linux-kernel - [PATCH 5.15 089/135] usb: chipidea: udc: check request status before setting device address

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Date:   Mon, 27 Jun 2022 13:21:36 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Xu Yang <xu.yang_2@....com>
Subject: [PATCH 5.15 089/135] usb: chipidea: udc: check request status before setting device address

From: Xu Yang <xu.yang_2@....com>

commit b24346a240b36cfc4df194d145463874985aa29b upstream.

The complete() function may be called even though request is not
completed. In this case, it's necessary to check request status so
as not to set device address wrongly.

Fixes: 10775eb17bee ("usb: chipidea: udc: update gadget states according to ch9")
cc: <stable@...r.kernel.org>
Signed-off-by: Xu Yang <xu.yang_2@....com>
Link: https://lore.kernel.org/r/20220623030242.41796-1-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/usb/chipidea/udc.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1040,6 +1040,9 @@ isr_setup_status_complete(struct usb_ep
 	struct ci_hdrc *ci = req->context;
 	unsigned long flags;
 
+	if (req->status < 0)
+		return;
+
 	if (ci->setaddr) {
 		hw_usb_set_address(ci, ci->address);
 		ci->setaddr = false;