On Fri, 2012-11-09 at 11:08 -0500, Jason J. Herne wrote:
> diff --git a/drivers/usb/storage/scsiglue.c
> b/drivers/usb/storage/scsiglue.c
> index 13b8bcd..6ff785e 100644
> --- a/drivers/usb/storage/scsiglue.c
> +++ b/drivers/usb/storage/scsiglue.c
> @@ -251,6 +251,11 @@ static int slave_configure(struct scsi_device
> *sdev)
> US_FL_SCM_MULT_TARG)) &&
> us->protocol == USB_PR_BULK)
> us->use_last_sector_hacks = 1;
> +
> + /* Force read-16 for large capacity drives. */
> + sdev->force_read_16 = 1;
> +
> +
This turns READ_16 on unconditionally for all USB disks ... is that
safe? As in have you tested this with older USB thumb drives?
Also do we have to worry about TYPE_RBC? ... this looks like a bit of a
global omission in usbstorage.c
> diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
> index 5591ed5..e92b846 100644
> --- a/include/scsi/scsi_device.h
> +++ b/include/scsi/scsi_device.h
> @@ -134,6 +134,7 @@ struct scsi_device {
> * because we did a bus reset. */
> unsigned use_10_for_rw:1; /* first try 10-byte read / write */
> unsigned use_10_for_ms:1; /* first try 10-byte mode
> sense/select */
> + unsigned force_read_16:1; /* Use read(16) over read(10) */
This should probably be use_16_for_rw:1 for consistency.
James
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