driver -> user space async communication

[Victor Librado <vlibrado@xxxxxxxxxxxxxxxx>]

I have two drivers, gpio and rf. They both communicate with user space 
aynchronously. Here is the code. The problem is that setting at same 
time both gpio_in_init and rf_init causes that only the last sighandler 
is called.

How can I solve this and have both sighandlers called when a SIGIO event 
is signalled by the respective driver?

USER SPACE:

void gpio_in_init(void){
    gpio_in_file=open("/dev/gpio_in",O_RDWR | O_NONBLOCK,0);
    //set fcntl
    memset(&actiongpi,0,sizeof(actiongpi));
    actiongpi.sa_handler=sighandler;
    actiongpi.sa_flags=0;
    sigaction(SIGIO,&actiongpi,NULL);
    fcntl(gpio_in_file,F_SETOWN,getpid());
    fcntl(gpio_in_file,F_SETFL, fcntl(gpio_in_file, F_GETFL)|FASYNC);
}

void rf_init(void){
    gpio_in_file=open("/dev/gpio_in",O_RDWR | O_NONBLOCK,0);
    //set fcntl
    memset(&actiongpi,0,sizeof(actiongpi));
    actiongpi.sa_handler=sighandler;
    actiongpi.sa_flags=0;
    sigaction(SIGIO,&actiongpi,NULL);
    fcntl(gpio_in_file,F_SETOWN,getpid());
    fcntl(gpio_in_file,F_SETFL, fcntl(gpio_in_file, F_GETFL)|FASYNC);
}

KERNEL SPACE:

kill_fasync(&async_queue, SIGIO, POLL_IN); In both gpio and rf drivers.

 

 

 

Victor Librado Sancho
Departamento I+D
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