修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/include/linux/debugfs.h
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@@ -45,7 +45,7 @@
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 extern struct dentry *arch_debugfs_dir;
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-#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt)		\
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+#define DEFINE_DEBUGFS_ATTRIBUTE_XSIGNED(__fops, __get, __set, __fmt, __is_signed)	\
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 static int __fops ## _open(struct inode *inode, struct file *file)	\
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 {									\
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 	__simple_attr_check_format(__fmt, 0ull);			\
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@@ -56,9 +56,15 @@
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 	.open	 = __fops ## _open,					\
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 	.release = simple_attr_release,					\
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 	.read	 = debugfs_attr_read,					\
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-	.write	 = debugfs_attr_write,					\
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+	.write	 = (__is_signed) ? debugfs_attr_write_signed : debugfs_attr_write,	\
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 	.llseek  = no_llseek,						\
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 }
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+
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+#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt)		\
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+	DEFINE_DEBUGFS_ATTRIBUTE_XSIGNED(__fops, __get, __set, __fmt, false)
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+
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+#define DEFINE_DEBUGFS_ATTRIBUTE_SIGNED(__fops, __get, __set, __fmt)	\
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+	DEFINE_DEBUGFS_ATTRIBUTE_XSIGNED(__fops, __get, __set, __fmt, true)
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 typedef struct vfsmount *(*debugfs_automount_t)(struct dentry *, void *);
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@@ -101,6 +107,8 @@
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 ssize_t debugfs_attr_read(struct file *file, char __user *buf,
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 			size_t len, loff_t *ppos);
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 ssize_t debugfs_attr_write(struct file *file, const char __user *buf,
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+			size_t len, loff_t *ppos);
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+ssize_t debugfs_attr_write_signed(struct file *file, const char __user *buf,
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 			size_t len, loff_t *ppos);
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 struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
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@@ -249,6 +257,13 @@
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 	return -ENODEV;
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 }
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+static inline ssize_t debugfs_attr_write_signed(struct file *file,
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+					const char __user *buf,
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+					size_t len, loff_t *ppos)
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+{
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+	return -ENODEV;
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+}
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+
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 static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
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                 struct dentry *new_dir, char *new_name)
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 {