diff options
author | Leon Romanovsky <leonro@mellanox.com> | 2020-09-07 15:09:13 +0300 |
---|---|---|
committer | Jason Gunthorpe <jgg@nvidia.com> | 2020-09-09 19:57:22 +0300 |
commit | 91a7c58fce065506fd98954d27694e5d83c96638 (patch) | |
tree | a2e06921077e53db3b9678d44398183a063ca038 /drivers/infiniband/core | |
parent | 558d52b2976b1db3098139aa83ceb9af9066a0e7 (diff) | |
download | linux-91a7c58fce065506fd98954d27694e5d83c96638.tar.xz |
RDMA: Restore ability to fail on PD deallocate
The IB verbs objects are counted by the kernel and ib_core ensures that
deallocate PD will success so it will be called once all other objects
that depends on PD will be released. This is achieved by managing various
reference counters on such objects.
The mlx5 driver didn't follow this standard flow when allowed DEVX objects
that are not managed by ib_core to be interleaved with the ones under
ib_core responsibility.
In such interleaved scenarios deallocate command can fail and ib_core will
leave uobject in internal DB and attempt to clean it later to free
resources anyway.
This change partially restores returned value from dealloc_pd() for all
drivers, but keeping in mind that non-DEVX devices and kernel verbs paths
shouldn't fail.
Fixes: 21a428a019c9 ("RDMA: Handle PD allocations by IB/core")
Link: https://lore.kernel.org/r/20200907120921.476363-2-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/core')
-rw-r--r-- | drivers/infiniband/core/uverbs_std_types.c | 3 | ||||
-rw-r--r-- | drivers/infiniband/core/verbs.c | 8 |
2 files changed, 7 insertions, 4 deletions
diff --git a/drivers/infiniband/core/uverbs_std_types.c b/drivers/infiniband/core/uverbs_std_types.c index 08c39cfb1bd9..2932e832f48f 100644 --- a/drivers/infiniband/core/uverbs_std_types.c +++ b/drivers/infiniband/core/uverbs_std_types.c @@ -122,8 +122,7 @@ static int uverbs_free_pd(struct ib_uobject *uobject, if (ret) return ret; - ib_dealloc_pd_user(pd, &attrs->driver_udata); - return 0; + return ib_dealloc_pd_user(pd, &attrs->driver_udata); } void ib_uverbs_free_event_queue(struct ib_uverbs_event_queue *event_queue) diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c index 3096e73797b7..a4a2cd378cb4 100644 --- a/drivers/infiniband/core/verbs.c +++ b/drivers/infiniband/core/verbs.c @@ -329,7 +329,7 @@ EXPORT_SYMBOL(__ib_alloc_pd); * exist. The caller is responsible to synchronously destroy them and * guarantee no new allocations will happen. */ -void ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata) +int ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata) { int ret; @@ -343,9 +343,13 @@ void ib_dealloc_pd_user(struct ib_pd *pd, struct ib_udata *udata) requires the caller to guarantee we can't race here. */ WARN_ON(atomic_read(&pd->usecnt)); + ret = pd->device->ops.dealloc_pd(pd, udata); + if (ret) + return ret; + rdma_restrack_del(&pd->res); - pd->device->ops.dealloc_pd(pd, udata); kfree(pd); + return ret; } EXPORT_SYMBOL(ib_dealloc_pd_user); |