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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-07-24 16:51:18 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-07-24 16:51:18 -0700 |
| commit | 53a7ff8fb785839b87f950fd85433d9c662fac89 (patch) | |
| tree | 119840a23e5226d3f258e2309b4ef1d328535dd2 /drivers/infiniband/core/umem_odp.c | |
| parent | 4323418d62fefe48ee5019f2c744c918be06ec69 (diff) | |
| parent | 072a7852338af900c302490474939e089f4bd4c4 (diff) | |
Merge branch 'bind_unbind' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core into next
This brings in devm_device_add_group() and friends so that we can create
driver-specific device attributes as managed resources.
Diffstat (limited to 'drivers/infiniband/core/umem_odp.c')
| -rw-r--r-- | drivers/infiniband/core/umem_odp.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/infiniband/core/umem_odp.c b/drivers/infiniband/core/umem_odp.c index 0780b1afefa9..8c4ec564e495 100644 --- a/drivers/infiniband/core/umem_odp.c +++ b/drivers/infiniband/core/umem_odp.c @@ -321,11 +321,15 @@ int ib_umem_odp_get(struct ib_ucontext *context, struct ib_umem *umem, struct vm_area_struct *vma; struct hstate *h; + down_read(&mm->mmap_sem); vma = find_vma(mm, ib_umem_start(umem)); - if (!vma || !is_vm_hugetlb_page(vma)) + if (!vma || !is_vm_hugetlb_page(vma)) { + up_read(&mm->mmap_sem); return -EINVAL; + } h = hstate_vma(vma); umem->page_shift = huge_page_shift(h); + up_read(&mm->mmap_sem); umem->hugetlb = 1; } else { umem->hugetlb = 0; |