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[2620:137:e000::1:20]) by mx.google.com with ESMTP id u7-20020a170906124700b00925f0294d4bsi15661834eja.494.2023.03.23.01.50.21; Thu, 23 Mar 2023 01:50:45 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linux.dev header.s=key1 header.b=aPn5X1CD; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linux.dev Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229508AbjCWIha (ORCPT + 99 others); Thu, 23 Mar 2023 04:37:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42812 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231608AbjCWIhH (ORCPT ); Thu, 23 Mar 2023 04:37:07 -0400 Received: from out-5.mta1.migadu.com (out-5.mta1.migadu.com [IPv6:2001:41d0:203:375::5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0B0D0FF29 for ; Thu, 23 Mar 2023 01:35:59 -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=1679560557; 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=sR3yPTtRDVj1xoPJWPkU1xtU6p71nBTQtzFAzgAXTAM=; b=aPn5X1CDLNGicO++xOTkolNf/4Uw7IjGooBgYaR1whX2aspiUAaolHbmudZtyPshdQLFP0 fJY3I+uyqublkl7FC6ehPI+9HsohOvYbxM+ecTX/IZ19buHUPFHHCR1ZiqHI5Dl8iYRip1 fJBODkoL2vICZ6cHnXb92wg9orz9H3w= From: Cai Huoqing To: cai.huoqing@linux.dev Cc: Oded Gabbay , Tomer Tayar , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH] accel/habanalabs: Remove redundant pci_clear_master Date: Thu, 23 Mar 2023 16:35:49 +0800 Message-Id: <20230323083553.16864-1-cai.huoqing@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Spam-Status: No, score=0.8 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS,TO_EQ_FM_DIRECT_MX autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 --- drivers/accel/habanalabs/common/device.c | 1 - drivers/accel/habanalabs/common/pci/pci.c | 2 -- 2 files changed, 3 deletions(-) diff --git a/drivers/accel/habanalabs/common/device.c b/drivers/accel/habanalabs/common/device.c index 713005998cbc..2fb1e2ec3a83 100644 --- a/drivers/accel/habanalabs/common/device.c +++ b/drivers/accel/habanalabs/common/device.c @@ -1271,7 +1271,6 @@ int hl_device_resume(struct hl_device *hdev) return 0; disable_device: - pci_clear_master(hdev->pdev); pci_disable_device(hdev->pdev); return rc; diff --git a/drivers/accel/habanalabs/common/pci/pci.c b/drivers/accel/habanalabs/common/pci/pci.c index d1f4c695baf2..191e0e3cf3a5 100644 --- a/drivers/accel/habanalabs/common/pci/pci.c +++ b/drivers/accel/habanalabs/common/pci/pci.c @@ -420,7 +420,6 @@ int hl_pci_init(struct hl_device *hdev) unmap_pci_bars: hl_pci_bars_unmap(hdev); disable_device: - pci_clear_master(pdev); pci_disable_device(pdev); return rc; @@ -436,6 +435,5 @@ void hl_pci_fini(struct hl_device *hdev) { hl_pci_bars_unmap(hdev); - pci_clear_master(hdev->pdev); pci_disable_device(hdev->pdev); } -- 2.34.1