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/fs/efivarfs/file.c | 38 +++++++++++++++++++++-----------------
1 files changed, 21 insertions(+), 17 deletions(-)
diff --git a/kernel/fs/efivarfs/file.c b/kernel/fs/efivarfs/file.c
index 8e56842..feaa5e1 100644
--- a/kernel/fs/efivarfs/file.c
+++ b/kernel/fs/efivarfs/file.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2012 Red Hat, Inc.
* Copyright (C) 2012 Jeremy Kerr <jeremy.kerr@canonical.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/efi.h>
@@ -54,6 +51,7 @@
} else {
inode_lock(inode);
i_size_write(inode, datasize + sizeof(attributes));
+ inode->i_mtime = current_time(inode);
inode_unlock(inode);
}
@@ -75,10 +73,8 @@
ssize_t size = 0;
int err;
- while (!__ratelimit(&file->f_cred->user->ratelimit)) {
- if (!msleep_interruptible(50))
- return -EINTR;
- }
+ while (!__ratelimit(&file->f_cred->user->ratelimit))
+ msleep(50);
err = efivar_entry_size(var, &datasize);
@@ -110,16 +106,22 @@
return size;
}
-static int
-efivarfs_ioc_getxflags(struct file *file, void __user *arg)
+static inline unsigned int efivarfs_getflags(struct inode *inode)
{
- struct inode *inode = file->f_mapping->host;
unsigned int i_flags;
unsigned int flags = 0;
i_flags = inode->i_flags;
if (i_flags & S_IMMUTABLE)
flags |= FS_IMMUTABLE_FL;
+ return flags;
+}
+
+static int
+efivarfs_ioc_getxflags(struct file *file, void __user *arg)
+{
+ struct inode *inode = file->f_mapping->host;
+ unsigned int flags = efivarfs_getflags(inode);
if (copy_to_user(arg, &flags, sizeof(flags)))
return -EFAULT;
@@ -132,6 +134,7 @@
struct inode *inode = file->f_mapping->host;
unsigned int flags;
unsigned int i_flags = 0;
+ unsigned int oldflags = efivarfs_getflags(inode);
int error;
if (!inode_owner_or_capable(inode))
@@ -143,9 +146,6 @@
if (flags & ~FS_IMMUTABLE_FL)
return -EOPNOTSUPP;
- if (!capable(CAP_LINUX_IMMUTABLE))
- return -EPERM;
-
if (flags & FS_IMMUTABLE_FL)
i_flags |= S_IMMUTABLE;
@@ -155,12 +155,16 @@
return error;
inode_lock(inode);
+
+ error = vfs_ioc_setflags_prepare(inode, oldflags, flags);
+ if (error)
+ goto out;
+
inode_set_flags(inode, i_flags, S_IMMUTABLE);
+out:
inode_unlock(inode);
-
mnt_drop_write_file(file);
-
- return 0;
+ return error;
}
static long
--
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