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| author | Wei Hu(Xavier) <xavier.huwei@huawei.com> | 2018-05-28 13:39:26 +0200 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2018-05-31 02:45:03 +0200 |
| commit | a0976f418daf6f93c3c572767f0cf1e770df4717 (patch) | |
| tree | 2bd486c5ef6ccc907dac3758fa43c37b0cea2709 /drivers/infiniband/hw/mlx5/main.c | |
| parent | RDMA/hns: Fix the illegal memory operation when cross page (diff) | |
| download | linux-a0976f418daf6f93c3c572767f0cf1e770df4717.tar.xz linux-a0976f418daf6f93c3c572767f0cf1e770df4717.zip | |
RDMA/uverbs: Hoist the common process of disassociate_ucontext into ib core
This patch hoisted the common process of disassociate_ucontext
callback function into ib core code, and these code are common
to ervery ib_device driver.
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/main.c | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 92879d2d3026..a182d19c557e 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -1973,38 +1973,7 @@ static void mlx5_ib_disassociate_ucontext(struct ib_ucontext *ibcontext) 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_write(&owning_mm->mmap_sem); mutex_lock(&context->vma_private_list_mutex); list_for_each_entry_safe(vma_private, n, &context->vma_private_list, list) { @@ -2021,9 +1990,6 @@ static void mlx5_ib_disassociate_ucontext(struct ib_ucontext *ibcontext) kfree(vma_private); } mutex_unlock(&context->vma_private_list_mutex); - up_write(&owning_mm->mmap_sem); - mmput(owning_mm); - put_task_struct(owning_process); } static inline char *mmap_cmd2str(enum mlx5_ib_mmap_cmd cmd) |