linux-kernel - [PATCH 1/2] drivers: staging: wilc1000: Move spin lock to the start of critical section

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Message-Id: <1443864450-18167-1-git-send-email-csgorentla@gmail.com>
Date:	Sat,  3 Oct 2015 14:57:29 +0530
From:	Chandra S Gorentla <csgorentla@...il.com>
To:	gregkh@...uxfoundation.org
Cc:	dan.carpenter@...cle.com, johnny.kim@...el.com,
	rachel.kim@...el.com, chris.park@...el.com,
	linux-wireless@...r.kernel.org, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org,
	Chandra S Gorentla <csgorentla@...il.com>
Subject: [PATCH 1/2] drivers: staging: wilc1000: Move spin lock to the start of critical section

The spin_lock_irqsave is moved to just beginning of critical section.
This change moves a couple of return statements out of the lock.

Signed-off-by: Chandra S Gorentla <csgorentla@...il.com>
---
 drivers/staging/wilc1000/wilc_msgqueue.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/wilc1000/wilc_msgqueue.c b/drivers/staging/wilc1000/wilc_msgqueue.c
index d5ebd6d..284a3f5 100644
--- a/drivers/staging/wilc1000/wilc_msgqueue.c
+++ b/drivers/staging/wilc1000/wilc_msgqueue.c
@@ -72,8 +72,6 @@ int wilc_mq_send(WILC_MsgQueueHandle *pHandle,
 		goto ERRORHANDLER;
 	}
 
-	spin_lock_irqsave(&pHandle->strCriticalSection, flags);
-
 	/* construct a new message */
 	pstrMessage = kmalloc(sizeof(Message), GFP_ATOMIC);
 	if (!pstrMessage)
@@ -87,6 +85,8 @@ int wilc_mq_send(WILC_MsgQueueHandle *pHandle,
 	}
 	memcpy(pstrMessage->pvBuffer, pvSendBuffer, u32SendBufferSize);
 
+	spin_lock_irqsave(&pHandle->strCriticalSection, flags);
+
 	/* add it to the message queue */
 	if (!pHandle->pstrMessageList) {
 		pHandle->pstrMessageList  = pstrMessage;
-- 
2.1.4

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