add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/rapidio/rio-scan.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * RapidIO enumeration and discovery support
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  *
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@@ -11,11 +12,6 @@
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  * Copyright 2009 Sysgo AG
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  * Thomas Moll <thomas.moll@sysgo.com>
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  * - Added Input- Output- enable functionality, to allow full communication
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- *
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- * This program is free software; you can redistribute  it and/or modify it
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- * under  the terms of  the GNU General  Public License as published by the
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- * Free Software Foundation;  either version 2 of the  License, or (at your
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- * option) any later version.
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  */
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 #include <linux/types.h>
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@@ -43,7 +39,7 @@
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 	u16 start;	/* logical minimal id */
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 	u32 max;	/* max number of IDs in table */
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 	spinlock_t lock;
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-	unsigned long table[0];
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+	unsigned long table[];
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 };
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 static int next_destid = 0;
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@@ -334,7 +330,7 @@
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 	size_t size;
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 	u32 swpinfo = 0;
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-	size = sizeof(struct rio_dev);
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+	size = sizeof(*rdev);
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 	if (rio_mport_read_config_32(port, destid, hopcount,
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 				     RIO_PEF_CAR, &result))
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 		return NULL;
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@@ -342,10 +338,8 @@
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 	if (result & (RIO_PEF_SWITCH | RIO_PEF_MULTIPORT)) {
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 		rio_mport_read_config_32(port, destid, hopcount,
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 					 RIO_SWP_INFO_CAR, &swpinfo);
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-		if (result & RIO_PEF_SWITCH) {
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-			size += (RIO_GET_TOTAL_PORTS(swpinfo) *
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-				sizeof(rswitch->nextdev[0])) + sizeof(*rswitch);
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-		}
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+		if (result & RIO_PEF_SWITCH)
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+			size += struct_size(rswitch, nextdev, RIO_GET_TOTAL_PORTS(swpinfo));
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 	}
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 	rdev = kzalloc(size, GFP_KERNEL);
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@@ -460,8 +454,12 @@
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 				   0, 0xffff);
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 	ret = rio_add_device(rdev);
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-	if (ret)
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-		goto cleanup;
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+	if (ret) {
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+		if (rswitch)
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+			kfree(rswitch->route_table);
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+		put_device(&rdev->dev);
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+		return NULL;
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+	}
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 	rio_dev_get(rdev);
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