[PATCH 3.4 041/107] usb-storage: ignore ZTE MF 823 card reader in mode 0x1225
Date: Wed Mar 16 2016 - 04:35:24 EST
From: Oliver Neukum <oneukum@xxxxxxxx>
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
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>
Signed-off-by: Zefan Li <lizefan@xxxxxxxxxx>
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
@@ -2019,6 +2019,18 @@ UNUSUAL_DEV( 0x1908, 0x3335, 0x0200, 0x0200,
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).