usb-host: fix host close

The whole usb_host_close() function is skipped in case the device is not
in attached state.  This is wrong though, only then usb_device_detach()
must be skipped, all other cleanup (especially device reset and closing
the file handle) still needs to be done.  There are code paths where
usb_host_close() is called with the device in detached state already.

This fixes usb-host devices not being released and returned to the host
after removing them with device_del.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/usb-linux.c b/usb-linux.c
index 7d4d1d7bcf..f086d57edb 100644
--- a/usb-linux.c
+++ b/usb-linux.c
@@ -1349,7 +1349,7 @@ static int usb_host_close(USBHostDevice *dev)
 {
     int i;
 
-    if (dev->fd == -1 || !dev->dev.attached) {
+    if (dev->fd == -1) {
         return -1;
     }
 
@@ -1367,7 +1367,9 @@ static int usb_host_close(USBHostDevice *dev)
     }
     async_complete(dev);
     dev->closing = 0;
-    usb_device_detach(&dev->dev);
+    if (dev->dev.attached) {
+        usb_device_detach(&dev->dev);
+    }
     ioctl(dev->fd, USBDEVFS_RESET);
     close(dev->fd);
     dev->fd = -1;