[pso] [Probleme inregistrare device]
Andrei Cibotaru
andreicibotaru at gmail.com
Wed Mar 17 15:50:50 EET 2010
Salut,
Am si eu o mica problema cu prima cerinta din laboratorul 4. Incerc sa
inregistrez
un character device creat cu comanda:
mknod /dev/so2_cdev c 42 0
creat cu root.
Am scris urmatorul cod:
int err = register_chrdev_region(MKDEV(MY_MAJOR, MY_MINOR), NUM_MINORS,
MODULE_NAME);
if (err != 0)
{
printk(KERN_INFO "[so2_cdev]: Inregistrare failed");
return err;
}
unde macrourile au urmatoarele valori :
#define MY_MAJOR 42
#define MY_MINOR 0
#define NUM_MINORS 1
#define MODULE_NAME "so2_cdev"
in so2_cdev.c sursa din cadrul laboratorului 4.
Am compilat cu make si am dat insmod so2_cdev.ko.
Comanda la care primesc:
insmod: error inserting 'so2_cdev.ko': -1 Device or resource
busy
iar dmesg afiseaza :
[so2_cdev]: Inregistrare failed
Aveti careva idee ce as putea sa fac?
Merci,
--
Andrei Cibotaru
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