| commit | a702349a4099cd5a7bab0904689d8e0bf8dcd622 | [log] [tgz] |
|---|---|---|
| author | Julian Wiedmann <jwi@linux.ibm.com> | Thu Jul 19 12:43:48 2018 +0200 |
| committer | David S. Miller <davem@davemloft.net> | Sat Jul 21 10:12:29 2018 -0700 |
| tree | 9c4fecc85ff313af8459d3181fedf830d9962114 | |
| parent | d528114bd398b4edaeed370a96f874dff88c10f5 [diff] |
s390/qeth: fix race in used-buffer accounting By updating q->used_buffers only _after_ do_QDIO() has completed, there is a potential race against the buffer's TX completion. In the unlikely case that the TX completion path wins, qeth_qdio_output_handler() would decrement the counter before qeth_flush_buffers() even incremented it. Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>