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| author | Jason Gunthorpe <jgg@nvidia.com> | 2020-09-02 11:11:20 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-30 10:38:19 +0100 |
| commit | b4612866af7a2d5fcb776dd21c58ddefe3b2718a (patch) | |
| tree | 2dfa141814b1a4079311182cb095643fb046ad5f /drivers/infiniband | |
| parent | e8122b11d18025ad825fb013671989f29d05e467 (diff) | |
| download | linux-b4612866af7a2d5fcb776dd21c58ddefe3b2718a.tar.gz linux-b4612866af7a2d5fcb776dd21c58ddefe3b2718a.tar.bz2 linux-b4612866af7a2d5fcb776dd21c58ddefe3b2718a.zip | |
RDMA/cma: Remove dead code for kernel rdmacm multicast
[ Upstream commit 1bb5091def706732c749df9aae45fbca003696f2 ]
There is no kernel user of RDMA CM multicast so this code managing the
multicast subscription of the kernel-only internal QP is dead. Remove it.
This makes the bug fixes in the next patches much simpler.
Link: https://lore.kernel.org/r/20200902081122.745412-7-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/core/cma.c | 19 |
1 files changed, 4 insertions, 15 deletions
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 1f14cd4ce3db..65c15114cbe7 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -4020,16 +4020,6 @@ static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast) else pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n", status); - mutex_lock(&id_priv->qp_mutex); - if (!status && id_priv->id.qp) { - status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid, - be16_to_cpu(multicast->rec.mlid)); - if (status) - pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n", - status); - } - mutex_unlock(&id_priv->qp_mutex); - event.status = status; event.param.ud.private_data = mc->context; if (!status) { @@ -4283,6 +4273,10 @@ int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr, struct cma_multicast *mc; int ret; + /* Not supported for kernel QPs */ + if (WARN_ON(id->qp)) + return -EINVAL; + if (!id->device) return -EINVAL; @@ -4337,11 +4331,6 @@ void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr) list_del(&mc->list); spin_unlock_irq(&id_priv->lock); - if (id->qp) - ib_detach_mcast(id->qp, - &mc->multicast.ib->rec.mgid, - be16_to_cpu(mc->multicast.ib->rec.mlid)); - BUG_ON(id_priv->cma_dev->device != id->device); if (rdma_cap_ib_mcast(id->device, id->port_num)) { |