1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c
index d5df8dd9d58e..a341dde6f9c3 100644
--- a/drivers/usb/gadget/printer.c
+++ b/drivers/usb/gadget/printer.c
@@ -794,12 +794,14 @@ printer_write(struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
 }
 
 static int
-printer_fsync(struct file *fd, int datasync)
+printer_fsync(struct file *fd, loff_t start, loff_t end, int datasync)
 {
         struct printer_dev      *dev = fd->private_data;
+        struct inode *inode = fd->f_path.dentry->d_inode;
         unsigned long           flags;
         int                     tx_list_empty;
 
+        mutex_lock(&inode->i_mutex);
         spin_lock_irqsave(&dev->lock, flags);
         tx_list_empty = (likely(list_empty(&dev->tx_reqs)));
         spin_unlock_irqrestore(&dev->lock, flags);
@@ -809,6 +811,7 @@ printer_fsync(struct file *fd, int datasync)
                 wait_event_interruptible(dev->tx_flush_wait,
                                 (likely(list_empty(&dev->tx_reqs_active))));
         }
+        mutex_unlock(&inode->i_mutex);
 
         return 0;
 }