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author | Wei Hu(Xavier) <xavier.huwei@huawei.com> | 2018-05-28 19:39:26 +0800 |
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committer | Doug Ledford <dledford@redhat.com> | 2018-05-30 20:45:03 -0400 |
commit | a0976f418daf6f93c3c572767f0cf1e770df4717 (patch) | |
tree | 2bd486c5ef6ccc907dac3758fa43c37b0cea2709 /drivers/infiniband/hw/mlx4/main.c | |
parent | 0b25c9cc53b5c0f87fab5e3cab0ff64e8d4ccc0b (diff) | |
download | linux-a0976f418daf6f93c3c572767f0cf1e770df4717.tar.bz2 |
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 'drivers/infiniband/hw/mlx4/main.c')
-rw-r--r-- | drivers/infiniband/hw/mlx4/main.c | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c index bf12394c13c1..59aed458d3be 100644 --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -1189,40 +1189,10 @@ static void mlx4_ib_disassociate_ucontext(struct ib_ucontext *ibcontext) 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); - 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 * mlx4_ib_vma_close(). */ - down_write(&owning_mm->mmap_sem); for (i = 0; i < HW_BAR_COUNT; i++) { vma = context->hw_bar_info[i].vma; if (!vma) @@ -1241,10 +1211,6 @@ static void mlx4_ib_disassociate_ucontext(struct ib_ucontext *ibcontext) /* context going to be destroyed, should not access ops any more */ context->hw_bar_info[i].vma->vm_ops = NULL; } - - up_write(&owning_mm->mmap_sem); - mmput(owning_mm); - put_task_struct(owning_process); } static void mlx4_ib_set_vma_data(struct vm_area_struct *vma, |