linux-kernel - [PATCH v2 1/6] firewire: core: remove useless generation check

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Message-ID: <20250918235448.129705-2-o-takashi@sakamocchi.jp>
Date: Fri, 19 Sep 2025 08:54:43 +0900
From: Takashi Sakamoto <o-takashi@...amocchi.jp>
To: linux1394-devel@...ts.sourceforge.net
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/6] firewire: core: remove useless generation check

Two functions, fw_core_handle_bus_reset() and bm_work(), are serialized
by a commit 3d91fd440cc7 ("firewire: core: disable bus management work
temporarily during updating topology"). Therefore the generation member
of fw_card is immutable in bm_work().

This commit removes useless generation check in bm_work().

Signed-off-by: Takashi Sakamoto <o-takashi@...amocchi.jp>
---
 drivers/firewire/core-card.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/firewire/core-card.c b/drivers/firewire/core-card.c
index 4fcd5ce4b2ce..ef00125fb01a 100644
--- a/drivers/firewire/core-card.c
+++ b/drivers/firewire/core-card.c
@@ -362,14 +362,12 @@ static void bm_work(struct work_struct *work)
 		if (rcode == RCODE_COMPLETE) {
 			int bm_id = be32_to_cpu(data[0]);
 
-			if (generation == card->generation) {
-				// Used by cdev layer for "struct fw_cdev_event_bus_reset".
-				scoped_guard(spinlock, &card->lock) {
-					if (bm_id != BUS_MANAGER_ID_NOT_REGISTERED)
-						card->bm_node_id = 0xffc0 & bm_id;
-					else
-						card->bm_node_id = local_id;
-				}
+			// Used by cdev layer for "struct fw_cdev_event_bus_reset".
+			scoped_guard(spinlock, &card->lock) {
+				if (bm_id != BUS_MANAGER_ID_NOT_REGISTERED)
+					card->bm_node_id = 0xffc0 & bm_id;
+				else
+					card->bm_node_id = local_id;
 			}
 
 			if (bm_id != BUS_MANAGER_ID_NOT_REGISTERED) {
-- 
2.48.1