X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fscsi%2Fch.c;h=aa2011b6468387609993e2ab7643b8e40740c403;hb=25377479de7539fdc871a0f0ecaa39da42353bbc;hp=c4b938bc30d393f92eebaaf9c506009885f50176;hpb=28638ea4f8adb63f837e4436560ab16ab0388587;p=linux-2.6

diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index c4b938bc30..aa2011b646 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -22,6 +22,7 @@
 #include <linux/chio.h>			/* here are all the ioctls */
 #include <linux/mutex.h>
 #include <linux/idr.h>
+#include <linux/smp_lock.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
@@ -571,16 +572,19 @@ ch_open(struct inode *inode, struct file *file)
 	scsi_changer *ch;
 	int minor = iminor(inode);
 
+	lock_kernel();
 	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();
 		return -ENXIO;
 	}
 	spin_unlock(&ch_index_lock);
 
 	file->private_data = ch;
+	unlock_kernel();
 	return 0;
 }