Listing 1. Test Bug
// Someone is opening our device
static int gOpen(struct inode *Inode, struct file *fp)
{
printk("%s: (%d:%d) open(%p, %p)\n",
GENTEST_MODULE_NAME,
MAJOR(Inode->i_rdev), MINOR(Inode->i_rdev),
Inode, fp);
// Increment our USE count. This is so no one
// can remove the module while it's being used.
MOD_INC_USE_COUNT;
// Hang when device 4 is opened
if (MINOR(Inode->i_rdev) == 4) {
int i;
printk("Computing pi to the last
decimal position . . .\n");
for (;;) i++;
}
return 0;
} // gOpen
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