From: Eric Auger <eric.auger@redhat.com>
To: Kevin Tian <kevin.tian@intel.com>,
Zhenyu Wang <zhenyuw@linux.intel.com>,
Zhi Wang <zhi.a.wang@intel.com>,
Jani Nikula <jani.nikula@linux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Eric Farman <farman@linux.ibm.com>,
Matthew Rosato <mjrosato@linux.ibm.com>,
Halil Pasic <pasic@linux.ibm.com>,
Vineeth Vijayan <vneethv@linux.ibm.com>,
Peter Oberparleiter <oberpar@linux.ibm.com>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Tony Krowiak <akrowiak@linux.ibm.com>,
Jason Herne <jjherne@linux.ibm.com>,
Harald Freudenberger <freude@linux.ibm.com>,
Diana Craciun <diana.craciun@oss.nxp.com>,
Alex Williamson <alex.williamson@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
Longfang Liu <liulongfang@huawei.com>,
Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>,
Jason Gunthorpe <jgg@ziepe.ca>, Yishai Hadas <yishaih@nvidia.com>,
Kirti Wankhede <kwankhede@nvidia.com>,
Leon Romanovsky <leon@kernel.org>,
Abhishek Sahu <abhsahu@nvidia.com>,
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
Cc: Yi Liu <yi.l.liu@intel.com>
Subject: Re: [PATCH v2 14/15] vfio: Rename vfio_device_put() and vfio_device_try_get()
Date: Wed, 7 Sep 2022 21:35:52 +0200 [thread overview]
Message-ID: <2ed84b0f-5d60-919f-06a4-a5ede2f98ce5@redhat.com> (raw)
In-Reply-To: <20220901143747.32858-15-kevin.tian@intel.com>
On 9/1/22 16:37, Kevin Tian wrote:
> 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 <kevin.tian@intel.com>
> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Eric
> ---
> 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 957d9f286550..bfa675d314ab 100644
> --- a/drivers/vfio/vfio_main.c
> +++ b/drivers/vfio/vfio_main.c
> @@ -451,13 +451,13 @@ 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);
> }
> @@ -469,7 +469,8 @@ 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;
> }
> @@ -671,7 +672,7 @@ 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);
> @@ -730,7 +731,7 @@ 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;
> }
> @@ -750,7 +751,7 @@ 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)
> @@ -1286,7 +1287,7 @@ static int vfio_group_get_device_fd(struct vfio_group *group, char *buf)
> err_put_fdno:
> put_unused_fd(fdno);
> err_put_device:
> - vfio_device_put(device);
> + vfio_device_put_registration(device);
> return ret;
> }
>
> @@ -1461,7 +1462,7 @@ 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;
> }
next prev parent reply other threads:[~2022-09-07 19:36 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-01 14:37 [PATCH v2 00/15] Tidy up vfio_device life cycle Kevin Tian
2022-09-01 14:37 ` [PATCH v2 01/15] vfio: Add helpers for unifying " Kevin Tian
[not found] ` <YxcV05AVN4kqdPX6@infradead.org>
2022-09-07 0:43 ` Tian, Kevin
[not found] ` <YxiGpryRNrxvEoiY@infradead.org>
2022-09-07 12:11 ` Jason Gunthorpe
2022-09-07 19:28 ` Eric Auger
2022-09-08 6:19 ` Tian, Kevin
2022-09-08 9:08 ` Eric Auger
2022-09-01 14:37 ` [PATCH v2 02/15] vfio/pci: Use the new device life cycle helpers Kevin Tian
2022-09-01 14:37 ` [PATCH v2 03/15] vfio/mlx5: " Kevin Tian
2022-09-01 14:37 ` [PATCH v2 04/15] vfio/hisi_acc: " Kevin Tian
2022-09-01 14:37 ` [PATCH v2 05/15] vfio/mdpy: " Kevin Tian
2022-09-01 14:37 ` [PATCH v2 06/15] vfio/mtty: " Kevin Tian
2022-09-01 14:37 ` [PATCH v2 07/15] vfio/mbochs: " Kevin Tian
2022-09-01 14:37 ` [PATCH v2 08/15] drm/i915/gvt: " Kevin Tian
2022-09-07 3:17 ` Zhenyu Wang
2022-09-01 14:37 ` [PATCH v2 09/15] vfio/ap: " Kevin Tian
2022-09-01 14:37 ` [PATCH v2 10/15] vfio/fsl-mc: " Kevin Tian
2022-09-01 14:37 ` [PATCH v2 11/15] vfio/platform: " Kevin Tian
2022-09-07 19:28 ` Eric Auger
2022-09-01 14:37 ` [PATCH v2 12/15] vfio/amba: " Kevin Tian
2022-09-01 7:37 ` Tian, Kevin
2022-09-07 19:32 ` Eric Auger
2022-09-01 14:37 ` [PATCH v2 13/15] vfio/ccw: " Kevin Tian
2022-09-08 7:19 ` Tian, Kevin
2022-09-08 20:50 ` Eric Farman
2022-09-09 1:52 ` Tian, Kevin
2022-09-01 14:37 ` [PATCH v2 14/15] vfio: Rename vfio_device_put() and vfio_device_try_get() Kevin Tian
2022-09-07 19:35 ` Eric Auger [this message]
2022-09-01 14:37 ` [PATCH v2 15/15] vfio: Add struct device to vfio_device Kevin Tian
2022-09-01 7:40 ` Tian, Kevin
2022-09-08 9:06 ` Eric Auger
2022-09-08 9:17 ` Yi Liu
2022-09-08 9:39 ` Eric Auger
2022-09-08 12:37 ` Jason Gunthorpe
2022-09-09 3:09 ` Tian, Kevin
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