USB Storage: indistinguishable devices with broken and unbroken firmware

there's a USB mass storage device which exists in two version. One
reports the correct size and the other does not. Apart from that they
are identical and cannot be told apart. Here's a heuristic based on the
empirical finding that drives have even sizes.


Signed-off-by: Oliver Neukum <oneukum@suse.de>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/linux/usb_usual.h b/include/linux/usb_usual.h
index 2ae76fe52ff7..1b792b9286ba 100644
--- a/include/linux/usb_usual.h
+++ b/include/linux/usb_usual.h
@@ -46,7 +46,9 @@
         US_FLAG(MAX_SECTORS_64, 0x00000400)                     \
                 /* Sets max_sectors to 64    */                 \
         US_FLAG(IGNORE_DEVICE,  0x00000800)                     \
-                /* Don't claim device */
+                /* Don't claim device */                        \
+        US_FLAG(CAPACITY_HEURISTICS,    0x00001000)             \
+                /* sometimes sizes is too big */
 
 #define US_FLAG(name, value)    US_FL_##name = value ,
 enum { US_DO_ALL_FLAGS };