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s390/qeth: keep cmd alive after IO completion 

Current code releases the cmd struct after its initial IO has completed.
Any reply processing is done independently, using a separate qeth_reply
struct.
In preparation for merging the cmd and reply structs together, take an
additional reference on the cmd object so that it stays around all the
way until qeth_send_control_data() returns.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Wiedmann 2019-08-20 16:46:38 +02:00 committed by David S. Miller
parent 7c5f8ffb33
commit 32e85a0d83
1 changed files with 7 additions and 2 deletions
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9
drivers/s390/net/qeth_core_main.c
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@ -1742,6 +1742,9 @@ static int qeth_send_control_data(struct qeth_card *card,
qeth_enqueue_reply(card, reply);
/* This pairs with iob->callback, and keeps the iob alive after IO: */
qeth_get_cmd(iob);
QETH_CARD_TEXT(card, 6, "noirqpnd");
spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
rc = ccw_device_start_timeout(channel->ccwdev, __ccw_from_cmd(iob),
@ -1752,11 +1755,10 @@ static int qeth_send_control_data(struct qeth_card *card,
CARD_DEVID(card), rc);
QETH_CARD_TEXT_(card, 2, " err%d", rc);
qeth_dequeue_reply(card, reply);
qeth_put_reply(reply);
qeth_put_cmd(iob);
atomic_set(&channel->irq_pending, 0);
wake_up(&card->wait_q);
return rc;
goto out;
}
timeout = wait_for_completion_interruptible_timeout(&reply->received,
@ -1777,7 +1779,10 @@ static int qeth_send_control_data(struct qeth_card *card,
if (!rc)
rc = reply->rc;
out:
qeth_put_reply(reply);
qeth_put_cmd(iob);
return rc;
}