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authorBen Efros <ben@pc-doctor.com>2008-11-18 13:31:13 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2009-01-07 09:59:55 -0800
commit1537e0ad944acf3a4c2b311a646d7993b89499f7 (patch)
tree991031a1d14089ba4a0794806c9d702d9764941b /drivers/usb/storage/scsiglue.c
parenta658367dae9dc572480f41817dbe1088a1a049ee (diff)
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>
Diffstat (limited to 'drivers/usb/storage/scsiglue.c')
-rw-r--r--drivers/usb/storage/scsiglue.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index 09779f6a817..1b35e011a34 100644
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -170,6 +170,10 @@ static int slave_configure(struct scsi_device *sdev)
if (us->fflags & US_FL_CAPACITY_HEURISTICS)
sdev->guess_capacity = 1;
+ /* assume SPC3 or latter devices support sense size > 18 */
+ if (sdev->scsi_level > SCSI_SPC_2)
+ us->fflags |= US_FL_SANE_SENSE;
+
/* Some devices report a SCSI revision level above 2 but are
* unable to handle the REPORT LUNS command (for which
* support is mandatory at level 3). Since we already have