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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/powerpc/kernel/rtasd.c
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@@ -1,10 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Copyright (C) 2001 Anton Blanchard <anton@au.ibm.com>, IBM
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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  *
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  * Communication to userspace based on kernel/printk.c
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  */
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@@ -91,6 +87,8 @@
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 			return "Dump Notification Event";
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 		case RTAS_TYPE_PRRN:
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 			return "Platform Resource Reassignment Event";
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+		case RTAS_TYPE_HOTPLUG:
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+			return "Hotplug Event";
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 	}
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 	return rtas_type[0];
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@@ -150,8 +148,10 @@
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 	} else {
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 		struct rtas_error_log *errlog = (struct rtas_error_log *)buf;
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-		printk(RTAS_DEBUG "event: %d, Type: %s, Severity: %d\n",
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-		       error_log_cnt, rtas_event_type(rtas_error_type(errlog)),
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+		printk(RTAS_DEBUG "event: %d, Type: %s (%d), Severity: %d\n",
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+		       error_log_cnt,
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+		       rtas_event_type(rtas_error_type(errlog)),
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+		       rtas_error_type(errlog),
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 		       rtas_error_severity(errlog));
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 	}
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 }
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@@ -273,36 +273,14 @@
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 	}
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 }
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-#ifdef CONFIG_PPC_PSERIES
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-static void handle_prrn_event(s32 scope)
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-{
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-	/*
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-	 * For PRRN, we must pass the negative of the scope value in
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-	 * the RTAS event.
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-	 */
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-	pseries_devicetree_update(-scope);
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-	numa_update_cpu_topology(false);
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-}
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-
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 static void handle_rtas_event(const struct rtas_error_log *log)
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 {
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-	if (rtas_error_type(log) != RTAS_TYPE_PRRN || !prrn_is_enabled())
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+	if (!machine_is(pseries))
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 		return;
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-	/* For PRRN Events the extended log length is used to denote
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-	 * the scope for calling rtas update-nodes.
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-	 */
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-	handle_prrn_event(rtas_error_extended_log_length(log));
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+	if (rtas_error_type(log) == RTAS_TYPE_PRRN)
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+		pr_info_ratelimited("Platform resource reassignment ignored.\n");
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 }
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-
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-#else
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-
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-static void handle_rtas_event(const struct rtas_error_log *log)
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-{
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-	return;
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-}
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-
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-#endif
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 static int rtas_log_open(struct inode * inode, struct file * file)
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 {
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@@ -331,7 +309,7 @@
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 	count = rtas_error_log_buffer_max;
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-	if (!access_ok(VERIFY_WRITE, buf, count))
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+	if (!access_ok(buf, count))
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 		return -EFAULT;
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 	tmp = kmalloc(count, GFP_KERNEL);
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@@ -385,12 +363,12 @@
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 	return 0;
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 }
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-static const struct file_operations proc_rtas_log_operations = {
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-	.read =		rtas_log_read,
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-	.poll =		rtas_log_poll,
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-	.open =		rtas_log_open,
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-	.release =	rtas_log_release,
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-	.llseek =	noop_llseek,
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+static const struct proc_ops rtas_log_proc_ops = {
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+	.proc_read	= rtas_log_read,
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+	.proc_poll	= rtas_log_poll,
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+	.proc_open	= rtas_log_open,
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+	.proc_release	= rtas_log_release,
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+	.proc_lseek	= noop_llseek,
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 };
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 static int enable_surveillance(int timeout)
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@@ -572,7 +550,7 @@
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 		return -ENODEV;
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 	entry = proc_create("powerpc/rtas/error_log", 0400, NULL,
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-			    &proc_rtas_log_operations);
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+			    &rtas_log_proc_ops);
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 	if (!entry)
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 		printk(KERN_ERR "Failed to create error_log proc entry\n");
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