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i40iw: Zero-out consumer key on allocate stag for FMR 

If the application invalidates the MR before the FMR WR, HW parses the
consumer key portion of the stag and returns an invalid stag key
Asynchronous Event (AE) that tears down the QP.

Fix this by zeroing-out the consumer key portion of the allocated stag
returned to application for FMR.

Fixes: ee855d3b93f3 ("RDMA/i40iw: Add base memory management extensions")
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
hifive-unleashed-5.1
Shiraz Saleem 2018-01-11 18:10:51 -06:00 committed by Jason Gunthorpe
parent 23541b28e5
commit 6376e926af
1 changed files with 1 additions and 0 deletions
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drivers/infiniband/hw/i40iw/i40iw_verbs.c
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@ -1637,6 +1637,7 @@ static struct ib_mr *i40iw_alloc_mr(struct ib_pd *pd,
err_code = -EOVERFLOW;
goto err;
}
stag &= ~I40IW_CQPSQ_STAG_KEY_MASK;
iwmr->stag = stag;
iwmr->ibmr.rkey = stag;
iwmr->ibmr.lkey = stag;