Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Thu,  6 Apr 2023 06:19:05 +0000
In-Reply-To: <20230406061905.2460827-1-badhri@google.com>
Mime-Version: 1.0
References: <20230406061905.2460827-1-badhri@google.com>
Message-ID: <20230406061905.2460827-2-badhri@google.com>
Subject: [PATCH v1 2/2] usb: gadget: udc: core: Prevent redundant calls to pullup
From:   Badhri Jagan Sridharan <badhri@google.com>
To:     gregkh@linuxfoundation.org, stern@rowland.harvard.edu,
        colin.i.king@gmail.com, xuetao09@huawei.com,
        quic_eserrao@quicinc.com, water.zhangjiantao@huawei.com,
        peter.chen@freescale.com, balbi@ti.com
Cc:     linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
        stable@vger.kernel.org, Badhri Jagan Sridharan <badhri@google.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

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.

Cc: stable@vger.kernel.org

Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Fixes: 5a1da544e572 ("usb: gadget: core: do not try to disconnect gadget if it is not connected")
---
 drivers/usb/gadget/udc/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index 890f92cb6344..7eeaf7dbb350 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -708,6 +708,9 @@ int usb_gadget_connect(struct usb_gadget *gadget)
 		goto out;
 	}
 
+	if (gadget->connected)
+		goto out;
+
 	if (gadget->deactivated) {
 		/*
 		 * If gadget is deactivated we only save new state.
-- 
2.40.0.348.gf938b09366-goog