#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
+#include <linux/smp_lock.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/miscdevice.h>
static int
uctrl_open(struct inode *inode, struct file *file)
{
+ lock_kernel();
uctrl_get_event_status();
uctrl_get_external_status();
+ unlock_kernel();
return 0;
}
struct linux_prom_irqs tmp_irq[2];
unsigned int vaddr[2] = { 0, 0 };
int tmpnode, uctrlnode = prom_getchild(prom_root_node);
+ int err;
tmpnode = prom_searchsiblings(uctrlnode, "obio");
if(!driver->irq)
driver->irq = tmp_irq[0].pri;
- request_irq(driver->irq, uctrl_interrupt, 0, "uctrl", driver);
+ err = request_irq(driver->irq, uctrl_interrupt, 0, "uctrl", driver);
+ if (err) {
+ printk("%s: unable to register irq %d\n",
+ __func__, driver->irq);
+ return err;
+ }
if (misc_register(&uctrl_dev)) {
printk("%s: unable to get misc minor %d\n",
- __FUNCTION__, uctrl_dev.minor);
+ __func__, uctrl_dev.minor);
free_irq(driver->irq, driver);
return -ENODEV;
}