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[Qemu-devel] [PATCH] SCSI: STARTSTOPUNIT only eject/load media if powerc
From: |
Ronnie Sahlberg |
Subject: |
[Qemu-devel] [PATCH] SCSI: STARTSTOPUNIT only eject/load media if powercondition is 0 |
Date: |
Sat, 28 Jul 2012 11:14:53 +1000 |
The START STOP UNIT command will only eject/load media if
power condition is zero.
If power condition is !0 then LOEJ and START will be ignored.
>From MMC (sbc contains similar wordings too)
The Power Conditions field requests the block device to be placed
in the power condition defined in
Table 558. If this field has a value other than 0h then the Start
and LoEj bits shall be ignored.
Signed-off-by: Ronnie Sahlberg <address@hidden>
---
hw/scsi-disk.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index 525816c..5426990 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -1244,6 +1244,12 @@ static int scsi_disk_emulate_start_stop(SCSIDiskReq *r)
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev);
bool start = req->cmd.buf[4] & 1;
bool loej = req->cmd.buf[4] & 2; /* load on start, eject on !start */
+ int pwrcnd = req->cmd.buf[4] & 0xf0;
+
+ if (pwrcnd) {
+ /* eject/load only happens for power condition == 0 */
+ return 0;
+ }
if (s->qdev.type == TYPE_ROM && loej) {
if (!start && !s->tray_open && s->tray_locked) {
--
1.7.3.1