注册中断时出现Unable to handle kernel NULL pointer dereference at virtual...

bjgui

请各位前辈帮忙指点一下.
我在init函数中注册中断时出现如下错误：
Root#insmod kbd.ko
using kbd.ko



Unable to handle kernel NULL pointer dereference at virtual address 00000060

pgd = c39e0000

[00000060] *pgd=33d01031, *pte=00000000, *ppte=00000000

Internal error: Oops: 17 [#1]

Modules linked in: kbd

CPU: 0

PC is at buttons4x4_init+0xc0/0x1fc [kbd]

LR is at set_irq_type+0x8c/0xb0

pc : [<bf0030c0>]
lr : [<c0021350>]
Tainted: GF

sp : c3fabf60
ip : c3fabf3c
fp : c3fabf7c

r10: 00000001
r9 : c3faa000
r8 : c3faa000

r7 : 00000000
r6 : bf001470
r5 : 00000000
r4 : 0000003f

r3 : 00000000
r2 : 0000fffe
r1 : 00000000
r0 : 00000000

Flags: nZcv
IRQs on
FIQs on
Mode SVC_32
Segment user

Control: C000717F
Table: 339E0000
DAC: 00000015

Process insmod (pid: 750, stack limit = 0xc3faa194)


Stack: (0xc3fabf60 to 0xc3fac000)

bf60: 00000000 c02315c4 bf0012e0 c02315b4 c3fabfa4 c3fabf80 c0054b10 bf003010

bf80: 00000004 00000000 00000000 00000080 c00200e4 00000000 00000000 c3fabfa8

bfa0: c001ff60 c00549b8 00000000 00000000 00900080 40015000 00001f58 001cb028

bfc0: 00000004 00000000 00000000 be901d64 001cb018 001cb008 00000000 00000000

bfe0: be8ff8b4 be8ff8a8 000444e0 40199ac0 60000010 00900080 30002031 30002431

Backtrace:

[<bf003000>] (buttons4x4_init+0x0/0x1fc [kbd]) from [<c0054b10>] (sys_init_modu)

r6 = C02315B4
r5 = BF0012E0
r4 = C02315C4

[<c00549a8>] (sys_init_module+0x0/0x310) from [<c001ff60>] (ret_fast_syscall+0x)
Code: e2800013 eb407882 e5961000 e59f2118 (e5913060)


Segmentation fault

/mnt/key_button_all_ok$

注册内容如下：
开头定义:
static int irq_col_tab[] = { IRQ_EINT0, IRQ_EINT2, IRQ_EINT11, IRQ_EINT19};
#define COL_NUM ( (sizeof irq_col_tab) / sizeof (irq_col_tab[0]) )
static unsigned gpio_col_tab[] = {S3C2410_GPF0, S3C2410_GPF2,S3C2410_GPG3, S3C2410_GPG11};
static unsigned gpio_row_tab[] = {S3C2410_GPF4, S3C2410_GPF5, S3C2410_GPF6, S3C2410_GPF7 };
以下为init中内容:


int i,ret;

//int port_irq;

for (i = 0; i < COL_NUM; i++) {

int irq = irq_col_tab;

set_irq_type(irq,IRQT_LOW);

s3c2410_gpio_pullup(gpio_col_tab,1);


ret = request_irq(irq, buttons_irq, SA_INTERRUPT, DEVICE_NAME, NULL);




if (ret) {

unregister_chrdev(BUTTON_MAJOR, DEVICE_NAME);

printk(DEVICE_NAME " can't request irq %d\n", irq);

return ret;


}

}

set_irq_type(IRQ_EINT3,IRQT_BOTHEDGE);

s3c2410_gpio_cfgpin(S3C2410_GPG0, S3C2410_GPG0_INP);//G端口中G0管脚设为输入模式

s3c2410_gpio_pullup(S3C2410_GPG0,0);
//G端口中G0管脚设为上拉使能

s3c2410_gpio_pullup(S3C2410_GPF3,0);//F端口中F3管脚设为上拉使能

/* writel(readl(gpbase+0x60) & 0xfffffffc,gpbase+0x60);//G端口中G0管脚设为输入模式


writel(readl(gpbase+0x6 & 0xfffe,gpbase+0x6;//G端口中G0管脚设为上拉使能


writel(readl(gpbase+0x5 & 0xfff7,gpbase+0x5;//F端口中F3管脚设为上拉使能*/


ret = request_irq(IRQ_EINT3, buttons2_irq, SA_INTERRUPT, DEVICE_NAME, NULL);


if (ret) {

unregister_chrdev(BUTTON_MAJOR, DEVICE_NAME);

printk(DEVICE_NAME " can't request irq %d\n", IRQ_EINT3);

return ret;


}

printk("keybutton interrupt register!\n";

return 0;
}
请高手帮忙分析一下,这是什么原因啊!谢谢!

深蓝苹果

我也遇到这个问题，似乎是注册的中断号被占用了，可是我换了一个被保留的中断还是一样，也在苦恼中

gaocheng

1. ret = request_irq(irq, buttons_irq, SA_INTERRUPT, DEVICE_NAME, NULL);
   
2. 
   
3. --〉ret = request_irq(irq_col_tab[i], buttons_irq, SA_INTERRUPT, DEVICE_NAME, NULL);

复制代码

[ 本帖最后由 gaocheng 于 2007-9-13 02:27 编辑 ]

深蓝苹果

查了一下，有定义
static int irq_col_tab[] = { IRQ_EINT0, IRQ_EINT2, IRQ_EINT11, IRQ_EINT19};
不过选择哪一个中断号呢～

gaocheng  能不能详细说一下

gaocheng

要根据硬件定啊!不是可以任意选的