1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index b9a6b7ad64f3..bc56770bcc90 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2021,7 +2021,13 @@ static int pkt_open(struct inode *inode, struct file *file)
         BUG_ON(pd->refcnt < 0);
 
         pd->refcnt++;
-        if (pd->refcnt == 1) {
+        if (pd->refcnt > 1) {
+                if ((file->f_mode & FMODE_WRITE) &&
+                    !test_bit(PACKET_WRITABLE, &pd->flags)) {
+                        ret = -EBUSY;
+                        goto out_dec;
+                }
+        } else {
                 if (pkt_open_dev(pd, file->f_mode & FMODE_WRITE)) {
                         ret = -EIO;
                         goto out_dec;