bcachefs: More errcode cleanup

We shouldn't be overloading standard error codes now that we have
provisions for bcachefs-specific errorcodes: this patch converts super.c
and super-io.c to per error site errcodes, with a bit of cleanup.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 5 insertions, 2 deletions

diff --git a/fs/bcachefs/fs.c b/fs/bcachefs/fs.c
index 90297cfc7934..cc41472a335e 100644
--- a/fs/bcachefs/fs.c
+++ b/fs/bcachefs/fs.c
@@ -1767,8 +1767,11 @@ got_sb:
 	kfree(devs[0]);
 	kfree(devs);
 
-	if (IS_ERR(sb))
-		return ERR_CAST(sb);
+	if (IS_ERR(sb)) {
+		ret = PTR_ERR(sb);
+		ret = bch2_err_class(ret);
+		return ERR_PTR(ret);
+	}
 
 	c = sb->s_fs_info;