Patch "s390/qeth: when thread completes, wake up all waiters" has been added to the 4.15-stable tree

Patch "s390/qeth: when thread completes, wake up all waiters" has been added to the 4.15-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

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

to the 4.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     s390-qeth-when-thread-completes-wake-up-all-waiters.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Wed Mar 28 18:37:51 CEST 2018
From: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Date: Tue, 20 Mar 2018 07:59:13 +0100
Subject: s390/qeth: when thread completes, wake up all waiters

From: Julian Wiedmann <jwi@linux.vnet.ibm.com>


[ 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>
---
 drivers/s390/net/qeth_core_main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -961,7 +961,7 @@ void qeth_clear_thread_running_bit(struc
 	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);
 


Patches currently in stable-queue which might be from jwi@linux.vnet.ibm.com are

queue-4.15/s390-qeth-when-thread-completes-wake-up-all-waiters.patch
queue-4.15/s390-qeth-lock-read-device-while-queueing-next-buffer.patch
queue-4.15/net-iucv-free-memory-obtained-by-kzalloc.patch
queue-4.15/s390-qeth-on-channel-error-reject-further-cmd-requests.patch
queue-4.15/s390-qeth-free-netdevice-when-removing-a-card.patch