In iomap_write_end, we're not holding a page reference anymore when
calling the page_done callback, but the callback needs that reference to
access the page. To fix that, move the put_page call in
__generic_write_end into the callers of __generic_write_end. Then, in
iomap_write_end, put the page after calling the page_done callback.
Reported-by: Jan Kara <jack@suse.cz>
Fixes: 63899c6f8851 ("iomap: add a page_done callback")
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
}
unlock_page(page);
- put_page(page);
if (old_size < pos)
pagecache_isize_extended(inode, old_size, pos);
{
copied = block_write_end(file, mapping, pos, len, copied, page, fsdata);
__generic_write_end(mapping->host, pos, copied, page);
+ put_page(page);
return copied;
}
EXPORT_SYMBOL(generic_write_end);
__generic_write_end(inode, pos, ret, page);
if (iomap->page_done)
iomap->page_done(inode, pos, copied, page, iomap);
+ put_page(page);
if (ret < len)
iomap_write_failed(inode, pos, len);