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

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 <[email protected]> know about it.

From: Logan Gunthorpe <[email protected]>
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 <[email protected]>

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.

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

@@ -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 [email protected] are

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