1 files changed, 26 insertions, 11 deletions

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 38bfdb0f6660..2bfc41ece0e1 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -462,11 +462,18 @@ urbs:
 
                 rcv->buffer = buf;
 
-                usb_fill_bulk_urb(rcv->urb, acm->dev,
-                                  acm->rx_endpoint,
-                                  buf->base,
-                                  acm->readsize,
-                                  acm_read_bulk, rcv);
+                if (acm->is_int_ep)
+                        usb_fill_int_urb(rcv->urb, acm->dev,
+                                         acm->rx_endpoint,
+                                         buf->base,
+                                         acm->readsize,
+                                         acm_read_bulk, rcv, acm->bInterval);
+                else
+                        usb_fill_bulk_urb(rcv->urb, acm->dev,
+                                          acm->rx_endpoint,
+                                          buf->base,
+                                          acm->readsize,
+                                          acm_read_bulk, rcv);
                 rcv->urb->transfer_dma = buf->dma;
                 rcv->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 
@@ -550,7 +557,7 @@ static void acm_waker(struct work_struct *waker)
 static int acm_tty_open(struct tty_struct *tty, struct file *filp)
 {
         struct acm *acm;
-        int rv = -EINVAL;
+        int rv = -ENODEV;
         int i;
         dbg("Entering acm_tty_open.");
 
@@ -677,7 +684,7 @@ static void acm_tty_close(struct tty_struct *tty, struct file *filp)
 
         /* Perform the closing process and see if we need to do the hardware
            shutdown */
-        if (tty_port_close_start(&acm->port, tty, filp) == 0)
+        if (!acm || tty_port_close_start(&acm->port, tty, filp) == 0)
                 return;
         acm_port_down(acm, 0);
         tty_port_close_end(&acm->port, tty);
@@ -740,7 +747,7 @@ static int acm_tty_chars_in_buffer(struct tty_struct *tty)
 {
         struct acm *acm = tty->driver_data;
         if (!ACM_READY(acm))
-                return -EINVAL;
+                return 0;
         /*
          * This is inaccurate (overcounts), but it works.
          */
@@ -1173,6 +1180,9 @@ made_compressed_probe:
         spin_lock_init(&acm->read_lock);
         mutex_init(&acm->mutex);
         acm->rx_endpoint = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress);
+        acm->is_int_ep = usb_endpoint_xfer_int(epread);
+        if (acm->is_int_ep)
+                acm->bInterval = epread->bInterval;
         tty_port_init(&acm->port);
         acm->port.ops = &acm_port_ops;
 
@@ -1227,9 +1237,14 @@ made_compressed_probe:
                         goto alloc_fail7;
                 }
 
-                usb_fill_bulk_urb(snd->urb, usb_dev,
-                        usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
-                        NULL, acm->writesize, acm_write_bulk, snd);
+                if (usb_endpoint_xfer_int(epwrite))
+                        usb_fill_int_urb(snd->urb, usb_dev,
+                                usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
+                                NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval);
+                else
+                        usb_fill_bulk_urb(snd->urb, usb_dev,
+                                usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress),
+                                NULL, acm->writesize, acm_write_bulk, snd);
                 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
                 snd->instance = acm;
         }