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Disable unsupported disassociate ucontext functionality in mlx5ib(4).

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MFC after:	1 week
Sponsored by:	Mellanox Technologies
This commit is contained in:
hselasky 2018-03-07 14:03:31 +00:00
parent 847a90f040
commit 13f5c3c4e7
1 changed files with 0 additions and 58 deletions
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58
sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c
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@ -1241,62 +1241,6 @@ static int mlx5_ib_set_vma_data(struct vm_area_struct *vma,
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) {
@ -3056,8 +3000,6 @@ static void *mlx5_ib_add(struct mlx5_core_dev *mdev)
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);
if (MLX5_CAP_GEN(mdev, imaicl)) {