[PATCH 4/4] dm: use bdev_read_only to check if a device is read-only

Christoph Hellwig
2020-11-29T18:21:06Z

dm-thin and dm-cache also work on partitions, so use the proper
interface to check if the device is read-only.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/md/dm-cache-metadata.c | 2 +-
drivers/md/dm-thin-metadata.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/md/dm-cache-metadata.c b/drivers/md/dm-cache-metadata.c
index af6d4f898e4c1d..89a73204dbf47f 100644
--- a/drivers/md/dm-cache-metadata.c
+++ b/drivers/md/dm-cache-metadata.c
@@ -449,7 +449,7 @@ static int __check_incompat_features(struct cache_disk_superblock *disk_super,
/*
* Check for read-only metadata to skip the following RDWR checks.
*/
- if (get_disk_ro(cmd->bdev->bd_disk))
+ if (bdev_read_only(cmd->bdev))
return 0;

features = le32_to_cpu(disk_super->compat_ro_flags) & ~DM_CACHE_FEATURE_COMPAT_RO_SUPP;
diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index 6ebb2127f3e2e0..e75b20480e460e 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -636,7 +636,7 @@ static int __check_incompat_features(struct thin_disk_superblock *disk_super,
/*
* Check for read-only metadata to skip the following RDWR checks.
*/
- if (get_disk_ro(pmd->bdev->bd_disk))
+ if (bdev_read_only(pmd->bdev))
return 0;

features = le32_to_cpu(disk_super->compat_ro_flags) & ~THIN_FEATURE_COMPAT_RO_SUPP;
--
2.29.2