linux-kernel - [PATCH 8/8] firewire: core: record card index in bus_reset

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Message-ID: <20240613131440.431766-9-o-takashi@sakamocchi.jp>
Date: Thu, 13 Jun 2024 22:14:40 +0900
From: Takashi Sakamoto <o-takashi@...amocchi.jp>
To: linux1394-devel@...ts.sourceforge.net
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 8/8] firewire: core: record card index in bus_reset_handle tracepoints event

The bus reset event occurs in the bus managed by one of 1394 OHCI
controller in Linu system, however the existing tracepoints events has
the lack of data about it to distinguish the issued hardware from the
others.

This commit adds card_index member into event structure to store the index
of host controller in use, and prints it.

Signed-off-by: Takashi Sakamoto <o-takashi@...amocchi.jp>
---
 drivers/firewire/core-topology.c | 2 +-
 include/trace/events/firewire.h  | 9 ++++++---
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/firewire/core-topology.c b/drivers/firewire/core-topology.c
index 837cc44d8d9f..8107eebd4296 100644
--- a/drivers/firewire/core-topology.c
+++ b/drivers/firewire/core-topology.c
@@ -508,7 +508,7 @@ void fw_core_handle_bus_reset(struct fw_card *card, int node_id, int generation,
 	struct fw_node *local_node;
 	unsigned long flags;
 
-	trace_bus_reset_handle(generation, node_id, bm_abdicate, self_ids, self_id_count);
+	trace_bus_reset_handle(card->index, generation, node_id, bm_abdicate, self_ids, self_id_count);
 
 	spin_lock_irqsave(&card->lock, flags);
 
diff --git a/include/trace/events/firewire.h b/include/trace/events/firewire.h
index e6485051f546..5ccc0d91b220 100644
--- a/include/trace/events/firewire.h
+++ b/include/trace/events/firewire.h
@@ -339,22 +339,25 @@ DEFINE_EVENT(bus_reset_arrange_template, bus_reset_postpone,
 );
 
 TRACE_EVENT(bus_reset_handle,
-	TP_PROTO(unsigned int generation, unsigned int node_id, bool bm_abdicate, u32 *self_ids, unsigned int self_id_count),
-	TP_ARGS(generation, node_id, bm_abdicate, self_ids, self_id_count),
+	TP_PROTO(unsigned int card_index, unsigned int generation, unsigned int node_id, bool bm_abdicate, u32 *self_ids, unsigned int self_id_count),
+	TP_ARGS(card_index, generation, node_id, bm_abdicate, self_ids, self_id_count),
 	TP_STRUCT__entry(
+		__field(u8, card_index)
 		__field(u8, generation)
 		__field(u8, node_id)
 		__field(bool, bm_abdicate)
 		__dynamic_array(u32, self_ids, self_id_count)
 	),
 	TP_fast_assign(
+		__entry->card_index = card_index;
 		__entry->generation = generation;
 		__entry->node_id = node_id;
 		__entry->bm_abdicate = bm_abdicate;
 		memcpy(__get_dynamic_array(self_ids), self_ids, __get_dynamic_array_len(self_ids));
 	),
 	TP_printk(
-		"generation=%u node_id=0x%04x bm_abdicate=%s self_ids=%s",
+		"card_index=%u generation=%u node_id=0x%04x bm_abdicate=%s self_ids=%s",
+		__entry->card_index,
 		__entry->generation,
 		__entry->node_id,
 		__entry->bm_abdicate ? "true" : "false",
-- 
2.43.0