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iwl3945: unmap previously mapped memory

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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@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Reinette Chatre 2009-03-11 11:17:58 -07:00 committed by John W. Linville
parent 732587ab43
commit fd9377ee6c
1 changed files with 9 additions and 1 deletions
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10
drivers/net/wireless/iwlwifi/iwl-3945.c
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@ -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++) {