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| author | Håkon Bugge <haakon.bugge@oracle.com> | 2021-03-22 14:35:32 +0100 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2021-04-01 14:47:24 -0300 |
| commit | 194f64a3cad3ab9e381e996a13089de3215d1887 (patch) | |
| tree | ab21df05d6442c398838ebc23d17225e64a59624 /drivers/infiniband/core/cm.c | |
| parent | b1f27f688f716956e0b1c75d947a8bf22ed82ddc (diff) | |
| download | linux-194f64a3cad3ab9e381e996a13089de3215d1887.tar.gz linux-194f64a3cad3ab9e381e996a13089de3215d1887.tar.bz2 linux-194f64a3cad3ab9e381e996a13089de3215d1887.zip | |
RDMA/core: Fix corrupted SL on passive side
On RoCE systems, a CM REQ contains a Primary Hop Limit > 1 and Primary
Subnet Local is zero.
In cm_req_handler(), the cm_process_routed_req() function is called. Since
the Primary Subnet Local value is zero in the request, and since this is
RoCE (Primary Local LID is permissive), the following statement will be
executed:
IBA_SET(CM_REQ_PRIMARY_SL, req_msg, wc->sl);
This corrupts SL in req_msg if it was different from zero. In other words,
a request to setup a connection using an SL != zero, will not be honored,
and a connection using SL zero will be created instead.
Fixed by not calling cm_process_routed_req() on RoCE systems, the
cm_process_route_req() is only for IB anyhow.
Fixes: 3971c9f6dbf2 ("IB/cm: Add interim support for routed paths")
Link: https://lore.kernel.org/r/1616420132-31005-1-git-send-email-haakon.bugge@oracle.com
Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/core/cm.c')
| -rw-r--r-- | drivers/infiniband/core/cm.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index 74ca5e67a113..32c836b7ae97 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -2138,7 +2138,8 @@ static int cm_req_handler(struct cm_work *work) goto destroy; } - cm_process_routed_req(req_msg, work->mad_recv_wc->wc); + if (cm_id_priv->av.ah_attr.type != RDMA_AH_ATTR_TYPE_ROCE) + cm_process_routed_req(req_msg, work->mad_recv_wc->wc); memset(&work->path[0], 0, sizeof(work->path[0])); if (cm_req_has_alt_path(req_msg)) |