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| author | Prabhath Sajeepa <psajeepa@purestorage.com> | 2019-12-12 17:11:29 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-11 04:35:46 -0800 |
| commit | 320a24fae28097cb54140182212e713e1922e069 (patch) | |
| tree | 176a38c06d0dc4e7b15bc6690fdf0faf5ac0dbcf | |
| parent | b4d104ce6dfeaf1a9914561cdc43bc4eab7ea7c8 (diff) | |
| download | linux-rpi-320a24fae28097cb54140182212e713e1922e069.tar.gz linux-rpi-320a24fae28097cb54140182212e713e1922e069.tar.bz2 linux-rpi-320a24fae28097cb54140182212e713e1922e069.zip | |
IB/mlx5: Fix outstanding_pi index for GSI qps
commit b5671afe5e39ed71e94eae788bacdcceec69db09 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 4950df3f71b6..5c73c0a790fa 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); |