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s390/qeth: when thread completes, wake up all waiters

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[ Upstream commit 1063e432bb45be209427ed3f1ca3908e4aa3c7d7 ]

qeth_wait_for_threads() is potentially called by multiple users, make
sure to notify all of them after qeth_clear_thread_running_bit()
adjusted the thread_running_mask. With no timeout, callers would
otherwise stall.

Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Julian Wiedmann 2018-03-20 07:59:13 +01:00 committed by Greg Kroah-Hartman
parent b469bdd0f5
commit dd5ec73140
1 changed files with 1 additions and 1 deletions
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2
drivers/s390/net/qeth_core_main.c
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@ -961,7 +961,7 @@ void qeth_clear_thread_running_bit(struct qeth_card *card, unsigned long thread)
spin_lock_irqsave(&card->thread_mask_lock, flags);
card->thread_running_mask &= ~thread;
spin_unlock_irqrestore(&card->thread_mask_lock, flags);
wake_up(&card->wait_q);
wake_up_all(&card->wait_q);
}
EXPORT_SYMBOL_GPL(qeth_clear_thread_running_bit);