_cfg; + } vif = wilc_netdev_ifc_init(wl, "wlan%d", WILC_STATION_MODE, NL80211_IFTYPE_STATION, false); if (IS_ERR(vif)) { ret = PTR_ERR(vif); - goto free_cfg; + goto free_hq; } return 0; +free_hq: + destroy_workqueue(wl->hif_workqueue); + free_cfg: wilc_wlan_cfg_deinit(wl); diff --git a/drivers/net/wireless/microchip/wilc1000/netdev.c b/drivers/net/wireless/microchip/wilc1000/netdev.c index f3b9709f8730..da52f4a9c1fe 100644 --- a/drivers/net/wireless/microchip/wilc1000/netdev.c +++ b/drivers/net/wireless/microchip/wilc1000/netdev.c @@ -989,13 +989,6 @@ struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name, goto error; } - wl->hif_workqueue = alloc_ordered_workqueue("%s-wq", WQ_MEM_RECLAIM, - ndev->name); - if (!wl->hif_workqueue) { - ret = -ENOMEM; - goto unregister_netdev; - } - ndev->needs_free_netdev = true; vif->iftype = vif_type; vif->idx = wilc_get_available_idx(wl); @@ -1008,12 +1001,11 @@ struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name, return vif; -unregister_netdev: +error: if (rtnl_locked) cfg80211_unregister_netdevice(ndev); else unregister_netdev(ndev); - error: free_netdev(ndev); return ERR_PTR(ret); }