IB/mlx5: Fix iteration overrun in GSI qps

Number of outstanding_pi may overflow and as a result may indicate that
there are no elements in the queue. The effect of doing this is that the
MAD layer will get stuck waiting for completions. The MAD layer will
think that the QP is full - because it didn't receive these completions.

This fix changes it so the outstanding_pi number is increased
with 32-bit wraparound and is not limited to max_send_wr so
that the difference between outstanding_pi and outstanding_ci will
really indicate the number of outstanding completions.

Cc: Stable <[email protected]>
Fixes: ea6dc2036224 ('IB/mlx5: Reorder GSI completions')
Signed-off-by: Slava Shwartsman <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Reviewed-by: Haggai Eran <[email protected]>
Reviewed-by: Sagi Grimberg <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>

0 files changed, 0 insertions, 0 deletions