From patchwork Thu Aug 22 01:42:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ping-Ke Shih X-Patchwork-Id: 821663 Received: from rtits2.realtek.com.tw (rtits2.realtek.com [211.75.126.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E4B5D8BF3 for ; Thu, 22 Aug 2024 01:43:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=211.75.126.72 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724290998; cv=none; b=kcKwCS8D5hhvlKc0axRU5q2TWtI4n0t5yYGoySAX2KcQPSkEFI2HbUt9p9sDkYw3+zL9TekRJubFg8WKkr+iKlOTsLKL/UT8/2iYATFcVJ3scVIeJBkOMlYd7IN6XU9W46uCY0PRMDAtuCaQO+tZjaGJ1L2XYIPeNehf10+DdXg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724290998; c=relaxed/simple; bh=w9YKJXrFRaWWljw14zsYcgT20mHtPKVnHfZ5XzW3Y0s=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=SWe9ew7++r72s832aSp427lAYYlynIJSbVlZm+rfml4X6G1mNuyIRX5ZxhxPBvVOOUhYMO3DCsfvVZ+vUJ/nwXTnK4ZwXWW8JZwIxRKHDtAh9DZ3sQDoLQFsjSk5ejI8mjwhOh/EccGkDOQ1/H/SXRkyPbwk1QE14h4kS2RM/MA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=realtek.com; spf=pass smtp.mailfrom=realtek.com; dkim=temperror (0-bit key) header.d=realtek.com header.i=@realtek.com header.b=D1uyNYV7; arc=none smtp.client-ip=211.75.126.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=realtek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=realtek.com Authentication-Results: smtp.subspace.kernel.org; dkim=temperror (0-bit key) header.d=realtek.com header.i=@realtek.com header.b="D1uyNYV7" X-SpamFilter-By: ArmorX SpamTrap 5.78 with qID 47M1h2oT53389715, This message is accepted by code: ctloc85258 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=realtek.com; s=dkim; t=1724290982; bh=w9YKJXrFRaWWljw14zsYcgT20mHtPKVnHfZ5XzW3Y0s=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version: Content-Transfer-Encoding:Content-Type; b=D1uyNYV77NhOIKE0qf/fUf0XZmG7jUHEpqtl73vd+GICpoKr2vV/x2jRB1E2QoyfC 6IIYFv45Qsxr8w9odMZdv8uST7/gH2NQTFoEM3jTmW0GNXjJYGVNU1fUh9DKCpSSRp 1syRCYVMuJ5GooantpzZq857hyI/G0XleHADKiUC1jtJ5aUxgXh9ZIhpOwbZrHGhMw /z5EA4MbG7r3PGNMC4RVVQSdnN2WOVWWaW8vN6NqpgsAaYH2hCHX+3CnY1OexQ8cQv a4MBfkmTjN6HaLcBq/m5cDcNPNsBk5RInulOgEHPydqk9oOBpq7kMjeFqdApDnMmNN mH0kciq8DGT+A== Received: from mail.realtek.com (rtexh36506.realtek.com.tw[172.21.6.27]) by rtits2.realtek.com.tw (8.15.2/3.02/5.92) with ESMTPS id 47M1h2oT53389715 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 22 Aug 2024 09:43:02 +0800 Received: from RTEXMBS04.realtek.com.tw (172.21.6.97) by RTEXH36506.realtek.com.tw (172.21.6.27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Thu, 22 Aug 2024 09:43:03 +0800 Received: from [127.0.1.1] (172.21.69.94) by RTEXMBS04.realtek.com.tw (172.21.6.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.35; Thu, 22 Aug 2024 09:43:02 +0800 From: Ping-Ke Shih To: , CC: Subject: [PATCH v2 1/2] wifi: mac80211: export ieee80211_purge_tx_queue() for drivers Date: Thu, 22 Aug 2024 09:42:54 +0800 Message-ID: <20240822014255.10211-1-pkshih@realtek.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: RTEXMBS02.realtek.com.tw (172.21.6.95) To RTEXMBS04.realtek.com.tw (172.21.6.97) Drivers need to purge TX SKB when stopping. Using skb_queue_purge() can't report TX status to mac80211, causing ieee80211_free_ack_frame() warns "Have pending ack frames!". Export ieee80211_purge_tx_queue() for drivers to not have to reimplement it. Signed-off-by: Ping-Ke Shih --- v2: - correct wording in commit message, and mention reason why we export the symbol - add comment to note ieee80211_purge_tx_queue() doesn't take locks - remove prototype from net/mac80211/ieee80211_i.h --- include/net/mac80211.h | 13 +++++++++++++ net/mac80211/ieee80211_i.h | 2 -- net/mac80211/status.c | 1 + 3 files changed, 14 insertions(+), 2 deletions(-) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 0a04eaf5343c..651fa926c94a 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -3180,6 +3180,19 @@ ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, */ void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); +/** + * ieee80211_purge_tx_queue - purge TX skb queue + * @hw: the hardware + * @skbs: the skbs + * + * Free a set of transmit skbs. Use this function when device is going to stop + * but some transmit skbs without TX status are still queued. + * This function does not take the list lock and the caller must hold the + * relevant locks to use it. + */ +void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, + struct sk_buff_head *skbs); + /** * DOC: Hardware crypto acceleration * diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index a3485e4c6132..da705bf50d93 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -2072,8 +2072,6 @@ void __ieee80211_subif_start_xmit(struct sk_buff *skb, u32 info_flags, u32 ctrl_flags, u64 *cookie); -void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, - struct sk_buff_head *skbs); struct sk_buff * ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, u32 info_flags); diff --git a/net/mac80211/status.c b/net/mac80211/status.c index dd8f857a1fbc..d1cf987de13b 100644 --- a/net/mac80211/status.c +++ b/net/mac80211/status.c @@ -1301,3 +1301,4 @@ void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, while ((skb = __skb_dequeue(skbs))) ieee80211_free_txskb(hw, skb); } +EXPORT_SYMBOL(ieee80211_purge_tx_queue); From patchwork Thu Aug 22 01:42:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ping-Ke Shih X-Patchwork-Id: 822173 Received: from rtits2.realtek.com.tw (rtits2.realtek.com [211.75.126.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 70F4BA933 for ; Thu, 22 Aug 2024 01:43:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=211.75.126.72 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724290999; cv=none; b=PaLfzYhr7YvUdtAC55l29rFRiXB+ba8YfSvm/aPrykU40DVSobRSx5eyloqGtd16HscJ3fowIHiBxak7jysi9uojgW5uyKdjahyUM+oqbcI2c4DJIi1csFElctb8qaoSCkKAZGD3ZRj4UplFH3Pt94tSeVYqHaBB+2LaaXR44V8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724290999; c=relaxed/simple; bh=atV2L/b4p7JvxjzAfHiJ5aNpov4QC6ThUCktDFqPjow=; 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c=simple/simple; d=realtek.com; s=dkim; t=1724290984; bh=atV2L/b4p7JvxjzAfHiJ5aNpov4QC6ThUCktDFqPjow=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Transfer-Encoding:Content-Type; b=lpw4Kp3NiTDET5nMfySmm/h4MZhchGKVD7owtO6DYXYPUDHG+XSuVGHyeESaXQ2Nl Dz+FWNhnD/ljGg2WXLGOx8ifh077veRE9U4dY+uRFUSLB4u0i9835qd4a9XvbmJvpa KLHPdQE5G81w2wepJQmUfe2Ir7pU4xMNwYcxeDNBi4GBkdskc5bvBslJN1PSGt0pbj zoqPFz/RP5UfRci9ZXpbWeLXebmHz6ePxpUXJNdNz4oATfaJzGMWLghqIjjgkf9NdY CWVJ5afZIj02AHN1Tq8p+cwUJuu56KSAW2YZoUJoxQPu2139XzPQTx5bUjnhGhXak/ rsoh4gLWPBTuw== Received: from mail.realtek.com (rtexh36505.realtek.com.tw[172.21.6.25]) by rtits2.realtek.com.tw (8.15.2/3.02/5.92) with ESMTPS id 47M1h4UU13390053 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 22 Aug 2024 09:43:04 +0800 Received: from RTEXMBS04.realtek.com.tw (172.21.6.97) by RTEXH36505.realtek.com.tw (172.21.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Thu, 22 Aug 2024 09:43:05 +0800 Received: from [127.0.1.1] (172.21.69.94) by RTEXMBS04.realtek.com.tw (172.21.6.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.35; Thu, 22 Aug 2024 09:43:05 +0800 From: Ping-Ke Shih To: , CC: Subject: [PATCH v2 2/2] wifi: rtw88: use ieee80211_purge_tx_queue() to purge TX skb Date: Thu, 22 Aug 2024 09:42:55 +0800 Message-ID: <20240822014255.10211-2-pkshih@realtek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240822014255.10211-1-pkshih@realtek.com> References: <20240822014255.10211-1-pkshih@realtek.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: RTEXMBS02.realtek.com.tw (172.21.6.95) To RTEXMBS04.realtek.com.tw (172.21.6.97) When removing kernel modules by: rmmod rtw88_8723cs rtw88_8703b rtw88_8723x rtw88_sdio rtw88_core Driver uses skb_queue_purge() to purge TX skb, but not report tx status causing "Have pending ack frames!" warning. Use ieee80211_purge_tx_queue() to correct this. Since ieee80211_purge_tx_queue() doesn't take locks, to prevent racing between TX work and purge TX queue, flush and destroy TX work in advance. wlan0: deauthenticating from aa:f5:fd:60:4c:a8 by local choice (Reason: 3=DEAUTH_LEAVING) ------------[ cut here ]------------ Have pending ack frames! WARNING: CPU: 3 PID: 9232 at net/mac80211/main.c:1691 ieee80211_free_ack_frame+0x5c/0x90 [mac80211] CPU: 3 PID: 9232 Comm: rmmod Tainted: G C 6.10.1-200.fc40.aarch64 #1 Hardware name: pine64 Pine64 PinePhone Braveheart (1.1)/Pine64 PinePhone Braveheart (1.1), BIOS 2024.01 01/01/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ieee80211_free_ack_frame+0x5c/0x90 [mac80211] lr : ieee80211_free_ack_frame+0x5c/0x90 [mac80211] sp : ffff80008c1b37b0 x29: ffff80008c1b37b0 x28: ffff000003be8000 x27: 0000000000000000 x26: 0000000000000000 x25: ffff000003dc14b8 x24: ffff80008c1b37d0 x23: ffff000000ff9f80 x22: 0000000000000000 x21: 000000007fffffff x20: ffff80007c7e93d8 x19: ffff00006e66f400 x18: 0000000000000000 x17: ffff7ffffd2b3000 x16: ffff800083fc0000 x15: 0000000000000000 x14: 0000000000000000 x13: 2173656d61726620 x12: 6b636120676e6964 x11: 0000000000000000 x10: 000000000000005d x9 : ffff8000802af2b0 x8 : ffff80008c1b3430 x7 : 0000000000000001 x6 : 0000000000000001 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000003be8000 Call trace: ieee80211_free_ack_frame+0x5c/0x90 [mac80211] idr_for_each+0x74/0x110 ieee80211_free_hw+0x44/0xe8 [mac80211] rtw_sdio_remove+0x9c/0xc0 [rtw88_sdio] sdio_bus_remove+0x44/0x180 device_remove+0x54/0x90 device_release_driver_internal+0x1d4/0x238 driver_detach+0x54/0xc0 bus_remove_driver+0x78/0x108 driver_unregister+0x38/0x78 sdio_unregister_driver+0x2c/0x40 rtw_8723cs_driver_exit+0x18/0x1000 [rtw88_8723cs] __do_sys_delete_module.isra.0+0x190/0x338 __arm64_sys_delete_module+0x1c/0x30 invoke_syscall+0x74/0x100 el0_svc_common.constprop.0+0x48/0xf0 do_el0_svc+0x24/0x38 el0_svc+0x3c/0x158 el0t_64_sync_handler+0x120/0x138 el0t_64_sync+0x194/0x198 ---[ end trace 0000000000000000 ]--- Reported-by: Peter Robinson Closes: https://lore.kernel.org/linux-wireless/CALeDE9OAa56KMzgknaCD3quOgYuEHFx9_hcT=OFgmMAb+8MPyA@mail.gmail.com/ Signed-off-by: Ping-Ke Shih --- v2: - flush and destroy TX work before doing purge_tx_queue - remove "Tested-by: Peter Robinson" since code changed --- drivers/net/wireless/realtek/rtw88/sdio.c | 6 +++--- drivers/net/wireless/realtek/rtw88/usb.c | 5 +++-- 2 files changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/net/wireless/realtek/rtw88/sdio.c b/drivers/net/wireless/realtek/rtw88/sdio.c index 21d0754dd7f6..b67e551fcee3 100644 --- a/drivers/net/wireless/realtek/rtw88/sdio.c +++ b/drivers/net/wireless/realtek/rtw88/sdio.c @@ -1297,12 +1297,12 @@ static void rtw_sdio_deinit_tx(struct rtw_dev *rtwdev) struct rtw_sdio *rtwsdio = (struct rtw_sdio *)rtwdev->priv; int i; - for (i = 0; i < RTK_MAX_TX_QUEUE_NUM; i++) - skb_queue_purge(&rtwsdio->tx_queue[i]); - flush_workqueue(rtwsdio->txwq); destroy_workqueue(rtwsdio->txwq); kfree(rtwsdio->tx_handler_data); + + for (i = 0; i < RTK_MAX_TX_QUEUE_NUM; i++) + ieee80211_purge_tx_queue(rtwdev->hw, &rtwsdio->tx_queue[i]); } int rtw_sdio_probe(struct sdio_func *sdio_func, diff --git a/drivers/net/wireless/realtek/rtw88/usb.c b/drivers/net/wireless/realtek/rtw88/usb.c index e83ab6fb83f5..dbc7d8d73494 100644 --- a/drivers/net/wireless/realtek/rtw88/usb.c +++ b/drivers/net/wireless/realtek/rtw88/usb.c @@ -423,10 +423,11 @@ static void rtw_usb_tx_handler(struct work_struct *work) static void rtw_usb_tx_queue_purge(struct rtw_usb *rtwusb) { + struct rtw_dev *rtwdev = rtwusb->rtwdev; int i; for (i = 0; i < ARRAY_SIZE(rtwusb->tx_queue); i++) - skb_queue_purge(&rtwusb->tx_queue[i]); + ieee80211_purge_tx_queue(rtwdev->hw, &rtwusb->tx_queue[i]); } static void rtw_usb_write_port_complete(struct urb *urb) @@ -889,9 +890,9 @@ static void rtw_usb_deinit_tx(struct rtw_dev *rtwdev) { struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev); - rtw_usb_tx_queue_purge(rtwusb); flush_workqueue(rtwusb->txwq); destroy_workqueue(rtwusb->txwq); + rtw_usb_tx_queue_purge(rtwusb); } static int rtw_usb_intf_init(struct rtw_dev *rtwdev,