From 23fa18eaa71266feff7ba8d83022d9e1cc83c65a Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:42:03 +0000
Subject: [PATCH] disable pwm7
---
kernel/arch/powerpc/lib/checksum_wrappers.c | 90 ++++++++-------------------------------------
1 files changed, 16 insertions(+), 74 deletions(-)
diff --git a/kernel/arch/powerpc/lib/checksum_wrappers.c b/kernel/arch/powerpc/lib/checksum_wrappers.c
index 8d83c39..b895166 100644
--- a/kernel/arch/powerpc/lib/checksum_wrappers.c
+++ b/kernel/arch/powerpc/lib/checksum_wrappers.c
@@ -1,17 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) IBM Corporation, 2010
*
@@ -24,83 +12,37 @@
#include <linux/uaccess.h>
__wsum csum_and_copy_from_user(const void __user *src, void *dst,
- int len, __wsum sum, int *err_ptr)
+ int len)
{
- unsigned int csum;
+ __wsum csum;
might_sleep();
+
+ if (unlikely(!access_ok(src, len)))
+ return 0;
+
allow_read_from_user(src, len);
- *err_ptr = 0;
+ csum = csum_partial_copy_generic((void __force *)src, dst, len);
- if (!len) {
- csum = 0;
- goto out;
- }
-
- if (unlikely((len < 0) || !access_ok(VERIFY_READ, src, len))) {
- *err_ptr = -EFAULT;
- csum = (__force unsigned int)sum;
- goto out;
- }
-
- csum = csum_partial_copy_generic((void __force *)src, dst,
- len, sum, err_ptr, NULL);
-
- if (unlikely(*err_ptr)) {
- int missing = __copy_from_user(dst, src, len);
-
- if (missing) {
- memset(dst + len - missing, 0, missing);
- *err_ptr = -EFAULT;
- } else {
- *err_ptr = 0;
- }
-
- csum = csum_partial(dst, len, sum);
- }
-
-out:
prevent_read_from_user(src, len);
- return (__force __wsum)csum;
+ return csum;
}
EXPORT_SYMBOL(csum_and_copy_from_user);
-__wsum csum_and_copy_to_user(const void *src, void __user *dst, int len,
- __wsum sum, int *err_ptr)
+__wsum csum_and_copy_to_user(const void *src, void __user *dst, int len)
{
- unsigned int csum;
+ __wsum csum;
might_sleep();
+ if (unlikely(!access_ok(dst, len)))
+ return 0;
+
allow_write_to_user(dst, len);
- *err_ptr = 0;
+ csum = csum_partial_copy_generic(src, (void __force *)dst, len);
- if (!len) {
- csum = 0;
- goto out;
- }
-
- if (unlikely((len < 0) || !access_ok(VERIFY_WRITE, dst, len))) {
- *err_ptr = -EFAULT;
- csum = -1; /* invalid checksum */
- goto out;
- }
-
- csum = csum_partial_copy_generic(src, (void __force *)dst,
- len, sum, NULL, err_ptr);
-
- if (unlikely(*err_ptr)) {
- csum = csum_partial(src, len, sum);
-
- if (copy_to_user(dst, src, len)) {
- *err_ptr = -EFAULT;
- csum = -1; /* invalid checksum */
- }
- }
-
-out:
prevent_write_to_user(dst, len);
- return (__force __wsum)csum;
+ return csum;
}
EXPORT_SYMBOL(csum_and_copy_to_user);
--
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