[PATCH 3.16 110/245] IB/mlx4: Avoid executing gid task when device is being removed

Ben Hutchings
2020-04-23T23:17:09Z

From: Moni Shoua <monis@mellanox.com>

commit 4bf9715f184969dc703bde7be94919995024a6a9 upstream.

When device is being removed (e.g during VPI port link type change
from ETH to IB), tasks for gid table changes should not be executed.

Flush the current queue of tasks and block further tasks from entering the queue.

Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/infiniband/hw/mlx4/main.c | 9 +++++++++
1 file changed, 9 insertions(+)

--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -1395,6 +1395,9 @@ static void update_gids_task(struct work
int err;
struct mlx4_dev *dev = gw->dev->dev;

+ if (!gw->dev->ib_active)
+ return;
+
mailbox = mlx4_alloc_cmd_mailbox(dev);
if (IS_ERR(mailbox)) {
pr_warn("update gid table failed %ld\n", PTR_ERR(mailbox));
@@ -1425,6 +1428,9 @@ static void reset_gids_task(struct work_
int err;
struct mlx4_dev *dev = gw->dev->dev;

+ if (!gw->dev->ib_active)
+ return;
+
mailbox = mlx4_alloc_cmd_mailbox(dev);
if (IS_ERR(mailbox)) {
pr_warn("reset gid table failed\n");
@@ -2363,6 +2369,9 @@ static void mlx4_ib_remove(struct mlx4_d
struct mlx4_ib_dev *ibdev = ibdev_ptr;
int p;

+ ibdev->ib_active = false;
+ flush_workqueue(wq);
+
mlx4_ib_close_sriov(ibdev);
mlx4_ib_mad_cleanup(ibdev);
ib_unregister_device(&ibdev->ib_dev);