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RDMA/uverbs: Hoist the common process of disassociate_ucontext into ib core

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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>
This commit is contained in:
Wei Hu(Xavier)
2018-05-28 19:39:26 +08:00
committed by Doug Ledford
parent 0b25c9cc53
commit a0976f418d
3 changed files with 41 additions and 69 deletions
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34
drivers/infiniband/hw/mlx4/main.c
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@@ -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,