Author: hselasky
Date: Wed Mar 7 14:03:31 2018
New Revision: 330597
URL: https://svnweb.freebsd.org/changeset/base/330597
Log:
Disable unsupported disassociate ucontext functionality in mlx5ib(4).
MFC after: 1 week
Sponsored by: Mellanox Technologies
Modified:
head/sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c
Modified: head/sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c
==============================================================================
--- head/sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c Wed Mar 7 13:59:46 2018
(r330596)
+++ head/sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c Wed Mar 7 14:03:31 2018
(r330597)
@@ -1241,62 +1241,6 @@ static int mlx5_ib_set_vma_data(struct vm_area_struct
return 0;
}
-static void mlx5_ib_disassociate_ucontext(struct ib_ucontext *ibcontext)
-{
- int ret;
- struct vm_area_struct *vma;
- struct mlx5_ib_vma_private_data *vma_private, *n;
- struct mlx5_ib_ucontext *context = to_mucontext(ibcontext);
- struct task_struct *owning_process = NULL;
- struct mm_struct *owning_mm = NULL;
-
- owning_process = get_pid_task(ibcontext->tgid, PIDTYPE_PID);
- if (!owning_process)
- return;
-
- owning_mm = get_task_mm(owning_process);
- if (!owning_mm) {
- pr_info("no mm, disassociate ucontext is pending task
termination\n");
- while (1) {
- put_task_struct(owning_process);
- usleep_range(1000, 2000);
- owning_process = get_pid_task(ibcontext->tgid,
- PIDTYPE_PID);
- if (!owning_process /* ||
- owning_process->state == TASK_DEAD */) {
- pr_info("disassociate ucontext done, task was
terminated\n");
- /* in case task was dead need to release the
- * task struct.
- */
- if (owning_process)
- put_task_struct(owning_process);
- return;
- }
- }
- }
-
- /* need to protect from a race on closing the vma as part of
- * mlx5_ib_vma_close.
- */
- down_read(&owning_mm->mmap_sem);
- list_for_each_entry_safe(vma_private, n, &context->vma_private_list,
- list) {
- vma = vma_private->vma;
- ret = zap_vma_ptes(vma, vma->vm_start,
- PAGE_SIZE);
- WARN_ONCE(ret, "%s: zap_vma_ptes failed", __func__);
- /* context going to be destroyed, should
- * not access ops any more.
- */
- vma->vm_ops = NULL;
- list_del(&vma_private->list);
- kfree(vma_private);
- }
- up_read(&owning_mm->mmap_sem);
- mmput(owning_mm);
- put_task_struct(owning_process);
-}
-
static inline char *mmap_cmd2str(enum mlx5_ib_mmap_cmd cmd)
{
switch (cmd) {
@@ -3055,8 +2999,6 @@ static void *mlx5_ib_add(struct mlx5_core_dev *mdev)
dev->ib_dev.get_vf_stats = mlx5_ib_get_vf_stats;
dev->ib_dev.set_vf_guid = mlx5_ib_set_vf_guid;
}
-
- dev->ib_dev.disassociate_ucontext = mlx5_ib_disassociate_ucontext;
mlx5_ib_internal_fill_odp_caps(dev);
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