diff options
| author | Prabhath Sajeepa <psajeepa@purestorage.com> | 2019-12-13 01:11:29 +0100 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2020-01-03 20:56:41 +0100 |
| commit | b5671afe5e39ed71e94eae788bacdcceec69db09 (patch) | |
| tree | 13cbdfc5b3140c6ab1c37d9ea7bb039ee32c1ada /drivers/infiniband | |
| parent | RDMA/siw: Simplify QP representation (diff) | |
| download | linux-b5671afe5e39ed71e94eae788bacdcceec69db09.tar.xz linux-b5671afe5e39ed71e94eae788bacdcceec69db09.zip | |
IB/mlx5: Fix outstanding_pi index for GSI qps
Commit b0ffeb537f3a ("IB/mlx5: Fix iteration overrun in GSI qps") changed
the way outstanding WRs are tracked for the GSI QP. But the fix did not
cover the case when a call to ib_post_send() fails and updates index to
track outstanding.
Since the prior commmit outstanding_pi should not be bounded otherwise the
loop generate_completions() will fail.
Fixes: b0ffeb537f3a ("IB/mlx5: Fix iteration overrun in GSI qps")
Link: https://lore.kernel.org/r/1576195889-23527-1-git-send-email-psajeepa@purestorage.com
Signed-off-by: Prabhath Sajeepa <psajeepa@purestorage.com>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/gsi.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/mlx5/gsi.c b/drivers/infiniband/hw/mlx5/gsi.c index ac4d8d1b9a07..1ae6fd95acaa 100644 --- a/drivers/infiniband/hw/mlx5/gsi.c +++ b/drivers/infiniband/hw/mlx5/gsi.c @@ -507,8 +507,7 @@ int mlx5_ib_gsi_post_send(struct ib_qp *qp, const struct ib_send_wr *wr, ret = ib_post_send(tx_qp, &cur_wr.wr, bad_wr); if (ret) { /* Undo the effect of adding the outstanding wr */ - gsi->outstanding_pi = (gsi->outstanding_pi - 1) % - gsi->cap.max_send_wr; + gsi->outstanding_pi--; goto err; } spin_unlock_irqrestore(&gsi->lock, flags); |