From mboxrd@z Thu Jan 1 00:00:00 1970 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id A48DAC6FD1D for ; Thu, 23 Mar 2023 10:29:58 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0AD4610E032; Thu, 23 Mar 2023 10:29:58 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id 118FA10E032 for ; Thu, 23 Mar 2023 10:29:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679567395; x=1711103395; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=gOXFFZe79WcM896xEk4DmyKX6AYQIZBrt1Fiv+yvES0=; b=mwB+ct02prEOB0QLNh1O3fkRvDukBQyOKURzIBnuSwQ9HiY9fywuFPsr XVl8+NPK0KwezcO5h3hgMy+BOAMFEB4eYr6jtiVGz5/Av0j2SGnWYY8L8 49tFhM38BTyQq41XYpsvk8aSZYg4voAH0vbwLoSsUYpdhdYpHAl7isztU U1+dqFq+QvN3e8JmIK9JBLJgBWoQTlEv3aobGCD/LpyD3oJb93w51VbZf lHqiml2fuB6Xeg7an8U/63SIwD7l2QaL8I5uicve5/TNuKqjBZPnv5p4l kMi4JFyun+oPq4OB89Xi+zCDv0pxA/nqdqBtn7536G8bDkMV/yK3v/jJZ g==; X-IronPort-AV: E=McAfee;i="6600,9927,10657"; a="339482255" X-IronPort-AV: E=Sophos;i="5.98,283,1673942400"; d="scan'208";a="339482255" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Mar 2023 03:29:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10657"; a="825769546" X-IronPort-AV: E=Sophos;i="5.98,283,1673942400"; d="scan'208";a="825769546" Received: from joe-255.igk.intel.com (HELO localhost) ([10.91.220.57]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Mar 2023 03:29:54 -0700 Date: Thu, 23 Mar 2023 11:29:52 +0100 From: Stanislaw Gruszka To: Cai Huoqing Subject: Re: [PATCH] accel/habanalabs: Remove redundant pci_clear_master Message-ID: <20230323102952.GD2130371@linux.intel.com> References: <20230323083553.16864-1-cai.huoqing@linux.dev> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230323083553.16864-1-cai.huoqing@linux.dev> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Oded Gabbay , Tomer Tayar , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Thu, Mar 23, 2023 at 04:35:49PM +0800, Cai Huoqing wrote: > 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 LGTM Reviewed-by: Stanislaw Gruszka