1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index d42fa6468f41..ba9c3e0387ce 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -467,22 +467,27 @@ static int sr_prep_fn(struct request_queue *q, struct request *rq)
 
 static int sr_block_open(struct block_device *bdev, fmode_t mode)
 {
-        struct scsi_cd *cd = scsi_cd_get(bdev->bd_disk);
+        struct scsi_cd *cd;
         int ret = -ENXIO;
 
+        lock_kernel();
+        cd = scsi_cd_get(bdev->bd_disk);
         if (cd) {
                 ret = cdrom_open(&cd->cdi, bdev, mode);
                 if (ret)
                         scsi_cd_put(cd);
         }
+        unlock_kernel();
         return ret;
 }
 
 static int sr_block_release(struct gendisk *disk, fmode_t mode)
 {
         struct scsi_cd *cd = scsi_cd(disk);
+        lock_kernel();
         cdrom_release(&cd->cdi, mode);
         scsi_cd_put(cd);
+        unlock_kernel();
         return 0;
 }