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| author |   Jack Morgenstein <jackm@dev.mellanox.co.il> | 2018-01-12 07:58:40 +0200 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2018-01-15 15:33:21 -0700 |
| commit | 852f6927594d0d3e8632c889b2ab38cbc46476ad (patch) | |
| tree | f50f218f78836e70e791d2ba235f0b2d2510c163 /drivers/infiniband/hw/mlx4 | |
| parent | RDMA/qedr: Fix endian problems around imm_data (diff) | |
| download | linux-dev-852f6927594d0d3e8632c889b2ab38cbc46476ad.tar.xz linux-dev-852f6927594d0d3e8632c889b2ab38cbc46476ad.zip | |
IB/mlx4: Fix incorrectly releasing steerable UD QPs when have only ETH ports
Allocating steerable UD QPs depends on having at least one IB port,
while releasing those QPs does not.
As a result, when there are only ETH ports, the IB (RoCE) driver
requests releasing a qp range whose base qp is zero, with
qp count zero.
When SR-IOV is enabled, and the VF driver is running on a VM over
a hypervisor which treats such qp release calls as errors
(rather than NOPs), we see lines in the VM message log like:
mlx4_core 0002:00:02.0: Failed to release qp range base:0 cnt:0
Fix this by adding a check for a zero count in mlx4_release_qp_range()
(which thus treats releasing 0 qps as a nop), and eliminating the
check for device managed flow steering when releasing steerable UD QPs.
(Freeing ib_uc_qpns_bitmap unconditionally is also OK, since it
remains NULL when steerable UD QPs are not allocated).
Cc: <stable@vger.kernel.org>
Fixes: 4196670be786 ("IB/mlx4: Don't allocate range of steerable UD QPs for Ethernet-only device")
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx4')
| -rw-r--r-- | drivers/infiniband/hw/mlx4/main.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c index 5695ce53fddb..8d2ee9322f2e 100644 --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -3001,9 +3001,8 @@ err_steer_free_bitmap: kfree(ibdev->ib_uc_qpns_bitmap); err_steer_qp_release: - if (ibdev->steering_support == MLX4_STEERING_MODE_DEVICE_MANAGED) - mlx4_qp_release_range(dev, ibdev->steer_qpn_base, - ibdev->steer_qpn_count); + mlx4_qp_release_range(dev, ibdev->steer_qpn_base, + ibdev->steer_qpn_count); err_counter: for (i = 0; i < ibdev->num_ports; ++i) mlx4_ib_delete_counters_table(ibdev, &ibdev->counters_table[i]); @@ -3108,11 +3107,9 @@ static void mlx4_ib_remove(struct mlx4_dev *dev, void *ibdev_ptr) ibdev->iboe.nb.notifier_call = NULL; } - if (ibdev->steering_support == MLX4_STEERING_MODE_DEVICE_MANAGED) { - mlx4_qp_release_range(dev, ibdev->steer_qpn_base, - ibdev->steer_qpn_count); - kfree(ibdev->ib_uc_qpns_bitmap); - } + mlx4_qp_release_range(dev, ibdev->steer_qpn_base, + ibdev->steer_qpn_count); + kfree(ibdev->ib_uc_qpns_bitmap); iounmap(ibdev->uar_map); for (p = 0; p < ibdev->num_ports; ++p) |