linux-kernel - [PATCH] firewire: Convert timers to use timer

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Message-ID: <20171005005343.GA23824@beast>
Date:   Wed, 4 Oct 2017 17:53:43 -0700
From:   Kees Cook <keescook@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Stefan Richter <stefanr@...6.in-berlin.de>,
        linux1394-devel@...ts.sourceforge.net,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH] firewire: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: Stefan Richter <stefanr@...6.in-berlin.de>
Cc: linux1394-devel@...ts.sourceforge.net
Cc: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
This requires commit 686fef928bba ("timer: Prepare to change timer
callback argument type") in v4.14-rc3, but should be otherwise
stand-alone.
---
 drivers/firewire/core-transaction.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c
index d6a09b9cd8cc..6c4994487d49 100644
--- a/drivers/firewire/core-transaction.c
+++ b/drivers/firewire/core-transaction.c
@@ -137,9 +137,10 @@ int fw_cancel_transaction(struct fw_card *card,
 }
 EXPORT_SYMBOL(fw_cancel_transaction);
 
-static void split_transaction_timeout_callback(unsigned long data)
+static void split_transaction_timeout_callback(struct timer_list *timer)
 {
-	struct fw_transaction *t = (struct fw_transaction *)data;
+	struct fw_transaction *t = from_timer(t, timer,
+						   split_timeout_timer);
 	struct fw_card *card = t->card;
 	unsigned long flags;
 
@@ -373,8 +374,8 @@ void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode,
 	t->tlabel = tlabel;
 	t->card = card;
 	t->is_split_transaction = false;
-	setup_timer(&t->split_timeout_timer,
-		    split_transaction_timeout_callback, (unsigned long)t);
+	timer_setup(&t->split_timeout_timer,
+		    split_transaction_timeout_callback, 0);
 	t->callback = callback;
 	t->callback_data = callback_data;
 
-- 
2.7.4


-- 
Kees Cook
Pixel Security