linux-kernel - [PATCH net-next v2 3/3] r8152: check RTL8152_UNPLUG and netif

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Message-ID: <1394712342-15778-82-Taiwan-albertk@realtek.com>
Date:	Fri, 31 Oct 2014 17:56:42 +0800
From:	Hayes Wang <hayeswang@...ltek.com>
To:	<netdev@...r.kernel.org>
CC:	<nic_swsd@...ltek.com>, <linux-kernel@...r.kernel.org>,
	<linux-usb@...r.kernel.org>, Hayes Wang <hayeswang@...ltek.com>
Subject: [PATCH net-next v2 3/3] r8152: check RTL8152_UNPLUG and netif_running before autoresume

If the device is unplugged or !netif_running(), the workqueue
doesn't need to wake the device, and could return directly.

Signed-off-by: Hayes Wang <hayeswang@...ltek.com>
---
 drivers/net/usb/r8152.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 670279a..90cc89c 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -2859,15 +2859,18 @@ static void rtl_work_func_t(struct work_struct *work)
 {
 	struct r8152 *tp = container_of(work, struct r8152, schedule.work);
 
+	/* If the device is unplugged or !netif_running(), the workqueue
+	 * doesn't need to wake the device, and could return directly.
+	 */
+	if (test_bit(RTL8152_UNPLUG, &tp->flags) || !netif_running(tp->netdev))
+		return;
+
 	if (usb_autopm_get_interface(tp->intf) < 0)
 		return;
 
 	if (!test_bit(WORK_ENABLE, &tp->flags))
 		goto out1;
 
-	if (test_bit(RTL8152_UNPLUG, &tp->flags))
-		goto out1;
-
 	if (!mutex_trylock(&tp->control)) {
 		schedule_delayed_work(&tp->schedule, 0);
 		goto out1;
-- 
1.9.3

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