linux-kernel - [PATCH V2 1/1] staging: usbip: remove an unnecessary lock in usbip_event

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Message-Id: <1352109071-10696-1-git-send-email-harvey.huawei.yang@gmail.com>
Date:	Mon,  5 Nov 2012 17:51:11 +0800
From:	"harvey.yang" <harvey.huawei.yang@...il.com>
To:	Matt Mooney <mfm@...eddisk.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, harvey.huawei.yang@...il.com
Subject: [PATCH V2 1/1] staging: usbip: remove an unnecessary lock in usbip_event_happened.

From: Harvey.Yang <harvey.huawei.yang@...il.com>


Signed-off-by: Harvey.Yang <harvey.huawei.yang@...il.com>
---
 drivers/staging/usbip/usbip_common.h |    2 +-
 drivers/staging/usbip/usbip_event.c  |   11 ++---------
 2 files changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/staging/usbip/usbip_common.h b/drivers/staging/usbip/usbip_common.h
index 5d89c0f..b6d7add 100644
--- a/drivers/staging/usbip/usbip_common.h
+++ b/drivers/staging/usbip/usbip_common.h
@@ -330,7 +330,7 @@ int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb);
 int usbip_start_eh(struct usbip_device *ud);
 void usbip_stop_eh(struct usbip_device *ud);
 void usbip_event_add(struct usbip_device *ud, unsigned long event);
-int usbip_event_happened(struct usbip_device *ud);
+inline int usbip_event_happened(struct usbip_device *ud);
 
 static inline int interface_to_busnum(struct usb_interface *interface)
 {
diff --git a/drivers/staging/usbip/usbip_event.c b/drivers/staging/usbip/usbip_event.c
index d332a34..15871f0 100644
--- a/drivers/staging/usbip/usbip_event.c
+++ b/drivers/staging/usbip/usbip_event.c
@@ -112,15 +112,8 @@ void usbip_event_add(struct usbip_device *ud, unsigned long event)
 }
 EXPORT_SYMBOL_GPL(usbip_event_add);
 
-int usbip_event_happened(struct usbip_device *ud)
+inline int usbip_event_happened(struct usbip_device *ud)
 {
-	int happened = 0;
-
-	spin_lock(&ud->lock);
-	if (ud->event != 0)
-		happened = 1;
-	spin_unlock(&ud->lock);
-
-	return happened;
+	return ud->event ? 1 : 0;
 }
 EXPORT_SYMBOL_GPL(usbip_event_happened);
-- 
1.7.1

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