add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/mailbox/pcc.c
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@@ -1,16 +1,7 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *	Copyright (C) 2014 Linaro Ltd.
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  *	Author:	Ashwin Chaugule <ashwin.chaugule@linaro.org>
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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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  *  PCC (Platform Communication Channel) is defined in the ACPI 5.0+
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  *  specification. It is a mailbox like mechanism to allow clients
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@@ -382,7 +373,7 @@
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  *
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  * This gets called for each entry in the PCC table.
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  */
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-static int parse_pcc_subspace(struct acpi_subtable_header *header,
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+static int parse_pcc_subspace(union acpi_subtable_headers *header,
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 		const unsigned long end)
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 {
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 	struct acpi_pcct_subspace *ss = (struct acpi_pcct_subspace *) header;
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@@ -466,14 +457,17 @@
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 			pr_warn("Error parsing PCC subspaces from PCCT\n");
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 		else
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 			pr_warn("Invalid PCCT: %d PCC subspaces\n", count);
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-		return -EINVAL;
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+
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+		rc = -EINVAL;
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+		goto err_put_pcct;
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 	}
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 	pcc_mbox_channels = kcalloc(count, sizeof(struct mbox_chan),
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 				    GFP_KERNEL);
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 	if (!pcc_mbox_channels) {
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 		pr_err("Could not allocate space for PCC mbox channels\n");
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-		return -ENOMEM;
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+		rc = -ENOMEM;
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+		goto err_put_pcct;
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 	}
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 	pcc_doorbell_vaddr = kcalloc(count, sizeof(void *), GFP_KERNEL);
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@@ -544,6 +538,8 @@
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 	kfree(pcc_doorbell_vaddr);
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 err_free_mbox:
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 	kfree(pcc_mbox_channels);
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+err_put_pcct:
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+	acpi_put_table(pcct_tbl);
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 	return rc;
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 }
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@@ -577,7 +573,7 @@
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 	return ret;
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 }
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-struct platform_driver pcc_mbox_driver = {
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+static struct platform_driver pcc_mbox_driver = {
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 	.probe = pcc_mbox_probe,
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 	.driver = {
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 		.name = "PCCT",