uas: track urbs, kill inflight urbs on disconnect.

Use separate anchors for data and sense urbs, which
I think will be useful when implementing error handling.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index d8b7bc6ea141..875829a56183 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -41,6 +41,8 @@ struct sense_iu_old {
 struct uas_dev_info {
         struct usb_interface *intf;
         struct usb_device *udev;
+        struct usb_anchor sense_urbs;
+        struct usb_anchor data_urbs;
         int qdepth;
         unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe;
         unsigned use_streams:1;
@@ -396,6 +398,7 @@ static int uas_submit_sense_urb(struct Scsi_Host *shost,
                 usb_free_urb(urb);
                 return SCSI_MLQUEUE_DEVICE_BUSY;
         }
+        usb_anchor_urb(urb, &devinfo->sense_urbs);
         return 0;
 }
 
@@ -431,6 +434,7 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd,
                 }
                 cmdinfo->state &= ~SUBMIT_DATA_IN_URB;
                 cmdinfo->state |= DATA_IN_URB_INFLIGHT;
+                usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs);
         }
 
         if (cmdinfo->state & ALLOC_DATA_OUT_URB) {
@@ -450,6 +454,7 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd,
                 }
                 cmdinfo->state &= ~SUBMIT_DATA_OUT_URB;
                 cmdinfo->state |= DATA_OUT_URB_INFLIGHT;
+                usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs);
         }
 
         if (cmdinfo->state & ALLOC_CMD_URB) {
@@ -761,6 +766,8 @@ static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id)
 
         devinfo->intf = intf;
         devinfo->udev = udev;
+        init_usb_anchor(&devinfo->sense_urbs);
+        init_usb_anchor(&devinfo->data_urbs);
         uas_configure_endpoints(devinfo);
 
         result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 2);
@@ -804,6 +811,8 @@ static void uas_disconnect(struct usb_interface *intf)
         struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
 
         scsi_remove_host(shost);
+        usb_kill_anchored_urbs(&devinfo->sense_urbs);
+        usb_kill_anchored_urbs(&devinfo->data_urbs);
         uas_free_streams(devinfo);
         kfree(devinfo);
 }