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Diffstat (limited to 'drivers/scsi/osst.c')
-rw-r--r--drivers/scsi/osst.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c
index 664c1238a87f..be3c73ebbfde 100644
--- a/drivers/scsi/osst.c
+++ b/drivers/scsi/osst.c
@@ -139,7 +139,7 @@ static int debugging = 1;
#define OSST_TIMEOUT (200 * HZ)
#define OSST_LONG_TIMEOUT (1800 * HZ)
-#define TAPE_NR(x) (iminor(x) & ~(-1 << ST_MODE_SHIFT))
+#define TAPE_NR(x) (iminor(x) & ((1 << ST_MODE_SHIFT)-1))
#define TAPE_MODE(x) ((iminor(x) & ST_MODE_MASK) >> ST_MODE_SHIFT)
#define TAPE_REWIND(x) ((iminor(x) & 0x80) == 0)
#define TAPE_IS_RAW(x) (TAPE_MODE(x) & (ST_NBR_MODES >> 1))