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ceph: fix double page_unlock() in page_mkwrite() 

ceph_update_writeable_page() unlocks the page on errors, so
page_mkwrite() should not unlock the page again.

Signed-off-by: Yan, Zheng <zyan@redhat.com>
This commit is contained in:
Yan, Zheng 2015-12-17 15:36:39 +08:00 committed by Ilya Dryomov
parent 1761b22966
commit f9cac5ac08
1 changed files with 4 additions and 4 deletions
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8
fs/ceph/addr.c
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@ -1378,11 +1378,13 @@ static int ceph_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
ret = VM_FAULT_NOPAGE;
if ((off > size) ||
(page->mapping != inode->i_mapping))
(page->mapping != inode->i_mapping)) {
unlock_page(page);
goto out;
}
ret = ceph_update_writeable_page(vma->vm_file, off, len, page);
if (ret == 0) {
if (ret >= 0) {
/* success. we'll keep the page locked. */
set_page_dirty(page);
ret = VM_FAULT_LOCKED;
@ -1393,8 +1395,6 @@ static int ceph_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
ret = VM_FAULT_SIGBUS;
}
out:
if (ret != VM_FAULT_LOCKED)
unlock_page(page);
if (ret == VM_FAULT_LOCKED ||
ci->i_inline_version != CEPH_INLINE_NONE) {
int dirty;