netdev - [PATCH 1/3] usbnet: clear OPEN flag in failure path

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Message-Id: <1339561217-18151-2-git-send-email-ming.lei@canonical.com>
Date:	Wed, 13 Jun 2012 12:20:15 +0800
From:	Ming Lei <ming.lei@...onical.com>
To:	"David S. Miller" <davem@...emloft.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Oliver Neukum <oneukum@...e.de>, netdev@...r.kernel.org,
	linux-usb@...r.kernel.org, Ming Lei <ming.lei@...onical.com>,
	stable@...r.kernel.org
Subject: [PATCH 1/3] usbnet: clear OPEN flag in failure path

Without clearing OPEN flag in failure path, runtime or system resume
may submit interrupt/rx URB and start tx queue mistakenly on a
interface in DOWN state.

Cc: stable@...r.kernel.org
Signed-off-by: Ming Lei <ming.lei@...onical.com>
---
 drivers/net/usb/usbnet.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index ac2e493..f06cf9b 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -793,11 +793,13 @@ int usbnet_open (struct net_device *net)
 	if (info->manage_power) {
 		retval = info->manage_power(dev, 1);
 		if (retval < 0)
-			goto done;
+			goto done_manage_power_error;
 		usb_autopm_put_interface(dev->intf);
 	}
 	return retval;
 
+done_manage_power_error:
+	clear_bit(EVENT_DEV_OPEN, &dev->flags);
 done:
 	usb_autopm_put_interface(dev->intf);
 done_nopm:
-- 
1.7.9.5

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