linux-kernel - [PATCH] drv/usb: Fix the issue with Realtek USB wireless adapter AC650

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Date: Tue, 25 Jun 2024 15:07:24 +0800
From: tuhaowen <tuhaowen@...ontech.com>
To: stern@...land.harvard.edu,
	gregkh@...uxfoundation.org
Cc: linux-usb@...r.kernel.org,
	usb-storage@...ts.one-eyed-alien.net,
	linux-kernel@...r.kernel.org,
	wangyuli@...ontech.com,
	tuhaowen <tuhaowen@...ontech.com>
Subject: [PATCH] drv/usb: Fix the issue with Realtek USB wireless adapter AC650

Due to the dual-mode functionality of the Realtek USB wireless
adapter AC650, it initially presents itself as a flash drive
before the driver is installed.

In Linux, multi-state devices are recognized as storage devices
on startup because the driver has not yet been loaded.

As a result, the AC650 is identified as a DISK device at boot,
preventing the use of its WLAN mode. The issue can only be
resolved by unplugging and replugging the adapter.

Signed-off-by: tuhaowen <tuhaowen@...ontech.com>
---
 drivers/usb/storage/unusual_devs.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h
index fd68204374f2..f660d3e52436 100644
--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -1487,6 +1487,12 @@ UNUSUAL_DEV( 0x0bc2, 0x3332, 0x0000, 0x9999,
 		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
 		US_FL_NO_WP_DETECT ),
 
+UNUSUAL_DEV(0x0bda, 0x1a2b, 0x0000, 0x9999,
+		"Realtek",
+		"USB Network Device",
+		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+		US_FL_IGNORE_DEVICE),
+
 UNUSUAL_DEV(  0x0d49, 0x7310, 0x0000, 0x9999,
 		"Maxtor",
 		"USB to SATA",
-- 
2.20.1