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

[ Upstream commit 6376e926af1a8661dd1b2e6d0896e07f84a35844 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/infiniband/hw/i40iw/i40iw_verbs.c b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
index 9e7ae7161d2f5b45914d1c94f3501fe96bda3127..b7961f21b555b5a348c520aa184edfe00dacd116 100644 (file)
--- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
@@ -1656,6 +1656,7 @@ 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;