linux-kernel - [PATCH] staging: vt6656: Fix crash when WLAN is turned off

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Date:   Thu, 3 Feb 2022 20:22:01 +0100
From:   Philipp Hortmann <philipp.g.hortmann@...il.com>
To:     Forest Bond <forest@...ttletooquiet.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: vt6656: Fix crash when WLAN is turned off

Stop submitting urbs before calling usb_kill_urb() and usb_free_urb().

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@...il.com>
---
 drivers/staging/vt6656/usbpipe.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/vt6656/usbpipe.c b/drivers/staging/vt6656/usbpipe.c
index 7f45734390f6..d505b4b69ba4 100644
--- a/drivers/staging/vt6656/usbpipe.c
+++ b/drivers/staging/vt6656/usbpipe.c
@@ -230,7 +230,9 @@ static void vnt_start_interrupt_urb_complete(struct urb *urb)
 	else
 		vnt_int_process_data(priv);
 
-	status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
+	if (!test_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags))
+		status = usb_submit_urb(priv->interrupt_urb, GFP_ATOMIC);
+
 	if (status)
 		dev_dbg(&priv->usb->dev, "Submit int URB failed %d\n", status);
 }
-- 
2.25.1