usb: gadget: udc: core: Prevent redundant calls to pullup

commit a3afbf5cc887fc3401f012fe629810998ed61859 upstream.

usb_gadget_connect calls gadget->ops->pullup without checking whether
gadget->connected was previously set. Make this symmetric to
usb_gadget_disconnect by returning early if gadget->connected is
already set.

Fixes: 5a1da544e572 ("usb: gadget: core: do not try to disconnect gadget if it is not connected")
Cc: stable@vger.kernel.org
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20230407030741.3163220-2-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index ebb2b839b470b64c20a21f817c943f5e4750bc88..b14cbd0a6d013ca7d2dd114cbcdccf56c63d950d 100644 (file)
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -676,6 +676,9 @@ static int usb_gadget_connect_locked(struct usb_gadget *gadget)
                goto out;
        }
 
+       if (gadget->connected)
+               goto out;
+
        if (gadget->deactivated || !gadget->udc->started) {
                /*
                 * If gadget is deactivated we only save new state.