static int sr_block_open(struct block_device *bdev, fmode_t mode)
{
struct scsi_cd *cd;
+ struct scsi_device *sdev;
int ret = -ENXIO;
- mutex_lock(&sr_mutex);
cd = scsi_cd_get(bdev->bd_disk);
- if (cd) {
- ret = cdrom_open(&cd->cdi, bdev, mode);
- if (ret)
- scsi_cd_put(cd);
- }
+ if (!cd)
+ goto out;
+
+ sdev = cd->device;
+ scsi_autopm_get_device(sdev);
+ check_disk_change(bdev);
+
+ mutex_lock(&sr_mutex);
+ ret = cdrom_open(&cd->cdi, bdev, mode);
mutex_unlock(&sr_mutex);
+
+ scsi_autopm_put_device(sdev);
+ if (ret)
+ scsi_cd_put(cd);
+
+out:
return ret;
}
if (ret)
goto out;
+ scsi_autopm_get_device(sdev);
+
/*
* Send SCSI addressing ioctls directly to mid level, send other
* ioctls to cdrom/block level.
case SCSI_IOCTL_GET_IDLUN:
case SCSI_IOCTL_GET_BUS_NUMBER:
ret = scsi_ioctl(sdev, cmd, argp);
- goto out;
+ goto put;
}
ret = cdrom_ioctl(&cd->cdi, bdev, mode, cmd, arg);
if (ret != -ENOSYS)
- goto out;
+ goto put;
ret = scsi_ioctl(sdev, cmd, argp);
+put:
+ scsi_autopm_put_device(sdev);
+
out:
mutex_unlock(&sr_mutex);
return ret;
static unsigned int sr_block_check_events(struct gendisk *disk,
unsigned int clearing)
{
- struct scsi_cd *cd = scsi_cd(disk);
+ unsigned int ret = 0;
+ struct scsi_cd *cd;
- if (atomic_read(&cd->device->disk_events_disable_depth))
+ cd = scsi_cd_get(disk);
+ if (!cd)
return 0;
- return cdrom_check_events(&cd->cdi, clearing);
+ if (!atomic_read(&cd->device->disk_events_disable_depth))
+ ret = cdrom_check_events(&cd->cdi, clearing);
+
+ scsi_cd_put(cd);
+ return ret;
}
static int sr_block_revalidate_disk(struct gendisk *disk)
{
- struct scsi_cd *cd = scsi_cd(disk);
struct scsi_sense_hdr sshdr;
+ struct scsi_cd *cd;
+
+ cd = scsi_cd_get(disk);
+ if (!cd)
+ return -ENXIO;
/* if the unit is not ready, nothing more to do */
if (scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr))
sr_cd_check(&cd->cdi);
get_sectorsize(cd);
out:
+ scsi_cd_put(cd);
return 0;
}