BUG: scheduling while atomic:

[smitha.vanga at wipro.com]

Hi Scoot,

 When my  ISR gets exeuted I get a below BUG. Could let me what I am doing wrong in the ISR?


 BUG: scheduling while atomic: IRQ-20/0x0fff0000/108
Call Trace:
[C3AEFEC0] [C0007CCC]  (unreliable)
[C3AEFEF0] [C0017F10]
[C3AEFF00] [C0268818]
[C3AEFF50] [C0017F44]
[C3AEFF60] [C0018044]
[C3AEFF70] [C0046A90]
[C3AEFF90] [C0046D90]
[C3AEFFC0] [C0032AFC]
[C3AEFFF0] [C000F5AC]


Below is the code :
My ISR

irqreturn_t cpld_irq_handler(int irq, void * dev_id, struct pt_regs *regs)

{

wake_up(&cpld_intr_wait);

atomic_inc(&cpld_intr_data); /* incrementing this will indicate the poll() that the interrupt is occured */

return 0;

}

DRIVER_INIT
static int __init gpio_init(void)
{
        int ret = 0;
        int virq;


    atomic_set(&cpld_intr_data, 0);                     /* initialize the Interrupt indicator */
    init_waitqueue_head(&cpld_intr_wait);               /* Initialize the wait queue */

    virq = irq_create_mapping(NULL, CPLD1_INTERRUPT);


   if ((ret = request_irq(virq,cpld_irq_handler, 0, GPIO_CHAR_PATH, NULL))!=0)
   {
      printk(KERN_ERR "gpio_init: Could not grab IRQ line for CPLD ret = %d\n",ret);
          goto err1;
   }


        if((s_nGPIOMajor = register_chrdev(MPC8247_DEVICE_MAJOR_NUM, GPIO_CHAR_PATH, &gpio_fops))<0)
        {
                GPIO_DBG2("GPIO_DRIVER  : unable to get major %d\n", s_nGPIOMajor);
                return s_nGPIOMajor;

        }else{
                GPIO_DBG2("GPIO_DRIVER  : major = %x\n", s_nGPIOMajor );
        }

        return 0;

}

Thanks in Advance

Regards,
Smitha

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