diff options
| author | Julian Wiedmann <jwi@linux.ibm.com> | 2021-03-09 19:52:21 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-17 19:06:21 +0300 |
| commit | f91a299fb160a3ffc969d39d3633e109ef5853f7 (patch) | |
| tree | 0563ef9fac022692cfde42062429a651a7db04f5 /drivers/s390 | |
| parent | f7a7d3ede5f51c1d24d530d6d18fc4f6d8177f82 (diff) | |
| download | linux-f91a299fb160a3ffc969d39d3633e109ef5853f7.tar.xz | |
s390/qeth: fix notification for pending buffers during teardown
[ Upstream commit 7eefda7f353ef86ad82a2dc8329e8a3538c08ab6 ]
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: 8908f36d20d8 ("s390/qeth: fix af_iucv notification race")
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/net/qeth_core_main.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index db785030293b..03f96177e58e 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -1383,9 +1383,6 @@ 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; @@ -1458,6 +1455,9 @@ 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); |