From patchwork Thu Mar 23 11:26:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cai Huoqing X-Patchwork-Id: 666516 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3105CC7619A for ; Thu, 23 Mar 2023 11:32:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230455AbjCWLcW (ORCPT ); Thu, 23 Mar 2023 07:32:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50402 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229485AbjCWLcU (ORCPT ); Thu, 23 Mar 2023 07:32:20 -0400 Received: from out-15.mta1.migadu.com (out-15.mta1.migadu.com [IPv6:2001:41d0:203:375::f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 31B75126EF for ; Thu, 23 Mar 2023 04:32:18 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1679570783; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=rFrZeFL95bAADeoxTVP7Nzd5sq/6QShfuHH0D38gefI=; b=iieSNHbLTfna/AJWw4ifxYEls++cBF9dlNm9peQh4RNpnr/S41QQfmoR6P1mfO93mmDEm/ sUOXphPRjd2lfzh8OKjD0eTzs73xofcjuI6u/1+T2KsrkL9xXCatCQFGOu976gs0BeEbgp oYmUYiuMI5+e3DM0+fDsGgf8JSQ62BM= From: Cai Huoqing To: cai.huoqing@linux.dev Cc: Kalle Valo , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Yan-Hsuan Chuang , Ping-Ke Shih , ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, ath11k@lists.infradead.org, ath12k@lists.infradead.org Subject: [PATCH 1/5] wifi: ath11k: Remove redundant pci_clear_master Date: Thu, 23 Mar 2023 19:26:09 +0800 Message-Id: <20230323112613.7550-1-cai.huoqing@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Remove pci_clear_master to simplify the code, the bus-mastering is also cleared in do_pci_disable_device, like this: ./drivers/pci/pci.c:2197 static void do_pci_disable_device(struct pci_dev *dev) { u16 pci_command; pci_read_config_word(dev, PCI_COMMAND, &pci_command); if (pci_command & PCI_COMMAND_MASTER) { pci_command &= ~PCI_COMMAND_MASTER; pci_write_config_word(dev, PCI_COMMAND, pci_command); } pcibios_disable_device(dev); }. And dev->is_busmaster is set to 0 in pci_disable_device. Signed-off-by: Cai Huoqing Reviewed-by: Simon Horman --- drivers/net/wireless/ath/ath11k/pci.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c index 0aeef2948ff5..522d01e5e11c 100644 --- a/drivers/net/wireless/ath/ath11k/pci.c +++ b/drivers/net/wireless/ath/ath11k/pci.c @@ -540,7 +540,7 @@ static int ath11k_pci_claim(struct ath11k_pci *ab_pci, struct pci_dev *pdev) if (!ab->mem) { ath11k_err(ab, "failed to map pci bar %d\n", ATH11K_PCI_BAR_NUM); ret = -EIO; - goto clear_master; + goto release_region; } ab->mem_ce = ab->mem; @@ -548,8 +548,6 @@ static int ath11k_pci_claim(struct ath11k_pci *ab_pci, struct pci_dev *pdev) ath11k_dbg(ab, ATH11K_DBG_BOOT, "boot pci_mem 0x%pK\n", ab->mem); return 0; -clear_master: - pci_clear_master(pdev); release_region: pci_release_region(pdev, ATH11K_PCI_BAR_NUM); disable_device: @@ -565,7 +563,6 @@ static void ath11k_pci_free_region(struct ath11k_pci *ab_pci) pci_iounmap(pci_dev, ab->mem); ab->mem = NULL; - pci_clear_master(pci_dev); pci_release_region(pci_dev, ATH11K_PCI_BAR_NUM); if (pci_is_enabled(pci_dev)) pci_disable_device(pci_dev); From patchwork Thu Mar 23 11:26:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cai Huoqing X-Patchwork-Id: 666904 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5AEEC6FD1C for ; Thu, 23 Mar 2023 11:32:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230382AbjCWLcV (ORCPT ); Thu, 23 Mar 2023 07:32:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50400 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229463AbjCWLcU (ORCPT ); Thu, 23 Mar 2023 07:32:20 -0400 X-Greylist: delayed 347 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Thu, 23 Mar 2023 04:32:18 PDT Received: from out-31.mta0.migadu.com (out-31.mta0.migadu.com [IPv6:2001:41d0:1004:224b::1f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 21C1BAD27 for ; Thu, 23 Mar 2023 04:32:18 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1679570789; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=tooTxJ1S3+bY95x8JLOzf8Cr/9M9iNd5ycqcB6CNt6g=; b=MPPbcgSRYJtn4/oTx7vmZtr+8RpDlRdnN6QgSqBa/GWRXPjE+iDrG+orCzV826kNoxLPEk WALEbdE/Q9zmZ6Wf/cfnOibc5KyJqwOgKHl8pp8J/W1dC2nV6lP4vNajVT+51eSBQxS3v1 paQWnioiLt/iK77rFsMewk9UnlTlWMo= From: Cai Huoqing To: cai.huoqing@linux.dev Cc: Kalle Valo , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Yan-Hsuan Chuang , Ping-Ke Shih , ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, ath11k@lists.infradead.org, ath12k@lists.infradead.org Subject: [PATCH 2/5] wifi: ath10k: Remove redundant pci_clear_master Date: Thu, 23 Mar 2023 19:26:10 +0800 Message-Id: <20230323112613.7550-2-cai.huoqing@linux.dev> In-Reply-To: <20230323112613.7550-1-cai.huoqing@linux.dev> References: <20230323112613.7550-1-cai.huoqing@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Remove pci_clear_master to simplify the code, the bus-mastering is also cleared in do_pci_disable_device, like this: ./drivers/pci/pci.c:2197 static void do_pci_disable_device(struct pci_dev *dev) { u16 pci_command; pci_read_config_word(dev, PCI_COMMAND, &pci_command); if (pci_command & PCI_COMMAND_MASTER) { pci_command &= ~PCI_COMMAND_MASTER; pci_write_config_word(dev, PCI_COMMAND, pci_command); } pcibios_disable_device(dev); }. And dev->is_busmaster is set to 0 in pci_disable_device. Signed-off-by: Cai Huoqing Reviewed-by: Simon Horman --- drivers/net/wireless/ath/ath10k/pci.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c index 728d607289c3..a7f44f6335fb 100644 --- a/drivers/net/wireless/ath/ath10k/pci.c +++ b/drivers/net/wireless/ath/ath10k/pci.c @@ -3406,15 +3406,12 @@ static int ath10k_pci_claim(struct ath10k *ar) if (!ar_pci->mem) { ath10k_err(ar, "failed to iomap BAR%d\n", BAR_NUM); ret = -EIO; - goto err_master; + goto err_region; } ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot pci_mem 0x%pK\n", ar_pci->mem); return 0; -err_master: - pci_clear_master(pdev); - err_region: pci_release_region(pdev, BAR_NUM); @@ -3431,7 +3428,6 @@ static void ath10k_pci_release(struct ath10k *ar) pci_iounmap(pdev, ar_pci->mem); pci_release_region(pdev, BAR_NUM); - pci_clear_master(pdev); pci_disable_device(pdev); } From patchwork Thu Mar 23 11:26:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cai Huoqing X-Patchwork-Id: 666517 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 36446C6FD1D for ; Thu, 23 Mar 2023 11:32:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230259AbjCWLcV (ORCPT ); Thu, 23 Mar 2023 07:32:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50400 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229451AbjCWLcU (ORCPT ); Thu, 23 Mar 2023 07:32:20 -0400 X-Greylist: delayed 352 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Thu, 23 Mar 2023 04:32:18 PDT Received: from out-27.mta1.migadu.com (out-27.mta1.migadu.com [IPv6:2001:41d0:203:375::1b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D78A6A58 for ; Thu, 23 Mar 2023 04:32:18 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1679570795; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=OTUWX3aTLswoFCHtkP0zXcRP9Ge0kmAhVIeOjF5/rGc=; b=tGiiSgjvr0b+Z7aAWVjX2r/RSBTRbfF/dareLKLdicHxsBVQ+Zgy38C5/P8Iap3KDd/lpi etzTUrtxWpnsW2G4MBYbkdgMdil/d8miyjYW4eFjJCqX6Xr0L3JGtvmgwYf67neCzmGbMe PGsYNpHJG7jSQRcfAuPzg0tb3MaqB9w= From: Cai Huoqing To: cai.huoqing@linux.dev Cc: Kalle Valo , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Yan-Hsuan Chuang , Ping-Ke Shih , ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, ath11k@lists.infradead.org, ath12k@lists.infradead.org Subject: [PATCH 3/5] wifi: ath12k: Remove redundant pci_clear_master Date: Thu, 23 Mar 2023 19:26:11 +0800 Message-Id: <20230323112613.7550-3-cai.huoqing@linux.dev> In-Reply-To: <20230323112613.7550-1-cai.huoqing@linux.dev> References: <20230323112613.7550-1-cai.huoqing@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Remove pci_clear_master to simplify the code, the bus-mastering is also cleared in do_pci_disable_device, like this: ./drivers/pci/pci.c:2197 static void do_pci_disable_device(struct pci_dev *dev) { u16 pci_command; pci_read_config_word(dev, PCI_COMMAND, &pci_command); if (pci_command & PCI_COMMAND_MASTER) { pci_command &= ~PCI_COMMAND_MASTER; pci_write_config_word(dev, PCI_COMMAND, pci_command); } pcibios_disable_device(dev); }. And dev->is_busmaster is set to 0 in pci_disable_device. Signed-off-by: Cai Huoqing Reviewed-by: Simon Horman --- drivers/net/wireless/ath/ath12k/pci.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/net/wireless/ath/ath12k/pci.c b/drivers/net/wireless/ath/ath12k/pci.c index d32637b0113d..9ee47caf8485 100644 --- a/drivers/net/wireless/ath/ath12k/pci.c +++ b/drivers/net/wireless/ath/ath12k/pci.c @@ -755,14 +755,12 @@ static int ath12k_pci_claim(struct ath12k_pci *ab_pci, struct pci_dev *pdev) if (!ab->mem) { ath12k_err(ab, "failed to map pci bar %d\n", ATH12K_PCI_BAR_NUM); ret = -EIO; - goto clear_master; + goto release_region; } ath12k_dbg(ab, ATH12K_DBG_BOOT, "boot pci_mem 0x%pK\n", ab->mem); return 0; -clear_master: - pci_clear_master(pdev); release_region: pci_release_region(pdev, ATH12K_PCI_BAR_NUM); disable_device: @@ -778,7 +776,6 @@ static void ath12k_pci_free_region(struct ath12k_pci *ab_pci) pci_iounmap(pci_dev, ab->mem); ab->mem = NULL; - pci_clear_master(pci_dev); pci_release_region(pci_dev, ATH12K_PCI_BAR_NUM); if (pci_is_enabled(pci_dev)) pci_disable_device(pci_dev); From patchwork Thu Mar 23 11:26:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cai Huoqing X-Patchwork-Id: 666902 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC0B0C77B60 for ; Thu, 23 Mar 2023 11:32:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230016AbjCWLcY (ORCPT ); Thu, 23 Mar 2023 07:32:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50406 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230196AbjCWLcU (ORCPT ); Thu, 23 Mar 2023 07:32:20 -0400 Received: from out-44.mta0.migadu.com (out-44.mta0.migadu.com [IPv6:2001:41d0:1004:224b::2c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 31D071B325 for ; Thu, 23 Mar 2023 04:32:18 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1679570800; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ZdgDBuT4R3jYSxR7mPDt2s0ue0mJFKZNVR81FCp1IBk=; b=fqAbpCsaP3fQqEmQ3WmwcgxofDhbTR9Foo+kABFooB5SEWA51oOArpWXh3+E22u+OvTuzl 4kB3mh11+EjwMt/cdDd8+Pd067J8e6UHBti+IDAsg28/AE1lDzENAJz/wauJWfkWbMKTQ+ TCjgMya52bHugLpy5CUatBZ8jTkvmz0= From: Cai Huoqing To: cai.huoqing@linux.dev Cc: Kalle Valo , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Yan-Hsuan Chuang , Ping-Ke Shih , ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, ath11k@lists.infradead.org, ath12k@lists.infradead.org Subject: [PATCH 4/5] wifi: rtw88: Remove redundant pci_clear_master Date: Thu, 23 Mar 2023 19:26:12 +0800 Message-Id: <20230323112613.7550-4-cai.huoqing@linux.dev> In-Reply-To: <20230323112613.7550-1-cai.huoqing@linux.dev> References: <20230323112613.7550-1-cai.huoqing@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Remove pci_clear_master to simplify the code, the bus-mastering is also cleared in do_pci_disable_device, like this: ./drivers/pci/pci.c:2197 static void do_pci_disable_device(struct pci_dev *dev) { u16 pci_command; pci_read_config_word(dev, PCI_COMMAND, &pci_command); if (pci_command & PCI_COMMAND_MASTER) { pci_command &= ~PCI_COMMAND_MASTER; pci_write_config_word(dev, PCI_COMMAND, pci_command); } pcibios_disable_device(dev); }. And dev->is_busmaster is set to 0 in pci_disable_device. Signed-off-by: Cai Huoqing Reviewed-by: Simon Horman Reviewed-by: Ping-Ke Shih --- drivers/net/wireless/realtek/rtw88/pci.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c index b4bd831c9845..60145d2f3e5a 100644 --- a/drivers/net/wireless/realtek/rtw88/pci.c +++ b/drivers/net/wireless/realtek/rtw88/pci.c @@ -1552,7 +1552,6 @@ static int rtw_pci_claim(struct rtw_dev *rtwdev, struct pci_dev *pdev) static void rtw_pci_declaim(struct rtw_dev *rtwdev, struct pci_dev *pdev) { - pci_clear_master(pdev); pci_disable_device(pdev); } From patchwork Thu Mar 23 11:26:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cai Huoqing X-Patchwork-Id: 666903 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E99AC76195 for ; Thu, 23 Mar 2023 11:32:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230495AbjCWLcX (ORCPT ); Thu, 23 Mar 2023 07:32:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50404 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230016AbjCWLcU (ORCPT ); Thu, 23 Mar 2023 07:32:20 -0400 X-Greylist: delayed 345 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Thu, 23 Mar 2023 04:32:19 PDT Received: from out-13.mta0.migadu.com (out-13.mta0.migadu.com [91.218.175.13]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 319DA12046 for ; Thu, 23 Mar 2023 04:32:18 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1679570808; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rGX1VskIO2esd5iCrlayQqCszF4VgpeWWivrdPxtbg4=; b=DEC0eNYJuul660lvjxaoeqUvLhH6GgzbdTk1AxcCx2Kj5x96BZHZ6aIIUJVK+sncVZDQbr L9l0JBXZZCm4W/vQB+sibYpvqmQhuHR7E+rRTEisdt4Tig3SaANUsw7ODwTgZtri/miSV/ x9vbQkNC/yn23vno5LmkGylhSwUG/RI= From: Cai Huoqing To: cai.huoqing@linux.dev Cc: Kalle Valo , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Yan-Hsuan Chuang , Ping-Ke Shih , ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, ath11k@lists.infradead.org, ath12k@lists.infradead.org Subject: [PATCH 5/5] wifi: rtw89: Remove redundant pci_clear_master Date: Thu, 23 Mar 2023 19:26:13 +0800 Message-Id: <20230323112613.7550-5-cai.huoqing@linux.dev> In-Reply-To: <20230323112613.7550-1-cai.huoqing@linux.dev> References: <20230323112613.7550-1-cai.huoqing@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Remove pci_clear_master to simplify the code, the bus-mastering is also cleared in do_pci_disable_device, like this: ./drivers/pci/pci.c:2197 static void do_pci_disable_device(struct pci_dev *dev) { u16 pci_command; pci_read_config_word(dev, PCI_COMMAND, &pci_command); if (pci_command & PCI_COMMAND_MASTER) { pci_command &= ~PCI_COMMAND_MASTER; pci_write_config_word(dev, PCI_COMMAND, pci_command); } pcibios_disable_device(dev); }. And dev->is_busmaster is set to 0 in pci_disable_device. Signed-off-by: Cai Huoqing Reviewed-by: Simon Horman Acked-by: Ping-Ke Shih --- drivers/net/wireless/realtek/rtw89/pci.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/net/wireless/realtek/rtw89/pci.c b/drivers/net/wireless/realtek/rtw89/pci.c index ec8bb5f10482..75bd3ac4dd71 100644 --- a/drivers/net/wireless/realtek/rtw89/pci.c +++ b/drivers/net/wireless/realtek/rtw89/pci.c @@ -2694,7 +2694,6 @@ static int rtw89_pci_claim_device(struct rtw89_dev *rtwdev, static void rtw89_pci_declaim_device(struct rtw89_dev *rtwdev, struct pci_dev *pdev) { - pci_clear_master(pdev); pci_disable_device(pdev); }