USB: storage: add last-sector hacks

[linux-2.6-omap-h63xx.git] / drivers / usb / storage / scsiglue.c

diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index e9d6c196a7abdfc8872d580afe2c40abec9129ca..8d78084abf9f54773f9c82ab771435df257529cf 100644 (file)
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -208,6 +208,14 @@ static int slave_configure(struct scsi_device *sdev)
                 * sector in a larger then 1 sector read, since the performance
                 * impact is negible we set this flag for all USB disks */
                sdev->last_sector_bug = 1;
+
+               /* Enable last-sector hacks for single-target devices using
+                * the Bulk-only transport, unless we already know the
+                * capacity will be decremented or is correct. */
+               if (!(us->fflags & (US_FL_FIX_CAPACITY | US_FL_CAPACITY_OK |
+                                       US_FL_SCM_MULT_TARG)) &&
+                               us->protocol == US_PR_BULK)
+                       us->use_last_sector_hacks = 1;
        } else {
 
                /* Non-disk-type devices don't need to blacklist any pages