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| author | Henry C Chang <henry_c_chang@tcloudcomputing.com> | 2010-12-17 18:55:59 +0100 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2010-12-17 18:55:59 +0100 |
| commit | 361cf40519a491f68b28ad90225e4611c4bf8e12 (patch) | |
| tree | ac0a77f2d6b36d4140bbaf3b8c14a37e8ae1ef11 | |
| parent | ceph: mark user pages dirty on direct-io reads (diff) | |
| download | linux-361cf40519a491f68b28ad90225e4611c4bf8e12.tar.xz linux-361cf40519a491f68b28ad90225e4611c4bf8e12.zip | |
ceph: handle partial result from get_user_pages
The get_user_pages() helper can return fewer than the requested pages.
Error out in that case, and clean up the partial result.
Signed-off-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
| -rw-r--r-- | net/ceph/pagevec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c index 01947a5d03b7..1a040e64c69f 100644 --- a/net/ceph/pagevec.c +++ b/net/ceph/pagevec.c @@ -26,12 +26,12 @@ struct page **ceph_get_direct_page_vector(const char __user *data, rc = get_user_pages(current, current->mm, (unsigned long)data, num_pages, write_page, 0, pages, NULL); up_read(¤t->mm->mmap_sem); - if (rc < 0) + if (rc < num_pages) goto fail; return pages; fail: - kfree(pages); + ceph_put_page_vector(pages, rc > 0 ? rc : 0, false); return ERR_PTR(rc); } EXPORT_SYMBOL(ceph_get_direct_page_vector); |