Patch "ntb: ntb_test: ensure the link is up before trying to configure the mws" has been added to the 4.12-stable tree

Patch "ntb: ntb_test: ensure the link is up before trying to configure the mws" has been added to the 4.12-stable tree

[gregkh]

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

    ntb: ntb_test: ensure the link is up before trying to configure the mws

to the 4.12-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:
     ntb-ntb_test-ensure-the-link-is-up-before-trying-to-configure-the-mws.patch
and it can be found in the queue-4.12 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 0eb46345364d7318b11068c46e8a68d5dc10f65e Mon Sep 17 00:00:00 2001
From: Logan Gunthorpe <logang@deltatee.com>
Date: Tue, 25 Jul 2017 14:57:42 -0600
Subject: ntb: ntb_test: ensure the link is up before trying to configure the mws

From: Logan Gunthorpe <logang@deltatee.com>

commit 0eb46345364d7318b11068c46e8a68d5dc10f65e upstream.

After the link tests, there is a race on one side of the test for
the link coming up. It's possible, in some cases, for the test script
to write to the 'peer_trans' files before the link has come up.

To fix this, we simply use the link event file to ensure both sides
see the link as up before continuning.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Acked-by: Allen Hubbe <Allen.Hubbe@dell.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Fixes: a9c59ef77458 ("ntb_test: Add a selftest script for the NTB subsystem")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 tools/testing/selftests/ntb/ntb_test.sh |    4 ++++
 1 file changed, 4 insertions(+)

--- a/tools/testing/selftests/ntb/ntb_test.sh
+++ b/tools/testing/selftests/ntb/ntb_test.sh
@@ -326,6 +326,10 @@ function ntb_tool_tests()
 	link_test $LOCAL_TOOL $REMOTE_TOOL
 	link_test $REMOTE_TOOL $LOCAL_TOOL
 
+	#Ensure the link is up on both sides before continuing
+	write_file Y $LOCAL_TOOL/link_event
+	write_file Y $REMOTE_TOOL/link_event
+
 	for PEER_TRANS in $(ls $LOCAL_TOOL/peer_trans*); do
 		PT=$(basename $PEER_TRANS)
 		write_file $MW_SIZE $LOCAL_TOOL/$PT


Patches currently in stable-queue which might be from logang@deltatee.com are

queue-4.12/ntb-ntb_test-ensure-the-link-is-up-before-trying-to-configure-the-mws.patch