qtnfmac: fix releasing Tx/Rx data buffers
Add missing PCI unmap for Tx buffers and release all buffers explicitly. Managed release using devm_add_action is not suitable for qtnfmac Tx/Rx data buffers. The reason is in ordering and dependencies: buffers should be released after transmission is stopped but before PCI device resources and DMA allocations are released. Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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@ -478,10 +478,11 @@ static int alloc_rx_buffers(struct qtnf_pcie_bus_priv *priv)
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}
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}
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/* all rx/tx activity should have ceased before calling this function */
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/* all rx/tx activity should have ceased before calling this function */
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static void free_xfer_buffers(void *data)
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static void qtnf_free_xfer_buffers(struct qtnf_pcie_bus_priv *priv)
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{
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{
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struct qtnf_pcie_bus_priv *priv = (struct qtnf_pcie_bus_priv *)data;
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struct qtnf_tx_bd *txbd;
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struct qtnf_rx_bd *rxbd;
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struct qtnf_rx_bd *rxbd;
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struct sk_buff *skb;
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dma_addr_t paddr;
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dma_addr_t paddr;
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int i;
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int i;
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@ -489,19 +490,26 @@ static void free_xfer_buffers(void *data)
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for (i = 0; i < priv->rx_bd_num; i++) {
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for (i = 0; i < priv->rx_bd_num; i++) {
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if (priv->rx_skb && priv->rx_skb[i]) {
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if (priv->rx_skb && priv->rx_skb[i]) {
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rxbd = &priv->rx_bd_vbase[i];
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rxbd = &priv->rx_bd_vbase[i];
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skb = priv->rx_skb[i];
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paddr = QTN_HOST_ADDR(le32_to_cpu(rxbd->addr_h),
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paddr = QTN_HOST_ADDR(le32_to_cpu(rxbd->addr_h),
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le32_to_cpu(rxbd->addr));
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le32_to_cpu(rxbd->addr));
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pci_unmap_single(priv->pdev, paddr, SKB_BUF_SIZE,
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pci_unmap_single(priv->pdev, paddr, SKB_BUF_SIZE,
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PCI_DMA_FROMDEVICE);
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PCI_DMA_FROMDEVICE);
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dev_kfree_skb_any(skb);
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dev_kfree_skb_any(priv->rx_skb[i]);
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priv->rx_skb[i] = NULL;
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}
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}
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}
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}
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/* free tx buffers */
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/* free tx buffers */
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for (i = 0; i < priv->tx_bd_num; i++) {
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for (i = 0; i < priv->tx_bd_num; i++) {
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if (priv->tx_skb && priv->tx_skb[i]) {
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if (priv->tx_skb && priv->tx_skb[i]) {
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dev_kfree_skb_any(priv->tx_skb[i]);
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txbd = &priv->tx_bd_vbase[i];
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skb = priv->tx_skb[i];
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paddr = QTN_HOST_ADDR(le32_to_cpu(txbd->addr_h),
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le32_to_cpu(txbd->addr));
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pci_unmap_single(priv->pdev, paddr, skb->len,
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PCI_DMA_TODEVICE);
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dev_kfree_skb_any(skb);
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priv->tx_skb[i] = NULL;
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priv->tx_skb[i] = NULL;
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}
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}
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}
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}
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@ -1321,12 +1329,6 @@ static int qtnf_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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goto err_base;
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goto err_base;
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}
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}
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ret = devm_add_action(&pdev->dev, free_xfer_buffers, (void *)pcie_priv);
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if (ret) {
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pr_err("custom release callback init failed\n");
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goto err_base;
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}
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ret = qtnf_pcie_init_xfer(pcie_priv);
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ret = qtnf_pcie_init_xfer(pcie_priv);
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if (ret) {
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if (ret) {
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pr_err("PCIE xfer init failed\n");
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pr_err("PCIE xfer init failed\n");
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@ -1343,7 +1345,7 @@ static int qtnf_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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"qtnf_pcie_irq", (void *)bus);
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"qtnf_pcie_irq", (void *)bus);
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if (ret) {
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if (ret) {
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pr_err("failed to request pcie irq %d\n", pdev->irq);
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pr_err("failed to request pcie irq %d\n", pdev->irq);
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goto err_base;
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goto err_xfer;
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}
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}
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tasklet_init(&pcie_priv->reclaim_tq, qtnf_reclaim_tasklet_fn,
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tasklet_init(&pcie_priv->reclaim_tq, qtnf_reclaim_tasklet_fn,
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@ -1387,6 +1389,9 @@ static int qtnf_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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err_bringup_fw:
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err_bringup_fw:
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netif_napi_del(&bus->mux_napi);
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netif_napi_del(&bus->mux_napi);
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err_xfer:
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qtnf_free_xfer_buffers(pcie_priv);
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err_base:
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err_base:
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flush_workqueue(pcie_priv->workqueue);
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flush_workqueue(pcie_priv->workqueue);
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destroy_workqueue(pcie_priv->workqueue);
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destroy_workqueue(pcie_priv->workqueue);
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@ -1416,6 +1421,7 @@ static void qtnf_pcie_remove(struct pci_dev *pdev)
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destroy_workqueue(priv->workqueue);
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destroy_workqueue(priv->workqueue);
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tasklet_kill(&priv->reclaim_tq);
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tasklet_kill(&priv->reclaim_tq);
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qtnf_free_xfer_buffers(priv);
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qtnf_debugfs_remove(bus);
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qtnf_debugfs_remove(bus);
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qtnf_pcie_free_shm_ipc(priv);
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qtnf_pcie_free_shm_ipc(priv);
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