From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 11BF3846D; Tue, 11 Mar 2025 15:23:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741706591; cv=none; b=HeURtZLhXrLZe4xal3yGQkiKd/E7AOXZRI+TcpUBu4eO8b6yMMIfyxF06E02e4h7mJUs3mxC3NfTzyXoRrjB7nSVuQDY7XeJx2uIw8SLwagIvAtzl+BWI3+zEjni3MdMj8DpUIhzzCKoJmOlM5Wfdkv9uslHPIaY0UbR7/Yylok= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741706591; c=relaxed/simple; bh=r176Aq6ZogtDwJ9B6hONn8duSL7EyJCg6JIbeIigmZU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=A1BpzAhKIdN89yQAf5ExY4T81Lale7BU25p1gJ3GnZe4CPUpL1grrnH0o2CUHb+zr5t1ppiDhOHUT2M7/A7rSGlcVSHpV1nZSgO/Ssgu7lGqRhkMTN0jdKXV6hJZ5o6KgMMmXx474mrc1tHUAf6XS4/BNcj2qGEdkfhx3AuFpz4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=SgdrmqV8; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="SgdrmqV8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 83C8CC4CEE9; Tue, 11 Mar 2025 15:23:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1741706590; bh=r176Aq6ZogtDwJ9B6hONn8duSL7EyJCg6JIbeIigmZU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SgdrmqV8tPou5zvrF2PBP0Gj7IcOW91Dken5s4TC3ZsaLQS5e6a2klAcNBz+13sfx H15EFfqKdWcfwMMtqN1BjTTRVNfIr6lP7a7ZfDUu1Jy0pHbaURgpokvu1kIRBV4P9Y jildOUNSzZtCTZgqh+espl09iAUPPm/HUb9+apBU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jian Shen , Jijie Shao , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.10 100/462] net: hns3: fix oops when unload drivers paralleling Date: Tue, 11 Mar 2025 15:56:06 +0100 Message-ID: <20250311145802.312852021@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250311145758.343076290@linuxfoundation.org> References: <20250311145758.343076290@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jian Shen [ Upstream commit 92e5995773774a3e70257e9c95ea03518268bea5 ] When unload hclge driver, it tries to disable sriov first for each ae_dev node from hnae3_ae_dev_list. If user unloads hns3 driver at the time, because it removes all the ae_dev nodes, and it may cause oops. But we can't simply use hnae3_common_lock for this. Because in the process flow of pci_disable_sriov(), it will trigger the remove flow of VF, which will also take hnae3_common_lock. To fixes it, introduce a new mutex to protect the unload process. Fixes: 0dd8a25f355b ("net: hns3: disable sriov before unload hclge layer") Signed-off-by: Jian Shen Signed-off-by: Jijie Shao Link: https://patch.msgid.link/20250118094741.3046663-1-shaojijie@huawei.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/hisilicon/hns3/hnae3.c | 15 +++++++++++++++ drivers/net/ethernet/hisilicon/hns3/hnae3.h | 2 ++ drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 2 ++ .../ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 2 ++ .../ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c | 2 ++ 5 files changed, 23 insertions(+) diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.c b/drivers/net/ethernet/hisilicon/hns3/hnae3.c index 9a63fbc694083..b25fb400f4767 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hnae3.c +++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.c @@ -40,6 +40,21 @@ EXPORT_SYMBOL(hnae3_unregister_ae_algo_prepare); */ static DEFINE_MUTEX(hnae3_common_lock); +/* ensure the drivers being unloaded one by one */ +static DEFINE_MUTEX(hnae3_unload_lock); + +void hnae3_acquire_unload_lock(void) +{ + mutex_lock(&hnae3_unload_lock); +} +EXPORT_SYMBOL(hnae3_acquire_unload_lock); + +void hnae3_release_unload_lock(void) +{ + mutex_unlock(&hnae3_unload_lock); +} +EXPORT_SYMBOL(hnae3_release_unload_lock); + static bool hnae3_client_match(enum hnae3_client_type client_type) { if (client_type == HNAE3_CLIENT_KNIC || diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.h b/drivers/net/ethernet/hisilicon/hns3/hnae3.h index 4a9576a449e10..25b6b4f780f1d 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hnae3.h +++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.h @@ -764,4 +764,6 @@ int hnae3_register_client(struct hnae3_client *client); void hnae3_set_client_init_flag(struct hnae3_client *client, struct hnae3_ae_dev *ae_dev, unsigned int inited); +void hnae3_acquire_unload_lock(void); +void hnae3_release_unload_lock(void); #endif diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index 9ff5179b4d879..110baa9949a0c 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -4751,9 +4751,11 @@ module_init(hns3_init_module); */ static void __exit hns3_exit_module(void) { + hnae3_acquire_unload_lock(); pci_unregister_driver(&hns3_driver); hnae3_unregister_client(&client); hns3_dbg_unregister_debugfs(); + hnae3_release_unload_lock(); } module_exit(hns3_exit_module); diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c index 885793707a5f1..ec918f2981ec2 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c @@ -11539,9 +11539,11 @@ static int hclge_init(void) static void hclge_exit(void) { + hnae3_acquire_unload_lock(); hnae3_unregister_ae_algo_prepare(&ae_algo); hnae3_unregister_ae_algo(&ae_algo); destroy_workqueue(hclge_wq); + hnae3_release_unload_lock(); } module_init(hclge_init); module_exit(hclge_exit); diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c index 755935f9efc81..aa026eb5cf588 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3vf/hclgevf_main.c @@ -3726,8 +3726,10 @@ static int hclgevf_init(void) static void hclgevf_exit(void) { + hnae3_acquire_unload_lock(); hnae3_unregister_ae_algo(&ae_algovf); destroy_workqueue(hclgevf_wq); + hnae3_release_unload_lock(); } module_init(hclgevf_init); module_exit(hclgevf_exit); -- 2.39.5