rt2x00: Fix queue related oops in case of deselected mac80211 multi-queue feature.

With the integration of the mac80211 multiqueue patches it has become possible that the
mac80211 layer modifies the number of TX queues that is stored inside the ieee80211_hw
structure, especially when multi-queue is not selected.

The rt2x00 drivers are not well suited to handle that situation, as they allocate the
queue structures before mac80211 has modified the number of queues it is going to use,
and also expect the number of allocated queues to match the hardware implementation.

Hence, ensure that rt2x00 maintains by itself the number of queues that the hardware
supports, and, at the same time, making is not dependent on the preservation of contents
inside a mac80211 structure.

Signed-off-by: Gertjan van Wingerde <gwingerde@kpnplanet.nl>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00queue.c b/drivers/net/wireless/rt2x00/rt2x00queue.c
index e5b861f8416d..95f8dd3462f6 100644
--- a/drivers/net/wireless/rt2x00/rt2x00queue.c
+++ b/drivers/net/wireless/rt2x00/rt2x00queue.c
@@ -34,7 +34,7 @@ struct data_queue *rt2x00queue_get_queue(struct rt2x00_dev *rt2x00dev,
 {
         int atim = test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags);
 
-        if (queue < rt2x00dev->hw->queues && rt2x00dev->tx)
+        if (queue < rt2x00dev->ops->tx_queues && rt2x00dev->tx)
                 return &rt2x00dev->tx[queue];
 
         if (!rt2x00dev->bcn)
@@ -255,11 +255,11 @@ int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev)
         /*
          * We need the following queues:
          * RX: 1
-         * TX: hw->queues
+         * TX: ops->tx_queues
          * Beacon: 1
          * Atim: 1 (if required)
          */
-        rt2x00dev->data_queues = 2 + rt2x00dev->hw->queues + req_atim;
+        rt2x00dev->data_queues = 2 + rt2x00dev->ops->tx_queues + req_atim;
 
         queue = kzalloc(rt2x00dev->data_queues * sizeof(*queue), GFP_KERNEL);
         if (!queue) {
@@ -272,7 +272,7 @@ int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev)
          */
         rt2x00dev->rx = queue;
         rt2x00dev->tx = &queue[1];
-        rt2x00dev->bcn = &queue[1 + rt2x00dev->hw->queues];
+        rt2x00dev->bcn = &queue[1 + rt2x00dev->ops->tx_queues];
 
         /*
          * Initialize queue parameters.