Messages in this thread Patch in this message | | | From | Lin Ming <> | Subject | [PATCH v5 12/12] [SCSI] sr: make sure ODD is in resumed state in block ioctl | Date | Mon, 18 Jun 2012 14:26:06 +0800 |
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From: Aaron Lu <aaron.lu@amd.com>
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@amd.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> --- 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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