[PATCH 3.14 18/29] usb-storage: ignore ZTE MF 823 card reader in mode 0x1225
From: Greg Kroah-Hartman
Date: Sat Aug 08 2015 - 18:45:02 EST
3.14-stable review patch. If anyone has any objections, please let me know.
From: Oliver Neukum <oneukum@xxxxxxxx>
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
This replaces an earlier patch that ignored all LUNs of this device.
That patch was overly broad.
Signed-off-by: Oliver Neukum <oneukum@xxxxxxxx>
Reviewed-by: Lars Melin <larsm17@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
drivers/usb/storage/unusual_devs.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
@@ -2032,6 +2032,18 @@ UNUSUAL_DEV( 0x1908, 0x3335, 0x0200, 0x0
USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+/* Reported by Oliver Neukum <oneukum@xxxxxxxx>
+ * 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 WCDMA Technologies MSM",
+ USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+ US_FL_SINGLE_LUN ),
/* Reported by Sven Geggus <sven-usbst@xxxxxxxxxx>
* This encrypted pen drive returns bogus data for the initial READ(10).
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