diff mbox series

[v2,3/3] scsi: st: New session only when Unit Attention for new tape

Message ID 20241106102316.63462-1-Kai.Makisara@kolumbus.fi (mailing list archive)
State Accepted
Headers show
Series None | expand

Commit Message

Kai Mäkisara (Kolumbus) Nov. 6, 2024, 10:23 a.m. UTC
Currently the code starts new tape session when any Unit Attention
(UA) is seen when opening the device. This leads to incorrectly
clearing pos_unknown when the UA is for reset. Set new session only
when the UA is for a new tape.

Signed-off-by: Kai Mäkisara <Kai.Makisara@kolumbus.fi>
---
 drivers/scsi/st.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Comments

John Meneghini Nov. 6, 2024, 2:34 p.m. UTC | #1
Reviewed-by: John Meneghini <jmeneghi@redhat.com>
Tested-by: John Meneghini <jmeneghi@redhat.com>

On 11/6/24 05:23, Kai Mäkisara wrote:
> Currently the code starts new tape session when any Unit Attention
> (UA) is seen when opening the device. This leads to incorrectly
> clearing pos_unknown when the UA is for reset. Set new session only
> when the UA is for a new tape.
> 
> Signed-off-by: Kai Mäkisara <Kai.Makisara@kolumbus.fi>
> ---
>   drivers/scsi/st.c | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
> index c9038284bc89..e8ef27d7ef61 100644
> --- a/drivers/scsi/st.c
> +++ b/drivers/scsi/st.c
> @@ -991,7 +991,10 @@ static int test_ready(struct scsi_tape *STp, int do_wait)
>   			scode = cmdstatp->sense_hdr.sense_key;
>   
>   			if (scode == UNIT_ATTENTION) { /* New media? */
> -				new_session = 1;
> +				if (cmdstatp->sense_hdr.asc == 0x28) { /* New media */
> +					new_session = 1;
> +					DEBC_printk(STp, "New tape session.");
> +				}
>   				if (attentions < MAX_ATTENTIONS) {
>   					attentions++;
>   					continue;
diff mbox series

Patch

diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index c9038284bc89..e8ef27d7ef61 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -991,7 +991,10 @@  static int test_ready(struct scsi_tape *STp, int do_wait)
 			scode = cmdstatp->sense_hdr.sense_key;
 
 			if (scode == UNIT_ATTENTION) { /* New media? */
-				new_session = 1;
+				if (cmdstatp->sense_hdr.asc == 0x28) { /* New media */
+					new_session = 1;
+					DEBC_printk(STp, "New tape session.");
+				}
 				if (attentions < MAX_ATTENTIONS) {
 					attentions++;
 					continue;