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s390/qeth: fix cancelling of TX timer on dev_close()

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With the introduction of TX coalescing, .ndo_start_xmit now potentially
starts the TX completion timer. So only kill the timer _after_ TX has
been disabled.

Fixes: ee1e52d1e4 ("s390/qeth: add TX IRQ coalescing support for IQD devices")
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 2020-05-04 19:39:42 +02:00 committed by David S. Miller
parent d975cb7ea9
commit c649c41d5d
1 changed files with 5 additions and 5 deletions
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10
drivers/s390/net/qeth_core_main.c
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@ -6717,17 +6717,17 @@ int qeth_stop(struct net_device *dev)
unsigned int i;
/* Quiesce the NAPI instances: */
qeth_for_each_output_queue(card, queue, i) {
qeth_for_each_output_queue(card, queue, i)
napi_disable(&queue->napi);
del_timer_sync(&queue->timer);
}
/* Stop .ndo_start_xmit, might still access queue->napi. */
netif_tx_disable(dev);
/* Queues may get re-allocated, so remove the NAPIs here. */
qeth_for_each_output_queue(card, queue, i)
qeth_for_each_output_queue(card, queue, i) {
del_timer_sync(&queue->timer);
/* Queues may get re-allocated, so remove the NAPIs. */
netif_napi_del(&queue->napi);
}
} else {
netif_tx_disable(dev);
}