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IB/umem: Indicate that process is being terminated 

When process is killed while pagefault operation still in progress -
function will fail. In this specific case we don't want any warnings in
dmesg to avoid log analyzers false alerts. So we need distinct error
code for this case.

Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
hifive-unleashed-5.1
Artemy Kovalyov 2017-01-18 16:58:08 +02:00 committed by Doug Ledford
parent d07d1d70ce
commit d9d0674c0f
1 changed files with 3 additions and 2 deletions
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5
drivers/infiniband/core/umem_odp.c
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@ -573,7 +573,8 @@ out:
* for failure.
* An -EAGAIN error code is returned when a concurrent mmu notifier prevents
* the function from completing its task.
*
* An -ENOENT error code indicates that userspace process is being terminated
* and mm was already destroyed.
* @umem: the umem to map and pin
* @user_virt: the address from which we need to map.
* @bcnt: the minimal number of bytes to pin and map. The mapping might be
@ -621,7 +622,7 @@ int ib_umem_odp_map_dma_pages(struct ib_umem *umem, u64 user_virt, u64 bcnt,
owning_mm = get_task_mm(owning_process);
if (owning_mm == NULL) {
ret = -EINVAL;
ret = -ENOENT;
goto out_put_task;
}