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>
rc = get_user_pages(current, current->mm, (unsigned long)data,
num_pages, write_page, 0, pages, NULL);
up_read(¤t->mm->mmap_sem);
rc = get_user_pages(current, current->mm, (unsigned long)data,
num_pages, write_page, 0, pages, NULL);
up_read(¤t->mm->mmap_sem);
goto fail;
return pages;
fail:
goto fail;
return pages;
fail:
+ ceph_put_page_vector(pages, rc > 0 ? rc : 0, false);
return ERR_PTR(rc);
}
EXPORT_SYMBOL(ceph_get_direct_page_vector);
return ERR_PTR(rc);
}
EXPORT_SYMBOL(ceph_get_direct_page_vector);