linux-kernel - [PATCH 3.4 041/107] usb-storage: ignore ZTE MF 823 card reader in mode 0x1225

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Message-Id: <1458115601-5762-41-git-send-email-lizf@kernel.org>
Date:	Wed, 16 Mar 2016 16:05:35 +0800
From:	lizf@...nel.org
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Oliver Neukum <oneukum@...e.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Zefan Li <lizefan@...wei.com>
Subject: [PATCH 3.4 041/107] usb-storage: ignore ZTE MF 823 card reader in mode 0x1225

From: Oliver Neukum <oneukum@...e.com>

3.4.111-rc1 review patch.  If anyone has any objections, please let me know.

------------------


commit 5fb2c782f451a4fb9c19c076e2c442839faf0f76 upstream.

This device automatically switches itself to another mode (0x1405)
unless the specific access pattern of Windows is followed in its
initial mode. That makes a dirty unmount of the internal storage
devices inevitable if they are mounted. So the card reader of
such a device should be ignored, lest an unclean removal become
inevitable.

This replaces an earlier patch that ignored all LUNs of this device.
That patch was overly broad.

Signed-off-by: Oliver Neukum <oneukum@...e.com>
Reviewed-by: Lars Melin <larsm17@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Zefan Li <lizefan@...wei.com>
---
 drivers/usb/storage/unusual_devs.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h
index d0ecaf9..61f93ea 100644
--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -2019,6 +2019,18 @@ UNUSUAL_DEV( 0x1908, 0x3335, 0x0200, 0x0200,
 		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
 		US_FL_NO_READ_DISC_INFO ),
 
+/* Reported by Oliver Neukum <oneukum@...e.com>
+ * This device morphes spontaneously into another device if the access
+ * pattern of Windows isn't followed. Thus writable media would be dirty
+ * if the initial instance is used. So the device is limited to its
+ * virtual CD.
+ * And yes, the concept that BCD goes up to 9 is not heeded */
+UNUSUAL_DEV( 0x19d2, 0x1225, 0x0000, 0xffff,
+		"ZTE,Incorporated",
+		"ZTE WCDMA Technologies MSM",
+		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+		US_FL_SINGLE_LUN ),
+
 /* Reported by Sven Geggus <sven-usbst@...gus.net>
  * This encrypted pen drive returns bogus data for the initial READ(10).
  */
-- 
1.9.1