Re: [PATCH 02/14] block: switch register_disk to use blkdev_get_by_dev

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Hello!

On 17.09.2020 19:57, Christoph Hellwig wrote:

Use blkdev_get_by_dev instead of open coding it using bdget_disk +
blkdev_get.

   I don't see where you are removing bdget_disk() call (situated just before
the below code?)...

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
  block/genhd.c | 7 +++----
  1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index 7b56203c90a303..f778716fac6cde 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -732,10 +732,9 @@ static void register_disk(struct device *parent, struct gendisk *disk,
  		goto exit;
set_bit(GD_NEED_PART_SCAN, &disk->state);
-	err = blkdev_get(bdev, FMODE_READ, NULL);
-	if (err < 0)
-		goto exit;
-	blkdev_put(bdev, FMODE_READ);
+	bdev = blkdev_get_by_dev(disk_devt(disk), FMODE_READ, NULL);
+	if (!IS_ERR(bdev))
+		blkdev_put(bdev, FMODE_READ);
exit:
  	/* announce disk after possible partitions are created */

MBR, Sergei



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