On 12/8/20 5:28 PM, Christoph Hellwig wrote:
Only a single caller can end up in bdev_read_only, so move the check
there.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx>
Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
---
block/genhd.c | 3 ---
fs/super.c | 3 ++-
2 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/block/genhd.c b/block/genhd.c
index b84b8671e6270a..8f2b89d1161813 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1652,11 +1652,8 @@ EXPORT_SYMBOL(set_disk_ro);
int bdev_read_only(struct block_device *bdev)
{
- if (!bdev)
- return 0;
return bdev->bd_read_only;
}
-
EXPORT_SYMBOL(bdev_read_only);
/*
diff --git a/fs/super.c b/fs/super.c
index 2c6cdea2ab2d9e..5a1f384ffc74f6 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -865,7 +865,8 @@ int reconfigure_super(struct fs_context *fc)
if (fc->sb_flags_mask & SB_RDONLY) {
#ifdef CONFIG_BLOCK
- if (!(fc->sb_flags & SB_RDONLY) && bdev_read_only(sb->s_bdev))
+ if (!(fc->sb_flags & SB_RDONLY) && sb->s_bdev &&
+ bdev_read_only(sb->s_bdev))
return -EACCES;
#endif
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Cheers,
Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
hare@xxxxxxx +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer
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