USB: storage devices and SAT

Add the SANE SENSE flag to indicate that a device is capable of handling
more than 18-bytes of sense data.  This functionality is required for
USB-ATA bridges implementing SAT.  A future patch will actually enable this
function for several devices.

The logic behind this is that we can detect support for SANE_SENSE in a few ways:
 1) ATA PASS THROUGH (12) or (16) execute successfully
 2) SPC-3 or higher is in use
 3) A previous CHECK CONDITION occurred with sense format 70-73 and had
    a length greater than 18-bytes total

Signed-off-by: Ben Efros <ben@pc-doctor.com>
Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 2 deletions

diff --git a/include/linux/usb_usual.h b/include/linux/usb_usual.h
index d9a3bbe38e6b..998e5cbbf29e 100644
--- a/include/linux/usb_usual.h
+++ b/include/linux/usb_usual.h
@@ -52,8 +52,9 @@
         US_FLAG(MAX_SECTORS_MIN,0x00002000)                     \
                 /* Sets max_sectors to arch min */              \
         US_FLAG(BULK_IGNORE_TAG,0x00004000)                     \
-                /* Ignore tag mismatch in bulk operations */
-
+                /* Ignore tag mismatch in bulk operations */    \
+        US_FLAG(SANE_SENSE,     0x00008000)
+                /* Sane Sense (> 18 bytes) */
 
 #define US_FLAG(name, value)    US_FL_##name = value ,
 enum { US_DO_ALL_FLAGS };