linux-kernel - [PATCH 1/4] misc: mic: scif: use complete() instead of complete

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Date:	Fri,  5 Aug 2016 11:26:00 +0200
From:	Daniel Wagner <wagi@...om.org>
To:	linux-kernel@...r.kernel.org
Cc:	Alex Dubov <oakad@...oo.com>,
	Ashutosh Dixit <ashutosh.dixit@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sudeep Dutt <sudeep.dutt@...el.com>,
	Wolfram Sang <wsa@...-dreams.de>,
	Daniel Wagner <daniel.wagner@...-carit.de>
Subject: [PATCH 1/4] misc: mic: scif: use complete() instead of complete_all()

From: Daniel Wagner <daniel.wagner@...-carit.de>

There is only one waiter for the completion, therefore there
is no need to use complete_all(). Let's make that clear by
using complete() instead of complete_all().

The usage pattern of the completion is:

waiter context                          waker context

scif_get_node_info()
  DECLARE_COMPLETION_ONSTACK(node_info);
  msg->payload[3] = node_info
  scif_nodeqp_send()
  wait_for_completion(node_info)

                                        scif_get_node_info_resp()
                                          node_info = msg->payload[3]
                                          complete(node_info)

Signed-off-by: Daniel Wagner <daniel.wagner@...-carit.de>
---
 drivers/misc/mic/scif/scif_nodeqp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/mic/scif/scif_nodeqp.c b/drivers/misc/mic/scif/scif_nodeqp.c
index c66ca1a..c9b3b64 100644
--- a/drivers/misc/mic/scif/scif_nodeqp.c
+++ b/drivers/misc/mic/scif/scif_nodeqp.c
@@ -1009,7 +1009,7 @@ scif_get_node_info_resp(struct scif_dev *scifdev, struct scifmsg *msg)
 		mutex_lock(&scif_info.conflock);
 		scif_info.maxid = msg->payload[1];
 		scif_info.total = msg->payload[2];
-		complete_all(node_info);
+		complete(node_info);
 		mutex_unlock(&scif_info.conflock);
 	}
 }
-- 
2.7.4