FAILED: patch "[PATCH] ext4: correct inconsistent error msg in nojournal mode" failed to apply to 5.15-stable tree

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

Possible dependencies:

89481b5fa8c0 ("ext4: correct inconsistent error msg in nojournal mode") 43bd6f1b49b6 ("ext4: goto right label 'failed_mount3a'")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 89481b5fa8c0640e62ba84c6020cee895f7ac643 Mon Sep 17 00:00:00 2001
From: Baokun Li <[email protected]>
Date: Wed, 9 Nov 2022 15:43:43 +0800
Subject: [PATCH] ext4: correct inconsistent error msg in nojournal mode

When we used the journal_async_commit mounting option in nojournal mode, the kernel told me that "can't mount with journal_checksum", was very confusing. I find that when we mount with journal_async_commit, both the JOURNAL_ASYNC_COMMIT and EXPLICIT_JOURNAL_CHECKSUM flags are set. However, in the error branch, CHECKSUM is checked before ASYNC_COMMIT. As a result, the above inconsistency occurs, and the ASYNC_COMMIT branch becomes dead code that cannot be executed. Therefore, we exchange the positions of the two judgments to make the error msg more accurate.

index f5e6919ea650..878be47faaaf 100644
@@ -5288,14 +5288,15 @@ static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb)
 		goto failed_mount3a;
 	} else {
 		/* Nojournal mode, all journal mount options are illegal */
-		if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) {
+		if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) {
 			ext4_msg(sb, KERN_ERR, "can't mount with "
-				 "journal_checksum, fs mounted w/o journal");
+				 "journal_async_commit, fs mounted w/o journal");
 			goto failed_mount3a;
 		}
-		if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) {
+
+		if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) {
 			ext4_msg(sb, KERN_ERR, "can't mount with "
-				 "journal_async_commit, fs mounted w/o journal");
+				 "journal_checksum, fs mounted w/o journal");
 			goto failed_mount3a;
 		}
 		if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) {