The scsi command to close tray only starts the motor and does not wait
for the tray to close. Wait until the state chages from TRAY_OPEN so
users do not race with the tray closing.
This looks like inifinte wait but unless the drive is broken it either
closes the tray within a few seconds or reports an error when it detects
the tray is blocked. At worst the wait can be interrupted by user.
Signed-off-by: Michal Suchanek <msuchanek@xxxxxxx>
---
v2:
- check drive_status exists before using it
- rename tray_close -> cdrom_tray_close
---
drivers/cdrom/cdrom.c | 21 +++++++++++++++++++--
1 file changed, 19 insertions(+), 2 deletions(-)
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 89746b3d193f..69e85c902373 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -281,7 +281,9 @@
#include <linux/fcntl.h>
#include <linux/blkdev.h>
#include <linux/times.h>
+#include <linux/delay.h>
#include <linux/uaccess.h>
+#include <linux/sched/signal.h>
#include <scsi/scsi_request.h>
/* used to tell the module to turn on full debugging messages */
@@ -1030,6 +1032,18 @@ static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
tracks->cdi, tracks->xa);
}
+static int cdrom_tray_close(struct cdrom_device_info *cdi)
+{
+ int ret;
+
+ ret = cdi->ops->tray_move(cdi, 0);
+ if (ret || !cdi->ops->drive_status)
+ return ret;
+
+ return poll_event_interruptible(CDS_TRAY_OPEN !=
+ cdi->ops->drive_status(cdi, CDSL_CURRENT), 500);
+}
+
static
int open_for_common(struct cdrom_device_info *cdi, tracktype *tracks)
{
@@ -1048,7 +1062,9 @@ int open_for_common(struct cdrom_device_info *cdi, tracktype *tracks)
if (CDROM_CAN(CDC_CLOSE_TRAY) &&
cdi->options & CDO_AUTO_CLOSE) {
cd_dbg(CD_OPEN, "trying to close the tray\n");
- ret = cdo->tray_move(cdi, 0);
+ ret = cdrom_tray_close(cdi);
+ if (ret == -ERESTARTSYS)
+ return ret;
if (ret) {
cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
/* Ignore the error from the low
@@ -2312,7 +2328,8 @@ static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
if (!CDROM_CAN(CDC_CLOSE_TRAY))
return -ENOSYS;
- return cdi->ops->tray_move(cdi, 0);
+
+ return cdrom_tray_close(cdi);
}
static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
--
2.13.6
