usb-storage: ignore ZTE MF 823 card reader in mode 0x1225

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 <[e-mail]>
CC: [e-mail]
Reviewed-by: Lars Melin <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/storage/unusual_devs.h

···
 		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
 		US_FL_NO_READ_DISC_INFO ),
 
+/* Reported by Oliver Neukum <[e-mail]>
+ * 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 <[e-mail]>
  * This encrypted pen drive returns bogus data for the initial READ(10).
  */