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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
Altera TSE: Fix Panic in probe routine when phy probe fails
This patch addresses a fault in the error recovery path of the probe routine where the netdev structure was not being unregistered properly leading to a panic only when the phy probe failed. Abbreviated panic stack seen is as follows: (free_netdev+0xXX) from (altera_tse_probe+0xXX) (altera_tse_probe+0xXX) from (platform_drv_probe+0xXX) (platform_drv_probe+0xXX) from (driver_probe_device+0xXX) (driver_probe_device+0xXX) from (__driver_attach+0xXX) (__driver_attach+0xXX) from (bus_for_each_dev+0xXX) (bus_for_each_dev+0xXX) from (driver_attach+0xXX) (driver_attach+0xXX) from (bus_add_driver+0xXX) (bus_add_driver+0xXX) from (driver_register+0xXX) (driver_register+0xXX) from (__platform_driver_register+0xXX) (__platform_driver_register+0xXX) from (altera_tse_driver_init+0xXX) (altera_tse_driver_init+0xXX) from (do_one_initcall+0xXX) (do_one_initcall+0xXX) from (kernel_init_freeable+0xXX) (kernel_init_freeable+0xXX) from (kernel_init+0xXX) (kernel_init+0xXX) from (ret_from_fork+0xXX) Signed-off-by: Vince Bridgers <vbridgers2013@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
5aec4ee372
commit
a76420092d
1 changed files with 24 additions and 21 deletions
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@ -1245,7 +1245,7 @@ static int altera_tse_probe(struct platform_device *pdev)
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/* Get the mapped address to the SGDMA descriptor memory */
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ret = request_and_map(pdev, "s1", &dma_res, &descmap);
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if (ret)
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goto out_free;
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goto err_free_netdev;
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/* Start of that memory is for transmit descriptors */
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priv->tx_dma_desc = descmap;
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@ -1264,24 +1264,24 @@ static int altera_tse_probe(struct platform_device *pdev)
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if (upper_32_bits(priv->rxdescmem_busaddr)) {
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dev_dbg(priv->device,
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"SGDMA bus addresses greater than 32-bits\n");
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goto out_free;
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goto err_free_netdev;
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}
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if (upper_32_bits(priv->txdescmem_busaddr)) {
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dev_dbg(priv->device,
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"SGDMA bus addresses greater than 32-bits\n");
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goto out_free;
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goto err_free_netdev;
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}
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} else if (priv->dmaops &&
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priv->dmaops->altera_dtype == ALTERA_DTYPE_MSGDMA) {
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ret = request_and_map(pdev, "rx_resp", &dma_res,
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&priv->rx_dma_resp);
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if (ret)
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goto out_free;
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goto err_free_netdev;
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ret = request_and_map(pdev, "tx_desc", &dma_res,
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&priv->tx_dma_desc);
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if (ret)
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goto out_free;
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goto err_free_netdev;
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priv->txdescmem = resource_size(dma_res);
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priv->txdescmem_busaddr = dma_res->start;
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@ -1289,13 +1289,13 @@ static int altera_tse_probe(struct platform_device *pdev)
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ret = request_and_map(pdev, "rx_desc", &dma_res,
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&priv->rx_dma_desc);
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if (ret)
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goto out_free;
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goto err_free_netdev;
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priv->rxdescmem = resource_size(dma_res);
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priv->rxdescmem_busaddr = dma_res->start;
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} else {
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goto out_free;
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goto err_free_netdev;
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}
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if (!dma_set_mask(priv->device, DMA_BIT_MASK(priv->dmaops->dmamask)))
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@ -1304,26 +1304,26 @@ static int altera_tse_probe(struct platform_device *pdev)
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else if (!dma_set_mask(priv->device, DMA_BIT_MASK(32)))
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dma_set_coherent_mask(priv->device, DMA_BIT_MASK(32));
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else
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goto out_free;
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goto err_free_netdev;
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/* MAC address space */
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ret = request_and_map(pdev, "control_port", &control_port,
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(void __iomem **)&priv->mac_dev);
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if (ret)
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goto out_free;
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goto err_free_netdev;
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/* xSGDMA Rx Dispatcher address space */
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ret = request_and_map(pdev, "rx_csr", &dma_res,
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&priv->rx_dma_csr);
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if (ret)
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goto out_free;
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goto err_free_netdev;
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/* xSGDMA Tx Dispatcher address space */
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ret = request_and_map(pdev, "tx_csr", &dma_res,
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&priv->tx_dma_csr);
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if (ret)
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goto out_free;
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goto err_free_netdev;
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/* Rx IRQ */
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@ -1331,7 +1331,7 @@ static int altera_tse_probe(struct platform_device *pdev)
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if (priv->rx_irq == -ENXIO) {
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dev_err(&pdev->dev, "cannot obtain Rx IRQ\n");
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ret = -ENXIO;
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goto out_free;
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goto err_free_netdev;
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}
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/* Tx IRQ */
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@ -1339,7 +1339,7 @@ static int altera_tse_probe(struct platform_device *pdev)
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if (priv->tx_irq == -ENXIO) {
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dev_err(&pdev->dev, "cannot obtain Tx IRQ\n");
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ret = -ENXIO;
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goto out_free;
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goto err_free_netdev;
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}
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/* get FIFO depths from device tree */
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@ -1347,14 +1347,14 @@ static int altera_tse_probe(struct platform_device *pdev)
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&priv->rx_fifo_depth)) {
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dev_err(&pdev->dev, "cannot obtain rx-fifo-depth\n");
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ret = -ENXIO;
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goto out_free;
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goto err_free_netdev;
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}
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if (of_property_read_u32(pdev->dev.of_node, "tx-fifo-depth",
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&priv->rx_fifo_depth)) {
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dev_err(&pdev->dev, "cannot obtain tx-fifo-depth\n");
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ret = -ENXIO;
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goto out_free;
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goto err_free_netdev;
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}
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/* get hash filter settings for this instance */
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@ -1403,7 +1403,7 @@ static int altera_tse_probe(struct platform_device *pdev)
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((priv->phy_addr >= 0) && (priv->phy_addr < PHY_MAX_ADDR)))) {
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dev_err(&pdev->dev, "invalid phy-addr specified %d\n",
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priv->phy_addr);
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goto out_free;
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goto err_free_netdev;
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}
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/* Create/attach to MDIO bus */
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@ -1411,7 +1411,7 @@ static int altera_tse_probe(struct platform_device *pdev)
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atomic_add_return(1, &instance_count));
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if (ret)
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goto out_free;
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goto err_free_netdev;
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/* initialize netdev */
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ether_setup(ndev);
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@ -1448,7 +1448,7 @@ static int altera_tse_probe(struct platform_device *pdev)
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ret = register_netdev(ndev);
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if (ret) {
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dev_err(&pdev->dev, "failed to register TSE net device\n");
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goto out_free_mdio;
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goto err_register_netdev;
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}
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platform_set_drvdata(pdev, ndev);
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@ -1465,13 +1465,16 @@ static int altera_tse_probe(struct platform_device *pdev)
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ret = init_phy(ndev);
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if (ret != 0) {
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netdev_err(ndev, "Cannot attach to PHY (error: %d)\n", ret);
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goto out_free_mdio;
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goto err_init_phy;
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}
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return 0;
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out_free_mdio:
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err_init_phy:
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unregister_netdev(ndev);
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err_register_netdev:
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netif_napi_del(&priv->napi);
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altera_tse_mdio_destroy(ndev);
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out_free:
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err_free_netdev:
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free_netdev(ndev);
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return ret;
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}
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