| commit | 31339acd07b4ba687906702085127895a56eb920 | [log] [tgz] |
|---|---|---|
| author | Chris Mason <chris.mason@oracle.com> | Mon Mar 07 11:10:24 2011 -0500 |
| committer | Chris Mason <chris.mason@oracle.com> | Mon Mar 07 11:10:24 2011 -0500 |
| tree | c1f2d464acfc97e8c5faecf57e644578cccce94d | |
| parent | b1bf862e9dad431175a1174379476299dbfdc017 [diff] |
Btrfs: deal with short returns from copy_from_user When copy_from_user is only able to copy some of the bytes we requested, we may end up creating a partially up to date page. To avoid garbage in the page, we need to treat a partial copy as a zero length copy. This makes the rest of the file_write code drop the page and retry the whole copy instead of marking the partially up to date page as dirty. Signed-off-by: Chris Mason <chris.mason@oracle.com> cc: stable@kernel.org