FAILED: patch "[PATCH] irqdomain: Fixed unbalanced fwnode get and put" failed to apply to 5.4-stable tree

The patch below does not apply to the 5.4-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]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y
git checkout FETCH_HEAD
git cherry-pick -x 6ce3e98184b625d2870991880bf9586ded7ea7f9
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2024073029-each-sprung-4744@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..

Possible dependencies:

6ce3e98184b6 ("irqdomain: Fixed unbalanced fwnode get and put") 67a4e1a3bf7c ("irqdomain: Use return value of strreplace()") ed1054a02aa2 ("irqdomain: Mark fwnodes when their irqdomain is added/removed") 181e9d4efaf6 ("irqdomain: Make __irq_domain_add() less OF-dependent")

thanks,

greg k-h

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

From 6ce3e98184b625d2870991880bf9586ded7ea7f9 Mon Sep 17 00:00:00 2001
From: Herve Codina <[email protected]>
Date: Fri, 14 Jun 2024 19:32:04 +0200
Subject: [PATCH] irqdomain: Fixed unbalanced fwnode get and put

fwnode_handle_get(fwnode) is called when a domain is created with fwnode passed as a function parameter. fwnode_handle_put(domain->fwnode) is called when the domain is destroyed but during the creation a path exists that does not set domain->fwnode.

If this path is taken, the fwnode get will never be put.

To avoid the unbalanced get and put, set domain->fwnode unconditionally.

index 28709c14d894..7b4d580fc8e4 100644
@@ -156,7 +156,6 @@ static struct irq_domain *__irq_domain_create(struct fwnode_handle *fwnode,
 		switch (fwid->type) {
 		case IRQCHIP_FWNODE_NAMED:
 		case IRQCHIP_FWNODE_NAMED_ID:
-			domain->fwnode = fwnode;
 			domain->name = kstrdup(fwid->name, GFP_KERNEL);
 			if (!domain->name) {
 				kfree(domain);

@@ -165,7 +164,6 @@ static struct irq_domain *__irq_domain_create(struct fwnode_handle *fwnode,
 			domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
 			break;
 		default:
-			domain->fwnode = fwnode;
 			domain->name = fwid->name;
 			break;
 		}

@@ -185,7 +183,6 @@ static struct irq_domain *__irq_domain_create(struct fwnode_handle *fwnode,
 		}
 
 		domain->name = strreplace(name, '/', ':');
-		domain->fwnode = fwnode;
 		domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
 	}
 

@@ -201,8 +198,8 @@ static struct irq_domain *__irq_domain_create(struct fwnode_handle *fwnode,
 		domain->flags |= IRQ_DOMAIN_NAME_ALLOCATED;
 	}
 
-	fwnode_handle_get(fwnode);
-	fwnode_dev_initialized(fwnode, true);
+	domain->fwnode = fwnode_handle_get(fwnode);
+	fwnode_dev_initialized(domain->fwnode, true);
 
 	/* Fill structure */
 	INIT_RADIX_TREE(&domain->revmap_tree, GFP_KERNEL);