Simply set error code to -EEXIST when quota limit is already enabled in
dquot_quota_enable to remove unnecessary error code translation.

Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
---
 fs/quota/dquot.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 2ca1f16689de..fdf19360ffc9 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -2598,7 +2598,8 @@ static int dquot_quota_enable(struct super_block *sb, unsigned int flags)
 			goto out_err;
 		}
 		if (sb_has_quota_limits_enabled(sb, type)) {
-			ret = -EBUSY;
+			/* compatible with XFS */
+			ret = -EEXIST;
 			goto out_err;
 		}
 		spin_lock(&dq_state_lock);
@@ -2612,9 +2613,6 @@ static int dquot_quota_enable(struct super_block *sb, unsigned int flags)
 		if (flags & qtype_enforce_flag(type))
 			dquot_disable(sb, type, DQUOT_LIMITS_ENABLED);
 	}
-	/* Error code translation for better compatibility with XFS */
-	if (ret == -EBUSY)
-		ret = -EEXIST;
 	return ret;
 }
 
-- 
2.30.0