Re: [PATCH net-next v9 5/5] net: wangxun: add pcie error handler

[Breno Leitao <leitao@debian.org>]

On Wed, Jul 01, 2026 at 03:23:57PM +0800, Jiawen Wu wrote:
> +static pci_ers_result_t wx_io_slot_reset(struct pci_dev *pdev)
> +{
> +	struct wx *wx = pci_get_drvdata(pdev);
> +	pci_ers_result_t result;
> +
> +	if (pci_enable_device_mem(pdev)) {
> +		wx_err(wx, "Cannot re-enable PCI device after reset.\n");
> +		result = PCI_ERS_RESULT_DISCONNECT;
> +	} else {
> +		/* make all memory operations done before clearing the flag */
> +		smp_mb__before_atomic();
> +		clear_bit(WX_STATE_DISABLED, wx->state);
> +		clear_bit(WX_FLAG_NEED_PCIE_RECOVERY, wx->flags);
> +		pci_set_master(pdev);
> +		pci_restore_state(pdev);
> +		pci_wake_from_d3(pdev, false);
> +
> +		rtnl_lock();
> +		if (netif_running(wx->netdev) && wx->down_suspend)
> +			wx->down_suspend(wx);
> +		if (wx->do_reset)
> +			wx->do_reset(wx->netdev, false);
> +		rtnl_unlock();
> +		result = PCI_ERS_RESULT_RECOVERED;
> +	}
> +
> +	pci_aer_clear_nonfatal_status(pdev);

After bfcb79fca19d ("PCI/ERR: Run error recovery callbacks for all
affected devices"), AER errors are always cleared by the PCI core and
drivers don't need to do it themselves.