#include <linux/chio.h> /* here are all the ioctls */
#include <linux/mutex.h>
#include <linux/idr.h>
-#include <linux/smp_lock.h>
#include <linux/slab.h>
#include <scsi/scsi.h>
MODULE_ALIAS_CHARDEV_MAJOR(SCSI_CHANGER_MAJOR);
MODULE_ALIAS_SCSI_DEVICE(TYPE_MEDIUM_CHANGER);
+static DEFINE_MUTEX(ch_mutex);
static int init = 1;
module_param(init, int, 0444);
MODULE_PARM_DESC(init, \
scsi_changer *ch;
int minor = iminor(inode);
- lock_kernel();
+ mutex_lock(&ch_mutex);
spin_lock(&ch_index_lock);
ch = idr_find(&ch_index_idr, minor);
if (NULL == ch || scsi_device_get(ch->device)) {
spin_unlock(&ch_index_lock);
- unlock_kernel();
+ mutex_unlock(&ch_mutex);
return -ENXIO;
}
spin_unlock(&ch_index_lock);
file->private_data = ch;
- unlock_kernel();
+ mutex_unlock(&ch_mutex);
return 0;
}
#ifdef CONFIG_COMPAT
.compat_ioctl = ch_ioctl_compat,
#endif
+ .llseek = noop_llseek,
};
static int __init init_ch_module(void)