[PATCH] USB Storage: US_FL_MAX_SECTORS_64 flag

[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 5715291ba5400d784ccb59841ef956a881dfb1e0..a4b7df9ff8c165fd3067f7c8e8ff5ead4becf2a4 100644 (file)
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -112,13 +112,11 @@ static int slave_configure(struct scsi_device *sdev)
        if (sdev->scsi_level < SCSI_2)
                sdev->scsi_level = sdev->sdev_target->scsi_level = SCSI_2;
 
-       /* According to the technical support people at Genesys Logic,
-        * devices using their chips have problems transferring more than
-        * 32 KB at a time.  In practice people have found that 64 KB
-        * works okay and that's what Windows does.  But we'll be
-        * conservative; people can always use the sysfs interface to
-        * increase max_sectors. */
-       if (le16_to_cpu(us->pusb_dev->descriptor.idVendor) == USB_VENDOR_ID_GENESYS &&
+       /* Many devices have trouble transfering more than 32KB at a time,
+        * while others have trouble with more than 64K. At this time we
+        * are limiting both to 32K (64 sectores).
+        */
+       if ((us->flags & US_FL_MAX_SECTORS_64) &&
                        sdev->request_queue->max_sectors > 64)
                blk_queue_max_sectors(sdev->request_queue, 64);