[PATCH 18/19] sr: simplify sr_block_revalidate_disk

[Christoph Hellwig]

Both callers have a valid CD struture available, so rely on that instead
of getting another reference.  Also move the function to avoid a forward
declaration.

Signed-off-by: Christoph Hellwig <h...@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumsh...@wdc.com>
---
 drivers/scsi/sr.c | 36 +++++++++++++-----------------------
 1 file changed, 13 insertions(+), 23 deletions(-)

diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 34be94b62523fa..2b43c0f97442d4 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -86,7 +86,6 @@ static int sr_remove(struct device *);
 static blk_status_t sr_init_command(struct scsi_cmnd *SCpnt);
 static int sr_done(struct scsi_cmnd *);
 static int sr_runtime_suspend(struct device *dev);
-static int sr_block_revalidate_disk(struct gendisk *disk);
 
 static const struct dev_pm_ops sr_pm_ops = {
        .runtime_suspend        = sr_runtime_suspend,
@@ -518,6 +517,17 @@ static blk_status_t sr_init_command(struct scsi_cmnd 
*SCpnt)
        return ret;
 }
 
+static void sr_revalidate_disk(struct scsi_cd *cd)
+{
+       struct scsi_sense_hdr sshdr;
+
+       /* if the unit is not ready, nothing more to do */
+       if (scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr))
+               return;
+       sr_cd_check(&cd->cdi);
+       get_sectorsize(cd);
+}
+
 static int sr_block_open(struct block_device *bdev, fmode_t mode)
 {
        struct scsi_cd *cd;
@@ -531,7 +541,7 @@ static int sr_block_open(struct block_device *bdev, fmode_t 
mode)
        sdev = cd->device;
        scsi_autopm_get_device(sdev);
        if (bdev_check_media_change(bdev))
-               sr_block_revalidate_disk(bdev->bd_disk);
+               sr_revalidate_disk(cd);
 
        mutex_lock(&cd->lock);
        ret = cdrom_open(&cd->cdi, bdev, mode);
@@ -660,26 +670,6 @@ static unsigned int sr_block_check_events(struct gendisk 
*disk,
        return ret;
 }
 
-static int sr_block_revalidate_disk(struct gendisk *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))
-               goto out;
-
-       sr_cd_check(&cd->cdi);
-       get_sectorsize(cd);
-out:
-       scsi_cd_put(cd);
-       return 0;
-}
-
 static const struct block_device_operations sr_bdops =
 {
        .owner          = THIS_MODULE,
@@ -803,7 +793,7 @@ static int sr_probe(struct device *dev)
 
        dev_set_drvdata(dev, cd);
        disk->flags |= GENHD_FL_REMOVABLE;
-       sr_block_revalidate_disk(disk);
+       sr_revalidate_disk(cd);
        device_add_disk(&sdev->sdev_gendev, disk, NULL);
 
        sdev_printk(KERN_DEBUG, sdev,
-- 
2.28.0