On Thu, Jun 18, 2020 at 04:40:51PM +0100, Shiju Jose wrote:
> From: Yicong Yang <yangyicong@xxxxxxxxxxxxx>
>
> The HiSilicon HIP PCIe controller is capable of handling errors
> on root port and perform port reset separately at each root port.
>
> Add error handling driver for HIP PCIe controller to log
> and report recoverable errors. Perform root port reset and restore
> link status after the recovery.
>
> Following are some of the PCIe controller's recoverable errors
> 1. completion transmission timeout error.
> 2. CRS retry counter over the threshold error.
> 3. ECC 2 bit errors
> 4. AXI bresponse/rresponse errors etc.
>
> The driver placed in the drivers/pci/controller/ because the
> HIP PCIe controller does not use DWC ip.
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxx>
Hmm... Did I give a tag?
...
> +static guid_t hisi_pcie_sec_guid =
> + GUID_INIT(0xB2889FC9, 0xE7D7, 0x4F9D,
> + 0xA8, 0x67, 0xAF, 0x42, 0xE9, 0x8B, 0xE7, 0x72);
Drop one TAB in each line and add two spaces before 0xA8 on the last.
...
> + idx = HISI_PCIE_LOCAL_VALID_ERR_MISC;
> + for_each_set_bit_from(idx, (const unsigned long *)&edata->val_bits,
Can't you make val_bits unsigned long? Because this casting is incorrect.
Otherwise, make a local copy into unsigned long variable.
> + HISI_PCIE_LOCAL_VALID_ERR_MISC + HISI_PCIE_ERR_MISC_REGS)
> + dev_info(dev, "ERR_MISC_%d = 0x%x\n", idx - HISI_PCIE_LOCAL_VALID_ERR_MISC,
> + edata->err_misc[idx]);
...
> +static int hisi_pcie_error_handler_probe(struct platform_device *pdev)
> +{
> + struct hisi_pcie_error_private *priv;
> + int ret;
> +
> + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
(1)
> + if (!priv)
> + return -ENOMEM;
> +
> + priv->nb.notifier_call = hisi_pcie_notify_error;
> + priv->dev = &pdev->dev;
> + ret = ghes_register_event_notifier(&priv->nb);
> + if (ret) {
> + dev_err(&pdev->dev,
> + "Failed to register hisi_pcie_notify_error function\n");
> + return ret;
> + }
> +
> + platform_set_drvdata(pdev, priv);
> +
> + return 0;
> +}
> +
> +static int hisi_pcie_error_handler_remove(struct platform_device *pdev)
> +{
> + struct hisi_pcie_error_private *priv = platform_get_drvdata(pdev);
> +
> + ghes_unregister_event_notifier(&priv->nb);
> + kfree(priv);
See (1), as I told you, this is double free.
Have you tested this?
> + return 0;
> +}
--
With Best Regards,
Andy Shevchenko
