"Flags mismatch irq" register interrupt handler error
Question :
When you see the log "Flags mismatch irq ............", maybe you use the same irq number to register different interrupt handler .
irq number ---> handler_1
|
|--> handler_2
|
|--> handler_3
|
|--> handler_4
log
01-01 00:00:17.887 I/SMBCHG ( 0): ovp_handler_init: chip->cd_ac_acok_n_gpio_irq = 101
01-01 00:00:17.893 E/genirq ( 0): Flags mismatch irq 101. 00002003 (cd_ac_acok_n) vs. 00002003 (cd_acok_n_irq_1)
01-01 00:00:17.902 I/SMBCHG ( 0): ovp_handler_init: request irq cd_ac_acok_nerror.
void xxx_init(void)
{
...
...
chip->cd_ac_acok_n_gpio_irq = gpio_to_irq(chip->cd_ac_acok_n_gpio_number);
pr_err("chip->cd_ac_acok_n_gpio_irq = %d\n", chip->cd_ac_acok_n_gpio_irq);
rc = request_irq(chip->cd_ac_acok_n_gpio_irq,
cd_ac_acok_n_gpio_isr,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
"cd_acok_n_irq_1",
chip);
...
...
}
void yyy_init(void)
{
...
...
rc = request_irq(chip->cd_ac_acok_n_gpio_irq
handler_name,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
"cd_ac_acok_n",
chip);
...
...
}
...
...
/*
* Can't share interrupts unless both agree to and are
* the same type (level, edge, polarity). So both flag
* fields must have IRQF_SHARED set and the bits which
* set the trigger type must match. Also all must
* agree on ONESHOT.
*/
if (!((old->flags & new->flags) & IRQF_SHARED) ||
((old->flags ^ new->flags) & IRQF_TRIGGER_MASK) ||
((old->flags ^ new->flags) & IRQF_ONESHOT))
goto mismatch;
...
...
mismatch:
if (!(new->flags & IRQF_PROBE_SHARED)) {
pr_err("Flags mismatch irq %d. %08x (%s) vs. %08x (%s)\n",
irq, new->flags, new->name, old->flags, old->name);
#ifdef CONFIG_DEBUG_SHIRQ
dump_stack();
#endif
}
...
...
android/kernel/msm-3.18/kernel/irq/manage.c
Solve :
If you want to use the same irq number to register different interrupt handler, please use IRQ_SHARED flags.
void xxx_init(void)
{
...
...
chip->cd_ac_acok_n_gpio_irq = gpio_to_irq(chip->cd_ac_acok_n_gpio_number);
pr_err("chip->cd_ac_acok_n_gpio_irq = %d\n", chip->cd_ac_acok_n_gpio_irq);
rc = request_irq(chip->cd_ac_acok_n_gpio_irq, cd_ac_acok_n_gpio_isr,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED ,
"cd_acok_n_irq_1",
chip);
...
...
}
void yyy_init(void)
{
...
...
rc = request_irq(chip->cd_ac_acok_n_gpio_irq
handler_name,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED,
"cd_ac_acok_n",
chip);
...
...
}
Extension 1 :
If you register isr successful, the system has related information in /proc/interrupts
adb root
adb shell
cat /proc/interrupts
The first column is irq number.
The second ~ fifth column is the number of some cpu that execute isr.
The sixth ~ 7th is the source of hardware.
The 8th is isr or handler name.
The below code respond to the last row of the above picture
irq_number = gpio_to_irq(48);
rc = request_irq(irq_number, // 55
isr_1,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQ_SHARED,
"cd_acok_n_irq",
chip);
rc = request_irq(irq_number, // 55
isr_2,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQ_SHARED,
"cd_acok_n",
chip);
Reference :
http://blog.51cto.com/noican/1355357
"Flags mismatch irq" register interrupt handler error的更多相关文章
- mysql-5.6.20主从同步错误之Error_code: 1032; handler error HA_ERR_KEY_NOT_FOUND
mysql-5.6.20主从同步错误之Error_code: 1032; handler error HA_ERR_KEY_NOT_FOUND 方法一: 1.Error_code: 1032; ha ...
- Sharc FLAGS I/O Register(flag0~3)
Core FLAG Pins Multiplexing This module also includes the multiplexers of the FLAG0-3 pins shown ...
- Interrupt handler
1.处理器上的中断硬件关系图 2. 中断处理例程 3. 顶半部与底半部
- Linux kernel的中断子系统之(五):驱动申请中断API
返回目录:<ARM-Linux中断系统>. 总结:二重点区分了抢占式内核和非抢占式内核的区别:抢占式内核可以在内核空间进行抢占,通过对中断处理进行线程化可以提高Linux内核实时性. 三介 ...
- Linux中断 - 驱动申请中断API
一.前言 本文主要的议题是作为一个普通的驱动工程师,在撰写自己负责的驱动的时候,如何向Linux Kernel中的中断子系统注册中断处理函数?为了理解注册中断的接口,必须了解一些中断线程化(threa ...
- Linux kernel中断子系统之(五):驱动申请中断API【转】
转自:http://www.wowotech.net/linux_kenrel/request_threaded_irq.html 一.前言 本文主要的议题是作为一个普通的驱动工程师,在撰写自己负责的 ...
- Linux内核实现透视---硬中断
Linux的中断处理是驱动中比较重要的一部分内容,要清楚具体的实现才能更好的理解而不是靠记住别人理解后总结的规律,所以今天就打算从从源码来学习一下Linux内核对于中断处理过程,设计中断子系统的初始化 ...
- 曾经的足迹——对Linux CAN驱动的理解(1)
在Ti的AM335X系列Cortext-A8芯片中,CAN模块采用D_CAN结构,实质即两路CAN接口. 在此分享一下对基于AM335X的Linux CAN驱动源码的理解.下面来分析它的驱动源码及其工 ...
- 中断API之setup_irq【转】
转自:https://blog.csdn.net/tiantao2012/article/details/78957472 版权声明:本文为博主原创文章,未经博主允许不得转载. https://blo ...
随机推荐
- Python Collections详解
Python Collections详解 collections模块在内置数据结构(list.tuple.dict.set)的基础上,提供了几个额外的数据结构:ChainMap.Counter.deq ...
- Openstack keystone组件详解
OpenStack Keystone Keystone(OpenStack Identity Service)是 OpenStack 框架中负责管理身份验证.服务规则和服务令牌功能的模块.用户访问资源 ...
- Events-事件-红绿灯
Event: 用于线程之间状态的同步.对全局变量不断地做修改. Event=threading.Event() #生成1个event的对象 Event.wait() #等着设定全局变量.检测标志位是 ...
- CentOS 文件特殊权限SUID,SGID,SBIT
1.SUID ,是一种对二进制程序进行设置的特殊权限,可以让二进制程序的执行者临时拥有所有者的权限(仅对拥有执行权限的二进制程序有效). (1)SUID权限仅对二进制程序有效: (2)本权限仅在执行该 ...
- BZOJ3223:文艺平衡树——超详细题解
http://www.lydsy.com/JudgeOnline/problem.php?id=3223 题面复制于洛谷. 题目背景 这是一道经典的Splay模板题——文艺平衡树. 题目描述 您需要写 ...
- HDOJ.2037 今年暑假不AC (贪心)
今年暑假不AC 点我挑战此题 题意分析 给出来n组节目的起止时间,让求出所最多能观看的完整节目个数. 贪心策略:按照节目的结束时间升序排序,比较下一项的开始时间是否比上一项的结束时间大,是的话计数器+ ...
- IT英语累积
JPA: Java Persistence API 一种持久化规范 Spring Data:一种用于简化数据库访问,支持云服务的开源框架 Spring Data JPA:是Spring Data的 ...
- mysql语句及执行计划
数据库链接: mysql -uroot -p <!--数据库连接-->mysql -h10.0.0.100 -uuser -passwordshow databases <!--查看 ...
- 使用C#解析并运行JavaScript代码
如果想在C#编程中解析并运行JavaScript代码,常见的方式有两种: 利用COM组件“Microsoft Script Control”,可参见:C#使用技巧之调用JS脚本方法一 利用JScrip ...
- pushViewController:animated:的问题
1.在AppDelegate.m中: 2.在SecondViewController.h中: 3.在FirstViewController.m中: 4.在SecondViewController.m中 ...