From: Aaron Lu <aaron.lu@xxxxxxx>
When application tries to access the ODD's block device by ioctl,
make sure ODD is in an active state.
Signed-off-by: Aaron Lu <aaron.lu@xxxxxxx>
Signed-off-by: Lin Ming <ming.m.lin@xxxxxxxxx>
---
drivers/scsi/sr.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 72488c2..3da0879 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -654,6 +654,13 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
void __user *argp = (void __user *)arg;
int ret;
+ /* Make sure the ODD is not suspended */
+ ret = pm_runtime_get_sync(&sdev->sdev_gendev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(&sdev->sdev_gendev);
+ return -EACCES;
+ }
+
mutex_lock(&sr_mutex);
/*
@@ -685,6 +692,8 @@ static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
out:
mutex_unlock(&sr_mutex);
+ pm_runtime_mark_last_busy(&cd->device->sdev_gendev);
+ pm_runtime_put_autosuspend(&cd->device->sdev_gendev);
return ret;
}
--
1.7.10
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