USB: add support for Motorola ROKR Z6 cellphone in mass storage mode

Motorola ROKR Z6 cellphone has bugs in its USB, so it is impossible to use
it as mass storage. Patch describes new "unusual" USB device for it with
FIX_INQUIRY and FIX_CAPACITY flags and new BULK_IGNORE_TAG flag.
Last flag relaxes check for equality of bcs->Tag and us->tag in
usb_stor_Bulk_transport routine.

Signed-off-by: Constantin Baranov <const@tltsu.ru>
Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Daniel Drake <dsd@gentoo.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/storage/transport.c

@@ -1009,7 +1009,8 @@ int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us)
 	US_DEBUGP("Bulk Status S 0x%x T 0x%x R %u Stat 0x%x\n",
 			le32_to_cpu(bcs->Signature), bcs->Tag, 
 			residue, bcs->Status);
-	if (bcs->Tag != us->tag || bcs->Status > US_BULK_STAT_PHASE) {
+	if (!(bcs->Tag == us->tag || (us->flags & US_FL_BULK_IGNORE_TAG)) ||
+		bcs->Status > US_BULK_STAT_PHASE) {
 		US_DEBUGP("Bulk logical error\n");
 		return USB_STOR_TRANSPORT_ERROR;
 	}

drivers/usb/storage/unusual_devs.h

@@ -1589,6 +1589,17 @@ UNUSUAL_DEV(  0x22b8, 0x4810, 0x0001, 0x0001,
 		US_SC_DEVICE, US_PR_DEVICE, NULL,
 		US_FL_FIX_CAPACITY),
 
+/*
+ * Patch by Constantin Baranov <const@tltsu.ru>
+ * Report by Andreas Koenecke.
+ * Motorola ROKR Z6.
+ */
+UNUSUAL_DEV(  0x22b8, 0x6426, 0x0101, 0x0101,
+		"Motorola",
+		"MSnc.",
+		US_SC_DEVICE, US_PR_DEVICE, NULL,
+		US_FL_FIX_INQUIRY | US_FL_FIX_CAPACITY | US_FL_BULK_IGNORE_TAG),
+
 /* Reported by Radovan Garabik <garabik@kassiopeia.juls.savba.sk> */
 UNUSUAL_DEV(  0x2735, 0x100b, 0x0000, 0x9999,
 		"MPIO",

include/linux/usb_usual.h

@@ -50,7 +50,9 @@
 	US_FLAG(CAPACITY_HEURISTICS,	0x00001000)		\
 		/* sometimes sizes is too big */		\
 	US_FLAG(MAX_SECTORS_MIN,0x00002000)			\
-		/* Sets max_sectors to arch min */
+		/* Sets max_sectors to arch min */		\
+	US_FLAG(BULK_IGNORE_TAG,0x00004000)			\
+		/* Ignore tag mismatch in bulk operations */
 
 
 #define US_FLAG(name, value)	US_FL_##name = value ,