linux-kernel - [PATCH 07/17] firewire: core: use guard macro to maintain the list of address handler for transaction

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Message-ID: <20240804130225.243496-8-o-takashi@sakamocchi.jp>
Date: Sun,  4 Aug 2024 22:02:14 +0900
From: Takashi Sakamoto <o-takashi@...amocchi.jp>
To: linux1394-devel@...ts.sourceforge.net
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 07/17] firewire: core: use guard macro to maintain the list of address handler for transaction

The core function maintains address handlers by list. It is protected by
spinlock to insert and remove entry to the list.

This commit uses guard macro to maintain the spinlock.

Signed-off-by: Takashi Sakamoto <o-takashi@...amocchi.jp>
---
 drivers/firewire/core-transaction.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c
index a0224d4d8e11..a006daf385e9 100644
--- a/drivers/firewire/core-transaction.c
+++ b/drivers/firewire/core-transaction.c
@@ -596,7 +596,7 @@ int fw_core_add_address_handler(struct fw_address_handler *handler,
 	    handler->length == 0)
 		return -EINVAL;
 
-	spin_lock(&address_handler_list_lock);
+	guard(spinlock)(&address_handler_list_lock);
 
 	handler->offset = region->start;
 	while (handler->offset + handler->length <= region->end) {
@@ -615,8 +615,6 @@ int fw_core_add_address_handler(struct fw_address_handler *handler,
 		}
 	}
 
-	spin_unlock(&address_handler_list_lock);
-
 	return ret;
 }
 EXPORT_SYMBOL(fw_core_add_address_handler);
@@ -632,9 +630,9 @@ EXPORT_SYMBOL(fw_core_add_address_handler);
  */
 void fw_core_remove_address_handler(struct fw_address_handler *handler)
 {
-	spin_lock(&address_handler_list_lock);
-	list_del_rcu(&handler->link);
-	spin_unlock(&address_handler_list_lock);
+	scoped_guard(spinlock, &address_handler_list_lock)
+		list_del_rcu(&handler->link);
+
 	synchronize_rcu();
 }
 EXPORT_SYMBOL(fw_core_remove_address_handler);
-- 
2.43.0