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>
Subject: [PATCH v4 2/2] usb: gadget: udc: core: Prevent redundant calls to pullup
Date: Fri, 7 Apr 2023 03:07:41 +0000 [thread overview]
Message-ID: <20230407030741.3163220-2-badhri@google.com> (raw)
In-Reply-To: <20230407030741.3163220-1-badhri@google.com>
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
Fixes: 5a1da544e572 ("usb: gadget: core: do not try to disconnect gadget if it is not connected")
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
---
Changes since v3:
* none
Changes since v2:
* none
Changes since v1:
* Fixed commit message comments.
---
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 af92c2e8e10c..1c5403ce9e7c 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -703,6 +703,9 @@ 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.
--
2.40.0.577.gac1e443424-goog
next prev parent reply other threads:[~2023-04-07 3:08 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-07 3:07 [PATCH v4 1/2] usb: gadget: udc: core: Invoke usb_gadget_connect only when started Badhri Jagan Sridharan
2023-04-07 3:07 ` Badhri Jagan Sridharan [this message]
2023-05-16 12:53 ` Alistair
2023-05-17 10:23 ` Linux regression tracking (Thorsten Leemhuis)
2023-05-17 10:32 ` Badhri Jagan Sridharan
2023-05-17 10:35 ` Francesco Dolcini
2023-05-17 10:56 ` Linux regression tracking (Thorsten Leemhuis)
2023-05-17 17:45 ` Badhri Jagan Sridharan
2023-05-30 21:50 ` Avichal Rakesh
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