Struct mtget field mt_blkno -1 means it is unknown. Don't add anything
to it.
Signed-off-by: Kai Mäkisara <Kai.Makisara@xxxxxxxxxxx>
Reviewed-by: John Meneghini <jmeneghi@xxxxxxxxxx>
Tested-by: John Meneghini <jmeneghi@xxxxxxxxxx>
---
drivers/scsi/st.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index beb88f25dbb9..8d27e6caf027 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -3756,7 +3756,7 @@ static long st_ioctl(struct file *file, unsigned int cmd_in, unsigned long arg)
((STp->density << MT_ST_DENSITY_SHIFT) & MT_ST_DENSITY_MASK);
mt_status.mt_blkno = STps->drv_block;
mt_status.mt_fileno = STps->drv_file;
- if (STp->block_size != 0) {
+ if (STp->block_size != 0 && mt_status.mt_blkno >= 0) {
if (STps->rw == ST_WRITING)
mt_status.mt_blkno +=
(STp->buffer)->buffer_bytes / STp->block_size;
--
2.43.0
