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scsi: st: New session only when Unit Attention for new tape

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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>
Link: https://lore.kernel.org/r/20241106095723.63254-4-Kai.Makisara@kolumbus.fi
Reviewed-by: John Meneghini <jmeneghi@redhat.com>
Tested-by: John Meneghini <jmeneghi@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Kai Mäkisara 2024-11-06 11:57:23 +02:00 committed by Martin K. Petersen
parent 0b120edb37
commit a4550b28c8
1 changed files with 4 additions and 1 deletions
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5
drivers/scsi/st.c
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@ -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;