enable docker ppp

hc

2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/drivers/usb/misc/uss720.c
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@@ -71,6 +71,7 @@
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 	dev_dbg(&priv->usbdev->dev, "destroying priv datastructure\n");
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 	usb_put_dev(priv->usbdev);
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+	priv->usbdev = NULL;
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 	kfree(priv);
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 }
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..
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@@ -736,7 +737,6 @@
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 	parport_announce_port(pp);
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 	usb_set_intfdata(intf, pp);
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-	usb_put_dev(usbdev);
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 	return 0;
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 probe_abort:
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@@ -754,7 +754,6 @@
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 	usb_set_intfdata(intf, NULL);
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 	if (pp) {
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 		priv = pp->private_data;
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-		priv->usbdev = NULL;
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 		priv->pp = NULL;
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 		dev_dbg(&intf->dev, "parport_remove_port\n");
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 		parport_remove_port(pp);