diff options
| author | Yi Liu <yi.l.liu@intel.com> | 2023-07-18 13:55:39 +0300 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2023-07-25 19:18:02 +0300 |
| commit | a80e1de93275fbfba0617e6bbea8522ea5329eb5 (patch) | |
| tree | 729884b8ae34f86dd4a6038ecb1a4fa9e684a95e /drivers/vfio/vfio_main.c | |
| parent | af949759bad27934b6f242e8a3b1c394e09fb4a3 (diff) | |
| download | linux-a80e1de93275fbfba0617e6bbea8522ea5329eb5.tar.xz | |
vfio: Add helper to search vfio_device in a dev_set
There are drivers that need to search vfio_device within a given dev_set.
e.g. vfio-pci. So add a helper.
vfio_pci_is_device_in_set() now returns -EBUSY in commit a882c16a2b7e
("vfio/pci: Change vfio_pci_try_bus_reset() to use the dev_set") where
it was trying to preserve the return of vfio_pci_try_zap_and_vma_lock_cb().
However, it makes more sense to return -ENODEV.
Suggested-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Yanting Jiang <yanting.jiang@intel.com>
Tested-by: Terrence Xu <terrence.xu@intel.com>
Tested-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20230718105542.4138-8-yi.l.liu@intel.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/vfio_main.c')
| -rw-r--r-- | drivers/vfio/vfio_main.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index f0ca33b2e1df..ab4f3a794f78 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -141,6 +141,21 @@ unsigned int vfio_device_set_open_count(struct vfio_device_set *dev_set) } EXPORT_SYMBOL_GPL(vfio_device_set_open_count); +struct vfio_device * +vfio_find_device_in_devset(struct vfio_device_set *dev_set, + struct device *dev) +{ + struct vfio_device *cur; + + lockdep_assert_held(&dev_set->lock); + + list_for_each_entry(cur, &dev_set->device_list, dev_set_list) + if (cur->dev == dev) + return cur; + return NULL; +} +EXPORT_SYMBOL_GPL(vfio_find_device_in_devset); + /* * Device objects - create, release, get, put, search */ |