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-rw-r--r--drivers/scsi/st.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/st.h b/drivers/scsi/st.h
index b7a07c7bf4f8..f3eee0f9f40c 100644
--- a/drivers/scsi/st.h
+++ b/drivers/scsi/st.h
@@ -78,7 +78,7 @@ struct st_modedef {
#define ST_MODE_SHIFT (7 - ST_NBR_MODE_BITS)
#define ST_MODE_MASK ((ST_NBR_MODES - 1) << ST_MODE_SHIFT)
-#define ST_MAX_TAPES 128
+#define ST_MAX_TAPES (1 << (20 - (ST_NBR_MODE_BITS + 1)))
#define ST_MAX_TAPE_ENTRIES (ST_MAX_TAPES << (ST_NBR_MODE_BITS + 1))
/* The status related to each partition */