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author | Jason Gunthorpe <jgg@mellanox.com> | 2019-02-04 14:53:42 -0700 |
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committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-02-04 14:53:42 -0700 |
commit | 6a8a2aa62da2fbe51f5449993fd366398048f465 (patch) | |
tree | 566c6fcc782eefbca054af8553371d09b9d0734c /include/rdma/ib_verbs.h | |
parent | a163afc88556e099271a7b423295bc5176fcecce (diff) | |
parent | 8834f5600cf3c8db365e18a3d5cac2c2780c81e5 (diff) | |
download | linux-stable-6a8a2aa62da2fbe51f5449993fd366398048f465.tar.gz linux-stable-6a8a2aa62da2fbe51f5449993fd366398048f465.tar.bz2 linux-stable-6a8a2aa62da2fbe51f5449993fd366398048f465.zip |
Merge tag 'v5.0-rc5' into rdma.git for-next
Linux 5.0-rc5
Needed to merge the include/uapi changes so we have an up to date
single-tree for these files. Patches already posted are also expected to
need this for dependencies.
Diffstat (limited to 'include/rdma/ib_verbs.h')
-rw-r--r-- | include/rdma/ib_verbs.h | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index f7e8709e48cd..2e1f1e885ee5 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -2592,9 +2592,10 @@ struct ib_device { const struct uapi_definition *driver_def; enum rdma_driver_id driver_id; + /* - * Provides synchronization between device unregistration and netlink - * commands on a device. To be used only by core. + * Positive refcount indicates that the device is currently + * registered and cannot be unregistered. */ refcount_t refcount; struct completion unreg_completion; @@ -3932,6 +3933,25 @@ static inline bool ib_access_writable(int access_flags) int ib_check_mr_status(struct ib_mr *mr, u32 check_mask, struct ib_mr_status *mr_status); +/** + * ib_device_try_get: Hold a registration lock + * device: The device to lock + * + * A device under an active registration lock cannot become unregistered. It + * is only possible to obtain a registration lock on a device that is fully + * registered, otherwise this function returns false. + * + * The registration lock is only necessary for actions which require the + * device to still be registered. Uses that only require the device pointer to + * be valid should use get_device(&ibdev->dev) to hold the memory. + * + */ +static inline bool ib_device_try_get(struct ib_device *dev) +{ + return refcount_inc_not_zero(&dev->refcount); +} + +void ib_device_put(struct ib_device *device); struct net_device *ib_get_net_dev_by_params(struct ib_device *dev, u8 port, u16 pkey, const union ib_gid *gid, const struct sockaddr *addr); |