Libmetal metal_device_open or metal_device_io_region error.

[Max4well]

I have a petalinux system and a few apps running at startup. Sometimes one or more applications get a libmetal error. I received errors from these functions "metal_device_open" or"metal_device_io_region". It happens once in 10 or 20 starts. When I received that error I tried to rerun the application manually and it ran fine. I only use the libmetal library to create shared memory between applications.

What could be the reason why I get this error at startup and not when I run it manually?
What is the reason why it happens occasionally?

[tnmysh]

That's interesting. Could you post what error messages you get?

[Max4well]

I received error in my initlibmetal function.

`#define SHM_DEV_NAME "3ed80000.shm"

#define BUS_NAME "platform"

int initlibmetal(void){

int ret;



struct metal_device *device = NULL;



ret = sys_init();

if (ret) {

    LPERROR("Failed to initialize libmetal\n");

    return ret;

}



ret = 0;



/* Open the shared memory device */

ret = metal_device_open(BUS_NAME, SHM_DEV_NAME, &device);

if (ret) {

    LPERROR("Failed to open device %s.\n", SHM_DEV_NAME);

    return ret;

}



/* get shared memory device IO region */

io = metal_device_io_region(device, 0);

if (!io) {

    LPERROR("Failed to get io region for %s.\n", device->name);

    ret = -ENODEV;

    if (device)

        metal_device_close(device);

}



return ret;

}

int sys_init()

{

struct metal_init_params init_param = METAL_INIT_DEFAULTS;

int ret;



ret = metal_init(&init_param);

if (ret)

    LPERROR("Failed to initialize libmetal\n");

return ret;

}`

I either get "Failed to open device 3ed80000.shm" or "Failed to get io region for 3ed80000.shm" .