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iwl3945: fix bugs in txq freeing

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When we free a txq that had no txb array allocated,
we still try to access it. Fix that, and also free
all SKBs that may be in the txb array (although it
can just be a single one).

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
This commit is contained in:
Johannes Berg 2010-05-17 02:37:31 -07:00 committed by Reinette Chatre
parent fc66be2a80
commit 4f5fa2376f
1 changed files with 8 additions and 6 deletions
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14
drivers/net/wireless/iwlwifi/iwl-3945.c
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@ -705,16 +705,18 @@ void iwl3945_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
for (i = 1; i < counter; i++) {
pci_unmap_single(dev, le32_to_cpu(tfd->tbs[i].addr),
le32_to_cpu(tfd->tbs[i].len), PCI_DMA_TODEVICE);
if (txq->txb[txq->q.read_ptr].skb[0]) {
struct sk_buff *skb = txq->txb[txq->q.read_ptr].skb[0];
if (txq->txb[txq->q.read_ptr].skb[0]) {
/* Can be called from interrupt context */
if (txq->txb) {
struct sk_buff *skb;
skb = txq->txb[txq->q.read_ptr].skb[i - 1];
/* can be called from irqs-disabled context */
if (skb) {
dev_kfree_skb_any(skb);
txq->txb[txq->q.read_ptr].skb[0] = NULL;
txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
}
}
}
return ;
}
/**