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---
net: wangxun: move reusable PCI driver ops functions into libwx

This commit refactors PCI driver ops functions (suspend, resume, shutdown)
from ngbe_main.c into the shared libwx library, adding function pointers
wx->close_suspend() and adjusting wx->do_reset() to support this.

[ ... ]

+int wx_resume(struct pci_dev *pdev)
+{
+	struct net_device *netdev;
+	struct wx *wx;
+	u32 err;
+
+	wx = pci_get_drvdata(pdev);
+	netdev = wx->netdev;
+
+	err = pci_enable_device_mem(pdev);
+	if (err) {
+		wx_err(wx, "Cannot enable PCI device from suspend\n");
+		return err;
+	}
+	pci_set_master(pdev);
+	device_wakeup_disable(&pdev->dev);
+
+	wx->do_reset(netdev, false);
+	rtnl_lock();
+
+	err = wx_init_interrupt_scheme(wx);
+	if (!err && netif_running(netdev))
+		err = netdev->netdev_ops->ndo_open(netdev);
+	if (!err)
+		netif_device_attach(netdev);
+	rtnl_unlock();
+
+	return 0;
+}

Does wx_resume() need to return the error value stored in err?

The function assigns errors from wx_init_interrupt_scheme() and ndo_open()
to the err variable, and correctly skips netif_device_attach() when errors
occur, but then unconditionally returns 0 instead of returning err.

The early error handling for pci_enable_device_mem() correctly returns err,
but errors from the later calls are lost. This would tell the PM core that
resume succeeded when it actually failed.
-- 
pw-bot: cr