diff options
| author | David S. Miller <davem@davemloft.net> | 2019-04-26 06:52:29 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-26 06:52:29 +0300 |
| commit | 8b4483658364f05b2e32845c8f445cdfd9452286 (patch) | |
| tree | 4734ef83378b1e90475ec4776ac72dfe16a7249b /drivers/infiniband/core | |
| parent | c049d56eb219661c9ae48d596c3e633973f89d1f (diff) | |
| parent | cd8dead0c39457e58ec1d36db93aedca811d48f1 (diff) | |
| download | linux-8b4483658364f05b2e32845c8f445cdfd9452286.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Two easy cases of overlapping changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/infiniband/core')
| -rw-r--r-- | drivers/infiniband/core/uverbs_main.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c index 70b7d80431a9..f2e7ffe6fc54 100644 --- a/drivers/infiniband/core/uverbs_main.c +++ b/drivers/infiniband/core/uverbs_main.c @@ -993,6 +993,8 @@ void uverbs_user_mmap_disassociate(struct ib_uverbs_file *ufile) * will only be one mm, so no big deal. */ down_write(&mm->mmap_sem); + if (!mmget_still_valid(mm)) + goto skip_mm; mutex_lock(&ufile->umap_lock); list_for_each_entry_safe (priv, next_priv, &ufile->umaps, list) { @@ -1007,6 +1009,7 @@ void uverbs_user_mmap_disassociate(struct ib_uverbs_file *ufile) vma->vm_flags &= ~(VM_SHARED | VM_MAYSHARE); } mutex_unlock(&ufile->umap_lock); + skip_mm: up_write(&mm->mmap_sem); mmput(mm); } |