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/sw | |
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/sw')
-rw-r--r-- | drivers/infiniband/sw/rdmavt/pd.c | 3 | ||||
-rw-r--r-- | drivers/infiniband/sw/rdmavt/pd.h | 2 | ||||
-rw-r--r-- | drivers/infiniband/sw/rxe/rxe_verbs.c | 3 | ||||
-rw-r--r-- | drivers/infiniband/sw/siw/siw_verbs.c | 3 | ||||
-rw-r--r-- | drivers/infiniband/sw/siw/siw_verbs.h | 2 |
5 files changed, 8 insertions, 5 deletions
diff --git a/drivers/infiniband/sw/rdmavt/pd.c b/drivers/infiniband/sw/rdmavt/pd.c index a403718f0b5e..01b7abf91520 100644 --- a/drivers/infiniband/sw/rdmavt/pd.c +++ b/drivers/infiniband/sw/rdmavt/pd.c @@ -95,11 +95,12 @@ bail: * * Return: always 0 */ -void rvt_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) +int rvt_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) { struct rvt_dev_info *dev = ib_to_rvt(ibpd->device); spin_lock(&dev->n_pds_lock); dev->n_pds_allocated--; spin_unlock(&dev->n_pds_lock); + return 0; } diff --git a/drivers/infiniband/sw/rdmavt/pd.h b/drivers/infiniband/sw/rdmavt/pd.h index 71ba76d72b1d..06a6a38beedc 100644 --- a/drivers/infiniband/sw/rdmavt/pd.h +++ b/drivers/infiniband/sw/rdmavt/pd.h @@ -51,6 +51,6 @@ #include <rdma/rdma_vt.h> int rvt_alloc_pd(struct ib_pd *pd, struct ib_udata *udata); -void rvt_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata); +int rvt_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata); #endif /* DEF_RDMAVTPD_H */ diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c index 36edc294e105..7fe7316bd287 100644 --- a/drivers/infiniband/sw/rxe/rxe_verbs.c +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c @@ -148,11 +148,12 @@ static int rxe_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) return rxe_add_to_pool(&rxe->pd_pool, &pd->pelem); } -static void rxe_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) +static int rxe_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) { struct rxe_pd *pd = to_rpd(ibpd); rxe_drop_ref(pd); + return 0; } static int rxe_create_ah(struct ib_ah *ibah, diff --git a/drivers/infiniband/sw/siw/siw_verbs.c b/drivers/infiniband/sw/siw/siw_verbs.c index adafa1b8bebe..2d2b6df0b027 100644 --- a/drivers/infiniband/sw/siw/siw_verbs.c +++ b/drivers/infiniband/sw/siw/siw_verbs.c @@ -234,12 +234,13 @@ int siw_alloc_pd(struct ib_pd *pd, struct ib_udata *udata) return 0; } -void siw_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) +int siw_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) { struct siw_device *sdev = to_siw_dev(pd->device); siw_dbg_pd(pd, "free PD\n"); atomic_dec(&sdev->num_pd); + return 0; } void siw_qp_get_ref(struct ib_qp *base_qp) diff --git a/drivers/infiniband/sw/siw/siw_verbs.h b/drivers/infiniband/sw/siw/siw_verbs.h index d9572275a6b6..3dbab78579cb 100644 --- a/drivers/infiniband/sw/siw/siw_verbs.h +++ b/drivers/infiniband/sw/siw/siw_verbs.h @@ -49,7 +49,7 @@ int siw_query_port(struct ib_device *base_dev, u8 port, int siw_query_gid(struct ib_device *base_dev, u8 port, int idx, union ib_gid *gid); int siw_alloc_pd(struct ib_pd *base_pd, struct ib_udata *udata); -void siw_dealloc_pd(struct ib_pd *base_pd, struct ib_udata *udata); +int siw_dealloc_pd(struct ib_pd *base_pd, struct ib_udata *udata); struct ib_qp *siw_create_qp(struct ib_pd *base_pd, struct ib_qp_init_attr *attr, struct ib_udata *udata); |