diff mbox series

[v2,1/3] scsi: st: Don't modify unknown block number in MTIOCGET

Message ID 20241106095723.63254-2-Kai.Makisara@kolumbus.fi (mailing list archive)
State Under Review
Headers show
Series scsi: st: Device reset patches | expand

Commit Message

Kai Mäkisara Nov. 6, 2024, 9:57 a.m. UTC 
Struct mtget field mt_blkno -1 means it is unknown. Don't add anything
to it.

Signed-off-by: Kai Mäkisara <Kai.Makisara@kolumbus.fi>
Reviewed-by: John Meneghini <jmeneghi@redhat.com>
Tested-by: John Meneghini <jmeneghi@redhat.com>
---
 drivers/scsi/st.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

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;