iwlagn-fix-dma-direction.patch

1 files changed, 55 insertions, 0 deletions

diff --git a/iwlagn-fix-dma-direction.patch b/iwlagn-fix-dma-direction.patch
new file mode 100644
index 000000000..741276bf5
--- /dev/null
+++ b/iwlagn-fix-dma-direction.patch
@@ -0,0 +1,55 @@
+diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
+index 686e176..11da90a 100644
+--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
++++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
+@@ -126,7 +126,7 @@ static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
+ }
+ 
+ static void iwlagn_unmap_tfd(struct iwl_priv *priv, struct iwl_cmd_meta *meta,
+-			     struct iwl_tfd *tfd)
++			     struct iwl_tfd *tfd, enum dma_data_direction dma_dir)
+ {
+ 	struct pci_dev *dev = priv->pci_dev;
+ 	int i;
+@@ -151,7 +151,7 @@ static void iwlagn_unmap_tfd(struct iwl_priv *priv, struct iwl_cmd_meta *meta,
+ 	/* Unmap chunks, if any. */
+ 	for (i = 1; i < num_tbs; i++)
+ 		pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
+-				iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
++				iwl_tfd_tb_get_len(tfd, i), dma_dir);
+ }
+ 
+ /**
+@@ -167,7 +167,8 @@ void iwlagn_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
+ 	struct iwl_tfd *tfd_tmp = txq->tfds;
+ 	int index = txq->q.read_ptr;
+ 
+-	iwlagn_unmap_tfd(priv, &txq->meta[index], &tfd_tmp[index]);
++	iwlagn_unmap_tfd(priv, &txq->meta[index], &tfd_tmp[index],
++		PCI_DMA_TODEVICE);
+ 
+ 	/* free SKB */
+ 	if (txq->txb) {
+@@ -700,10 +701,11 @@ int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
+ 		if (!(cmd->dataflags[i] & IWL_HCMD_DFL_NOCOPY))
+ 			continue;
+ 		phys_addr = pci_map_single(priv->pci_dev, (void *)cmd->data[i],
+-					   cmd->len[i], PCI_DMA_TODEVICE);
++					   cmd->len[i], PCI_DMA_BIDIRECTIONAL);
+ 		if (pci_dma_mapping_error(priv->pci_dev, phys_addr)) {
+ 			iwlagn_unmap_tfd(priv, out_meta,
+-					 &txq->tfds[q->write_ptr]);
++					 &txq->tfds[q->write_ptr],
++					 PCI_DMA_BIDIRECTIONAL);
+ 			idx = -ENOMEM;
+ 			goto out;
+ 		}
+@@ -807,7 +809,7 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
+ 	cmd = txq->cmd[cmd_index];
+ 	meta = &txq->meta[cmd_index];
+ 
+-	iwlagn_unmap_tfd(priv, meta, &txq->tfds[index]);
++	iwlagn_unmap_tfd(priv, meta, &txq->tfds[index], PCI_DMA_BIDIRECTIONAL);
+ 
+ 	/* Input error checking is done when commands are added to queue. */
+ 	if (meta->flags & CMD_WANT_SKB) {