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qeth: add wake_up on write channel 

To send commands on the write channel 8 buffers exist. If all
8 buffers are used, a wait is triggered on the write channel. When
such buffer are freed, a wake_up is needed. This patch adds the
missing wake_up in qeth_release_buffer().
This fix is especially important when running Communications
Controller for Linux on System z.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun 2012-02-08 00:19:50 +00:00 committed by David S. Miller
parent c3ab96f36a
commit 039055b965
1 changed files with 1 additions and 0 deletions
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1
drivers/s390/net/qeth_core_main.c
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@ -678,6 +678,7 @@ void qeth_release_buffer(struct qeth_channel *channel,
iob->callback = qeth_send_control_data_cb; iob->callback = qeth_send_control_data_cb;
iob->rc = 0; iob->rc = 0;
spin_unlock_irqrestore(&channel->iob_lock, flags); spin_unlock_irqrestore(&channel->iob_lock, flags);
wake_up(&channel->wait_q);
} }
EXPORT_SYMBOL_GPL(qeth_release_buffer); EXPORT_SYMBOL_GPL(qeth_release_buffer);