This patch is setting the client status to Disconnected, when the
client is still in use. Otherwiese a disconnected usb cable would run
any use of the mount to faults.

Fixes: a3be076dc174 ("net/9p/usbg: Add new usb gadget function transport")
Cc: stable@vger.kernel.org
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
---
 net/9p/trans_usbg.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/9p/trans_usbg.c b/net/9p/trans_usbg.c
index fb05198dc2a7d604cfad2db26a63e40e632651a2..6ddf6886dbadd7cdfdebb96dc767874169ccb16e 100644
--- a/net/9p/trans_usbg.c
+++ b/net/9p/trans_usbg.c
@@ -779,7 +779,12 @@ static int usb9pfs_set_alt(struct usb_function *f,
 static void usb9pfs_disable(struct usb_function *f)
 {
 	struct f_usb9pfs *usb9pfs = func_to_usb9pfs(f);
+	unsigned long flags;
 
+	spin_lock_irqsave(&usb9pfs->lock, flags);
+	if (usb9pfs->client)
+		usb9pfs->client->status = Disconnected;
+	spin_unlock_irqrestore(&usb9pfs->lock, flags);
 	usb9pfs_clear_tx(usb9pfs);
 }
 

-- 
2.47.3