Interrupt on MV2302

["Weixing Cheng" <chengwx@ssrc.ac.cn>]

hello, There has something with my system when using interrupt.
The system is like this :
Mv2302 CPU board + Avme9321 12 bit I/O card.
I tried to use External Trigger of Avme9321 and wrote a simple pure vxWorks program:

#include <vxWorks.h>
#include <stdio.h>
#include <stdioLib.h>
#include <sockLib.h>
#include <inetLib.h>
#include <strLib.h>
#include <ioLib.h>
#include <intLib.h>
#include <iv.h>

#define Base_Addr 0xfbff0000
void init();
void test();
void isr();

void init()
{
unsigned char * pointer;

pointer=Base_Addr+0x83;
*pointer=0xe0;      /* set the interrupt vector register*/

pointer=Base_Addr+0x81;    
*pointer= 0x10;          /* Board Software reset*/

pointer=Base_Addr+0x81;
*pointer=0x0B;          /*board int enable*/

pointer=Base_Addr+0x85;
*pointer=0x10;            /* board control register*/

printf("init finished now\n");

}

void test()
{
unsigned char * pointer;
init();
if(intConnect(INUM_TO_IVEC(0xe0),isr,0)==OK) /* intVector is set to 0xe0*/
printf("connect OK\n");
else
printf("Error\n");

sysIntEnable(4);        /* int level set to 4*/

pointer=Base_Addr+0x81;
printf("the status reg is %x\n",*pointer);

return OK;
}

void isr()
{
 unsigned char * pointer;
 pointer=Base_Addr+0x81;
 *pointer=0x03;  /*int disable*/
 sysIntDisable(4);
 logMsg("The isr is running...\n");
 *pointer=0x0B;  /*int enable*/
 sysIntEnable(4);
 return OK;
}


make and ld it. run test() routine. and then I give a external trigger to Avme9321. the 
message is like this:

Interrupt: The isr is running             
Interrupt: The isr is running     
Interrupt: T      
                                         /* it seems the isr is runing, but only 
                                         last for several times and get a overflow message,
                                          and reboot the system*/

WorkQPanic: Kernel work queue overflow        /* what does this mean? */

then the system reboot automatically, I don't know what's wrong with it. the External Trigger is
only a 1Hz square wave. Can any of you give me some advice ? Thank you.

Cheng Weixing from SSRF