From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM
---
kernel/drivers/hid/hidraw.c | 44 +++++++++++++++++++++++---------------------
1 files changed, 23 insertions(+), 21 deletions(-)
diff --git a/kernel/drivers/hid/hidraw.c b/kernel/drivers/hid/hidraw.c
index c4ba2d2..fade7fc 100644
--- a/kernel/drivers/hid/hidraw.c
+++ b/kernel/drivers/hid/hidraw.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* HID raw devices, giving access to raw HID events.
*
@@ -9,15 +10,6 @@
* Copyright (c) 2007-2014 Jiri Kosina
*/
-/*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * 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.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -107,8 +99,6 @@
/*
* The first byte of the report buffer is expected to be a report number.
- *
- * This function is to be called with the minors_lock mutex held.
*/
static ssize_t hidraw_send_report(struct file *file, const char __user *buffer, size_t count, unsigned char report_type)
{
@@ -116,6 +106,8 @@
struct hid_device *dev;
__u8 *buf;
int ret = 0;
+
+ lockdep_assert_held(&minors_lock);
if (!hidraw_table[minor] || !hidraw_table[minor]->exist) {
ret = -ENODEV;
@@ -181,8 +173,6 @@
* of buffer is the report number to request, or 0x0 if the defice does not
* use numbered reports. The report_type parameter can be HID_FEATURE_REPORT
* or HID_INPUT_REPORT.
- *
- * This function is to be called with the minors_lock mutex held.
*/
static ssize_t hidraw_get_report(struct file *file, char __user *buffer, size_t count, unsigned char report_type)
{
@@ -191,6 +181,8 @@
__u8 *buf;
int ret = 0, len;
unsigned char report_number;
+
+ lockdep_assert_held(&minors_lock);
if (!hidraw_table[minor] || !hidraw_table[minor]->exist) {
ret = -ENODEV;
@@ -205,15 +197,15 @@
}
if (count > HID_MAX_BUFFER_SIZE) {
- printk(KERN_WARNING "hidraw: pid %d passed too large report\n",
- task_pid_nr(current));
+ hid_warn(dev, "pid %d passed too large report\n",
+ task_pid_nr(current));
ret = -EINVAL;
goto out;
}
if (count < 2) {
- printk(KERN_WARNING "hidraw: pid %d passed too short report\n",
- task_pid_nr(current));
+ hid_warn(dev, "pid %d passed too short report\n",
+ task_pid_nr(current));
ret = -EINVAL;
goto out;
}
@@ -354,10 +346,13 @@
unsigned int minor = iminor(inode);
struct hidraw_list *list = file->private_data;
unsigned long flags;
+ int i;
mutex_lock(&minors_lock);
spin_lock_irqsave(&hidraw_table[minor]->list_lock, flags);
+ for (i = list->tail; i < list->head; i++)
+ kfree(list->buffer[i].value);
list_del(&list->node);
spin_unlock_irqrestore(&hidraw_table[minor]->list_lock, flags);
kfree(list);
@@ -459,6 +454,15 @@
-EFAULT : len;
break;
}
+
+ if (_IOC_NR(cmd) == _IOC_NR(HIDIOCGRAWUNIQ(0))) {
+ int len = strlen(hid->uniq) + 1;
+ if (len > _IOC_SIZE(cmd))
+ len = _IOC_SIZE(cmd);
+ ret = copy_to_user(user_arg, hid->uniq, len) ?
+ -EFAULT : len;
+ break;
+ }
}
ret = -ENOTTY;
@@ -477,9 +481,7 @@
.release = hidraw_release,
.unlocked_ioctl = hidraw_ioctl,
.fasync = hidraw_fasync,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = hidraw_ioctl,
-#endif
+ .compat_ioctl = compat_ptr_ioctl,
.llseek = noop_llseek,
};
@@ -606,7 +608,7 @@
if (result < 0)
goto error_class;
- printk(KERN_INFO "hidraw: raw HID events driver (C) Jiri Kosina\n");
+ pr_info("raw HID events driver (C) Jiri Kosina\n");
out:
return result;
--
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