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Code Issues Releases Wiki Activity

vfio: Set device->group in helper function

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This avoids referencing device->group in __vfio_register_dev().

Link: https://lore.kernel.org/r/20221201145535.589687-5-yi.l.liu@intel.com
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Tested-by: Lixiao Yang <lixiao.yang@intel.com>
Tested-by: Yu He <yu.he@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Yi Liu 2022-11-24 21:22:27 -08:00 committed by Jason Gunthorpe
parent 32e0922821
commit 49ea02d390
1 changed files with 26 additions and 15 deletions
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41
drivers/vfio/vfio_main.c
View file

@ -528,18 +528,29 @@ static void vfio_device_group_unregister(struct vfio_device *device)
mutex_unlock(&device->group->device_lock);
}
static int __vfio_register_dev(struct vfio_device *device,
struct vfio_group *group)
static int vfio_device_set_group(struct vfio_device *device,
enum vfio_group_type type)
{
int ret;
struct vfio_group *group;
if (type == VFIO_IOMMU)
group = vfio_group_find_or_alloc(device->dev);
else
group = vfio_noiommu_group_alloc(device->dev, type);
/*
* In all cases group is the output of one of the group allocation
* functions and we have group->drivers incremented for us.
*/
if (IS_ERR(group))
return PTR_ERR(group);
/* Our reference on group is moved to the device */
device->group = group;
return 0;
}
static int __vfio_register_dev(struct vfio_device *device,
enum vfio_group_type type)
{
int ret;
if (WARN_ON(device->ops->bind_iommufd &&
(!device->ops->unbind_iommufd ||
!device->ops->attach_ioas)))
@ -552,12 +563,13 @@ static int __vfio_register_dev(struct vfio_device *device,
if (!device->dev_set)
vfio_assign_device_set(device, device);
/* Our reference on group is moved to the device */
device->group = group;
ret = dev_set_name(&device->device, "vfio%d", device->index);
if (ret)
goto err_out;
return ret;
ret = vfio_device_set_group(device, type);
if (ret)
return ret;
ret = device_add(&device->device);
if (ret)
@ -576,8 +588,7 @@ static int __vfio_register_dev(struct vfio_device *device,
int vfio_register_group_dev(struct vfio_device *device)
{
return __vfio_register_dev(device,
vfio_group_find_or_alloc(device->dev));
return __vfio_register_dev(device, VFIO_IOMMU);
}
EXPORT_SYMBOL_GPL(vfio_register_group_dev);
@ -587,8 +598,7 @@ EXPORT_SYMBOL_GPL(vfio_register_group_dev);
*/
int vfio_register_emulated_iommu_dev(struct vfio_device *device)
{
return __vfio_register_dev(device,
vfio_noiommu_group_alloc(device->dev, VFIO_EMULATED_IOMMU));
return __vfio_register_dev(device, VFIO_EMULATED_IOMMU);
}
EXPORT_SYMBOL_GPL(vfio_register_emulated_iommu_dev);
@ -658,6 +668,7 @@ void vfio_unregister_group_dev(struct vfio_device *device)
/* Balances device_add in register path */
device_del(&device->device);
/* Balances vfio_device_set_group in register path */
vfio_device_remove_group(device);
}
EXPORT_SYMBOL_GPL(vfio_unregister_group_dev);