# Re: \[PATCH 16/19\] sd: use bdev\_check\_media\_change

- From: Sergei Shtylyov \<hidden\>
- Date: 2020-09-02 16:19:34 
- List: linux-raid
- Page: https://ratatoskr.run/linux-raid/2020/09/187868
- Thread: https://ratatoskr.run/linux-block/2020/09/187819/t.md

```text
On 9/2/20 5:12 PM, Christoph Hellwig wrote:

> Switch to use bdev_check_media_change instead of check_disk_change and
> call cd_revalidate_disk manually.  As sd also calls sd_revalidate_disk

   s/cd/sd/?

> manually during probe and open, , the extra call into ->revalidate_disk
> from bdev_disk_changed is not required either, so stop wiring up the
> method.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  drivers/scsi/sd.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
> index 2bec8cd526164d..d020639c28c6ca 100644
> --- a/drivers/scsi/sd.c
> +++ b/drivers/scsi/sd.c
> @@ -1381,8 +1381,10 @@ static int sd_open(struct block_device *bdev, fmode_t mode)
>  	if (!scsi_block_when_processing_errors(sdev))
>  		goto error_out;
>  
> -	if (sdev->removable || sdkp->write_prot)
> -		check_disk_change(bdev);
> +	if (sdev->removable || sdkp->write_prot) {
> +		if (bdev_check_media_change(bdev))
> +			sd_revalidate_disk(bdev->bd_disk);
> +	}
>  
>  	/*
>  	 * If the drive is empty, just let the open fail.
[...]

MBR, Sergei
```