enable docker ppp

hc

2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/drivers/pps/clients/pps_parport.c
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@@ -1,22 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * pps_parport.c -- kernel parallel port PPS client
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  *
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- *
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  * Copyright (C) 2009   Alexander Gordeev <lasaine@lvk.cs.msu.su>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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  */
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@@ -179,7 +165,7 @@
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165
 
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 	device->pps = pps_register_source(&info,
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 			PPS_CAPTUREBOTH | PPS_OFFSETASSERT | PPS_OFFSETCLEAR);
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-	if (device->pps == NULL) {
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+	if (IS_ERR(device->pps)) {
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 		pr_err("couldn't register PPS source\n");
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 		goto err_release_dev;
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 	}