[SCSI] st: fix test of value range in st_set_options()

value cannot logically be less than START and greater than BUFFERSIZE.

#define EXTENDED_SENSE_START  18

// vi include/scsi/scsi_cmnd.h +105
#define SCSI_SENSE_BUFFERSIZE 	96

[akpm@linux-foundation.org: fix warning]
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Kai Makisara <kai.makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 12d58a7..ad59abb 100644 (file)
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -2280,7 +2280,8 @@ static int st_set_options(struct scsi_tape *STp, long options)
        } else if (code == MT_ST_SET_CLN) {
                value = (options & ~MT_ST_OPTIONS) & 0xff;
                if (value != 0 &&
-                   value < EXTENDED_SENSE_START && value >= SCSI_SENSE_BUFFERSIZE)
+                       (value < EXTENDED_SENSE_START ||
+                               value >= SCSI_SENSE_BUFFERSIZE))
                        return (-EINVAL);
                STp->cln_mode = value;
                STp->cln_sense_mask = (options >> 8) & 0xff;