Commit 7eefda7f authored by Julian Wiedmann's avatar Julian Wiedmann Committed by David S. Miller

s390/qeth: fix notification for pending buffers during teardown

The cited commit reworked the state machine for pending TX buffers.
In qeth_iqd_tx_complete() it turned PENDING into a transient state, and
uses NEED_QAOB for buffers that get parked while waiting for their QAOB
completion.

But it missed to adjust the check in qeth_tx_complete_buf(). So if
qeth_tx_complete_pending_bufs() is called during teardown to drain
the parked TX buffers, we no longer raise a notification for af_iucv.

Instead of updating the checked state, just move this code into
qeth_tx_complete_pending_bufs() itself. This also gets rid of the
special-case in the common TX completion path.

Fixes: 8908f36d ("s390/qeth: fix af_iucv notification race")
Signed-off-by: default avatarJulian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3e83d467
......@@ -1390,9 +1390,6 @@ static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
struct qeth_qdio_out_q *queue = buf->q;
struct sk_buff *skb;
if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);
/* Empty buffer? */
if (buf->next_element_to_fill == 0)
return;
......@@ -1465,6 +1462,9 @@ static void qeth_tx_complete_pending_bufs(struct qeth_card *card,
QETH_CARD_TEXT(card, 5, "fp");
QETH_CARD_TEXT_(card, 5, "%lx", (long) buf);
if (drain)
qeth_notify_skbs(queue, buf,
TX_NOTIFY_GENERALERROR);
qeth_tx_complete_buf(buf, drain, 0);
list_del(&buf->list_entry);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment