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authorChristophe JAILLET <christophe.jaillet@wanadoo.fr>2017-12-15 02:33:08 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-12-15 03:00:48 +0300
commit1f704fd0d14043e76e80f6b8b2251b9b2cedcca6 (patch)
tree0f6c3fb84b701285161ef2f757f7c555795a826b /mm/frame_vector.c
parent0b265c3b3b721dca03e82719ac0e15bc2c89aa3a (diff)
downloadlinux-1f704fd0d14043e76e80f6b8b2251b9b2cedcca6.tar.xz
mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()'
A semaphore is acquired before this check, so we must release it before leaving. Link: http://lkml.kernel.org/r/20171211211009.4971-1-christophe.jaillet@wanadoo.fr Fixes: b7f0554a56f2 ("mm: fail get_vaddr_frames() for filesystem-dax mappings") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: David Sterba <dsterba@suse.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/frame_vector.c')
-rw-r--r--mm/frame_vector.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/frame_vector.c b/mm/frame_vector.c
index 297c7238f7d4..c64dca6e27c2 100644
--- a/mm/frame_vector.c
+++ b/mm/frame_vector.c
@@ -62,8 +62,10 @@ int get_vaddr_frames(unsigned long start, unsigned int nr_frames,
* get_user_pages_longterm() and disallow it for filesystem-dax
* mappings.
*/
- if (vma_is_fsdax(vma))
- return -EOPNOTSUPP;
+ if (vma_is_fsdax(vma)) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
if (!(vma->vm_flags & (VM_IO | VM_PFNMAP))) {
vec->got_ref = true;