netdev - [PATCH 1/2] xen-netfront: fix oops when disconnected from backend

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Date:	Wed, 18 Jun 2014 10:47:27 +0100
From:	David Vrabel <david.vrabel@...rix.com>
To:	<netdev@...r.kernel.org>
CC:	<xen-devel@...ts.xenproject.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	"David Vrabel" <david.vrabel@...rix.com>
Subject: [PATCH 1/2] xen-netfront: fix oops when disconnected from backend

xennet_disconnect_backend() was not correctly iterating over all the
queues.

Signed-off-by: David Vrabel <david.vrabel@...rix.com>
---
 drivers/net/xen-netfront.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 5a7872a..daaf1e5 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -1287,7 +1287,7 @@ static irqreturn_t xennet_rx_interrupt(int irq, void *dev_id)
 
 	if (likely(netif_carrier_ok(dev) &&
 		   RING_HAS_UNCONSUMED_RESPONSES(&queue->rx)))
-			napi_schedule(&queue->napi);
+		napi_schedule(&queue->napi);
 
 	return IRQ_HANDLED;
 }
@@ -1437,10 +1437,11 @@ static void xennet_end_access(int ref, void *page)
 static void xennet_disconnect_backend(struct netfront_info *info)
 {
 	unsigned int i = 0;
-	struct netfront_queue *queue = NULL;
 	unsigned int num_queues = info->netdev->real_num_tx_queues;
 
 	for (i = 0; i < num_queues; ++i) {
+		struct netfront_queue *queue = &info->queues[i];
+
 		/* Stop old i/f to prevent errors whilst we rebuild the state. */
 		spin_lock_bh(&queue->rx_lock);
 		spin_lock_irq(&queue->tx_lock);
-- 
1.7.10.4

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