am335x sdk7 request_irq works different

Slav Agafonov

I've moved to SDK7 from SDK6 and cant using request_irq in such code:

        rc=request_irq(7,(void*)dfifo_interrupt,0,"tmfifo",fifodev.pfifo);
        if (rc) {
                pr_err("Request irq=%d failed (%d)\n",fifodev.irq,rc);
                return -EBUSY;
        }

insmod shows:

Request irq=7 failed (-22).

I've changed FLAG field and it didnot help.

How can I correctly fix this code?

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

Hi Slav,

I will forward this to the SW team.

0 Georgi Karpov over 8 years ago

Expert 1185 points

Hi Slav,

Error code 22 indicates Invalid argument error.
Try to trace request_threaded_irq() function from kernel/irq/manage.c, that is called from request_irq(), to see what argument does not pass.

BR,
Georgi

0 Slav Agafonov over 8 years ago in reply to Georgi Karpov

Prodigy 60 points

I`vnot found way to use IRQ below 100 - my design-engs`s changed design IRQ line from 7 (NMI) to GPIO and all works now. Thanks!

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am335x sdk7 request_irq works different