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Disable unsupported disassociate ucontext functionality in mlx4ib(4).

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MFC after:	1 week
Sponsored by:	Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2018-03-07 13:57:32 +00:00
parent fd5b330b19
commit 54b55cbdd9
1 changed files with 0 additions and 63 deletions
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63
sys/dev/mlx4/mlx4_ib/mlx4_ib_main.c
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@ -1135,68 +1135,6 @@ static const struct vm_operations_struct mlx4_ib_vm_ops = {
.close = mlx4_ib_vma_close
};
static void mlx4_ib_disassociate_ucontext(struct ib_ucontext *ibcontext)
{
int i;
int ret = 0;
struct vm_area_struct *vma;
struct mlx4_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) {
/* make sure that task is dead before returning, it may
* prevent a rare case of module down in parallel to a
* call to mlx4_ib_vma_close.
*/
put_task_struct(owning_process);
msleep(1);
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
* mlx4_ib_vma_close().
*/
down_read(&owning_mm->mmap_sem);
for (i = 0; i < HW_BAR_COUNT; i++) {
vma = context->hw_bar_info[i].vma;
if (!vma)
continue;
ret = zap_vma_ptes(context->hw_bar_info[i].vma,
context->hw_bar_info[i].vma->vm_start,
PAGE_SIZE);
if (ret) {
pr_err("Error: zap_vma_ptes failed for index=%d, ret=%d\n", i, ret);
BUG_ON(1);
}
/* context going to be destroyed, should not access ops any more */
context->hw_bar_info[i].vma->vm_ops = NULL;
}
up_read(&owning_mm->mmap_sem);
mmput(owning_mm);
put_task_struct(owning_process);
}
static void mlx4_ib_set_vma_data(struct vm_area_struct *vma,
struct mlx4_ib_vma_private_data *vma_private_data)
{
@ -2694,7 +2632,6 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
ibdev->ib_dev.process_mad = mlx4_ib_process_mad;
ibdev->ib_dev.get_port_immutable = mlx4_port_immutable;
ibdev->ib_dev.get_dev_fw_str = get_fw_ver_str;
ibdev->ib_dev.disassociate_ucontext = mlx4_ib_disassociate_ucontext;
if (!mlx4_is_slave(ibdev->dev)) {
ibdev->ib_dev.alloc_fmr = mlx4_ib_fmr_alloc;