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scsi: cleanup scsi_clear_unit_attention()

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The previous commit moved the unit attention clearing when we create
the request. So now we can clean scsi_clear_unit_attention() to handle
only the case of the REPORT LUNS command: this is the only case in
which a UNIT ATTENTION is cleared without having been reported.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-ID: <20230712134352.118655-3-sgarzare@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Stefano Garzarella 2023-07-12 15:43:51 +02:00 • committed by Paolo Bonzini
parent 9472083e64
commit ba947dab98
1 changed files with 6 additions and 22 deletions
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28
hw/scsi/scsi-bus.c
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@ -828,26 +828,12 @@ static void scsi_clear_unit_attention(SCSIRequest *req)
return; return;
} }
if (req->dev->unit_attention.key != UNIT_ATTENTION &&
req->bus->unit_attention.key != UNIT_ATTENTION) {
return;
}
/*
* If an INQUIRY command enters the enabled command state,
* the device server shall [not] clear any unit attention condition;
* See also MMC-6, paragraphs 6.5 and 6.6.2.
*/
if (req->cmd.buf[0] == INQUIRY ||
req->cmd.buf[0] == GET_CONFIGURATION ||
req->cmd.buf[0] == GET_EVENT_STATUS_NOTIFICATION) {
return;
}
if (req->dev->unit_attention.key == UNIT_ATTENTION) { if (req->dev->unit_attention.key == UNIT_ATTENTION) {
ua = &req->dev->unit_attention; ua = &req->dev->unit_attention;
} else { } else if (req->bus->unit_attention.key == UNIT_ATTENTION) {
ua = &req->bus->unit_attention; ua = &req->bus->unit_attention;
} else {
return;
} }
/* /*
@ -856,12 +842,10 @@ static void scsi_clear_unit_attention(SCSIRequest *req)
* with an additional sense code of REPORTED LUNS DATA HAS CHANGED. * with an additional sense code of REPORTED LUNS DATA HAS CHANGED.
*/ */
if (req->cmd.buf[0] == REPORT_LUNS && if (req->cmd.buf[0] == REPORT_LUNS &&
!(ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc && ua->asc == SENSE_CODE(REPORTED_LUNS_CHANGED).asc &&
ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq)) { ua->ascq == SENSE_CODE(REPORTED_LUNS_CHANGED).ascq) {
return;
}
*ua = SENSE_CODE(NO_SENSE); *ua = SENSE_CODE(NO_SENSE);
}
} }
int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len) int scsi_req_get_sense(SCSIRequest *req, uint8_t *buf, int len)