From patchwork Fri Sep 9 10:22:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Tian, Kevin" X-Patchwork-Id: 12970985 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 55C15ECAAD5 for ; Fri, 9 Sep 2022 03:06:31 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0E48210EBCB; Fri, 9 Sep 2022 03:06:09 +0000 (UTC) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2ECB710EA2E; Fri, 9 Sep 2022 03:05:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1662692746; x=1694228746; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=oJ5SymJmzLe17tI+1YjGhf5nVnZnZY22ruGxdLktqXY=; b=JdRBF3gqbBqIElbjykQcUmhxm4FO0etnsZW1L8cBdCqhoiCOyexMcAgz 4+8vYWxAH5Uonr4hVP1ctp4MDiDPdedg4ddfoOMpNgv2sLZ7WZbaI04iC QYb/xfTNzUDkNr+fs+B4cp6hVLGQD7exZqNdwpU9yWdI7HZ/Bx92ixj6l qcTMQ7ZwB1voAz5F8/I57hVken/5xy/7oxYVUVB9Jd5r2JnfG6ukakjmc NO0BHZIewxdRnbWQbD2GIKhHzS8Wnn9IeZp8500W2u2xrzk/B3PusjZ5O dRqRxo5PK0lWB1m2G3sFJxps9Buv6Un1QsujOPCH+qVlqCgFku5wt6+2t w==; X-IronPort-AV: E=McAfee;i="6500,9779,10464"; a="277116782" X-IronPort-AV: E=Sophos;i="5.93,300,1654585200"; d="scan'208";a="277116782" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Sep 2022 20:05:45 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,300,1654585200"; d="scan'208";a="740909314" Received: from sqa-gate.sh.intel.com (HELO michael.clx.dev.tsp.org) ([10.239.48.212]) by orsmga004.jf.intel.com with ESMTP; 08 Sep 2022 20:05:36 -0700 From: Kevin Tian To: Zhenyu Wang , Zhi Wang , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Daniel Vetter , Eric Farman , Matthew Rosato , Halil Pasic , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Tony Krowiak , Jason Herne , Harald Freudenberger , Diana Craciun , Alex Williamson , Cornelia Huck , Longfang Liu , Shameer Kolothum , Jason Gunthorpe , Yishai Hadas , Kevin Tian , Eric Auger , Kirti Wankhede , Leon Romanovsky , Abhishek Sahu , Christoph Hellwig , intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org Subject: [PATCH v3 14/15] vfio: Rename vfio_device_put() and vfio_device_try_get() Date: Fri, 9 Sep 2022 18:22:46 +0800 Message-Id: <20220909102247.67324-15-kevin.tian@intel.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20220909102247.67324-1-kevin.tian@intel.com> References: <20220909102247.67324-1-kevin.tian@intel.com> MIME-Version: 1.0 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: Yi Liu Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" With the addition of vfio_put_device() now the names become confusing. vfio_put_device() is clear from object life cycle p.o.v given kref. vfio_device_put()/vfio_device_try_get() are helpers for tracking users on a registered device. Now rename them: - vfio_device_put() -> vfio_device_put_registration() - vfio_device_try_get() -> vfio_device_try_get_registration() Signed-off-by: Kevin Tian Reviewed-by: Jason Gunthorpe Reviewed-by: Eric Auger --- drivers/vfio/vfio_main.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index 5bc221730d7b..37cbd10f3faf 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -453,13 +453,13 @@ static void vfio_group_get(struct vfio_group *group) * Device objects - create, release, get, put, search */ /* Device reference always implies a group reference */ -static void vfio_device_put(struct vfio_device *device) +static void vfio_device_put_registration(struct vfio_device *device) { if (refcount_dec_and_test(&device->refcount)) complete(&device->comp); } -static bool vfio_device_try_get(struct vfio_device *device) +static bool vfio_device_try_get_registration(struct vfio_device *device) { return refcount_inc_not_zero(&device->refcount); } @@ -471,7 +471,8 @@ static struct vfio_device *vfio_group_get_device(struct vfio_group *group, mutex_lock(&group->device_lock); list_for_each_entry(device, &group->device_list, group_next) { - if (device->dev == dev && vfio_device_try_get(device)) { + if (device->dev == dev && + vfio_device_try_get_registration(device)) { mutex_unlock(&group->device_lock); return device; } @@ -673,7 +674,7 @@ static int __vfio_register_dev(struct vfio_device *device, if (existing_device) { dev_WARN(device->dev, "Device already exists on group %d\n", iommu_group_id(group->iommu_group)); - vfio_device_put(existing_device); + vfio_device_put_registration(existing_device); if (group->type == VFIO_NO_IOMMU || group->type == VFIO_EMULATED_IOMMU) iommu_group_remove_device(device->dev); @@ -731,7 +732,7 @@ static struct vfio_device *vfio_device_get_from_name(struct vfio_group *group, ret = !strcmp(dev_name(it->dev), buf); } - if (ret && vfio_device_try_get(it)) { + if (ret && vfio_device_try_get_registration(it)) { device = it; break; } @@ -751,7 +752,7 @@ void vfio_unregister_group_dev(struct vfio_device *device) bool interrupted = false; long rc; - vfio_device_put(device); + vfio_device_put_registration(device); rc = try_wait_for_completion(&device->comp); while (rc <= 0) { if (device->ops->request) @@ -1311,7 +1312,7 @@ static int vfio_group_ioctl_get_device_fd(struct vfio_group *group, err_put_fdno: put_unused_fd(fdno); err_put_device: - vfio_device_put(device); + vfio_device_put_registration(device); return ret; } @@ -1493,7 +1494,7 @@ static int vfio_device_fops_release(struct inode *inode, struct file *filep) vfio_device_unassign_container(device); - vfio_device_put(device); + vfio_device_put_registration(device); return 0; }