From: Reinette Chatre <reinette.chatre@xxxxxxxxx>
During preparation of TX we create DMA mapping to TX command as part of
preparing the TFD. This mapping needs to be cleared at the time TFD is
freed.
Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
---
drivers/net/wireless/iwlwifi/iwl-3945.c | 10 +++++++++-
1 files changed, 9 insertions(+), 1 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 9e6f9ec..ba7e720 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -741,7 +741,8 @@ int iwl3945_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
void iwl3945_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
{
struct iwl3945_tfd *tfd_tmp = (struct iwl3945_tfd *)txq->tfds;
- struct iwl3945_tfd *tfd = &tfd_tmp[txq->q.read_ptr];
+ int index = txq->q.read_ptr;
+ struct iwl3945_tfd *tfd = &tfd_tmp[index];
struct pci_dev *dev = priv->pci_dev;
int i;
int counter;
@@ -759,6 +760,13 @@ void iwl3945_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
return;
}
+ /* Unmap tx_cmd */
+ if (counter)
+ pci_unmap_single(dev,
+ pci_unmap_addr(&txq->cmd[index]->meta, mapping),
+ pci_unmap_len(&txq->cmd[index]->meta, len),
+ PCI_DMA_TODEVICE);
+
/* unmap chunks if any */
for (i = 1; i < counter; i++) {
--
1.5.6.3
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