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

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Date:   Tue, 24 Oct 2017 08:23:03 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Hans Verkuil <hverkuil@...all.nl>,
        "David S. Miller" <davem@...emloft.net>,
        Johannes Berg <johannes.berg@...el.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] media: radio: 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: Hans Verkuil <hverkuil@...all.nl>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Johannes Berg <johannes.berg@...el.com>
Cc: linux-media@...r.kernel.org
Signed-off-by: Kees Cook <keescook@...omium.org>
---
 drivers/media/radio/radio-cadet.c         | 7 +++----
 drivers/media/radio/wl128x/fmdrv_common.c | 7 +++----
 2 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/media/radio/radio-cadet.c b/drivers/media/radio/radio-cadet.c
index 6888b7db449d..7575e5370a49 100644
--- a/drivers/media/radio/radio-cadet.c
+++ b/drivers/media/radio/radio-cadet.c
@@ -281,9 +281,9 @@ static bool cadet_has_rds_data(struct cadet *dev)
 }
 
 
-static void cadet_handler(unsigned long data)
+static void cadet_handler(struct timer_list *t)
 {
-	struct cadet *dev = (void *)data;
+	struct cadet *dev = from_timer(dev, t, readtimer);
 
 	/* Service the RDS fifo */
 	if (mutex_trylock(&dev->lock)) {
@@ -309,7 +309,6 @@ static void cadet_handler(unsigned long data)
 	/*
 	 * Clean up and exit
 	 */
-	setup_timer(&dev->readtimer, cadet_handler, data);
 	dev->readtimer.expires = jiffies + msecs_to_jiffies(50);
 	add_timer(&dev->readtimer);
 }
@@ -318,7 +317,7 @@ static void cadet_start_rds(struct cadet *dev)
 {
 	dev->rdsstat = 1;
 	outb(0x80, dev->io);        /* Select RDS fifo */
-	setup_timer(&dev->readtimer, cadet_handler, (unsigned long)dev);
+	timer_setup(&dev->readtimer, cadet_handler, 0);
 	dev->readtimer.expires = jiffies + msecs_to_jiffies(50);
 	add_timer(&dev->readtimer);
 }
diff --git a/drivers/media/radio/wl128x/fmdrv_common.c b/drivers/media/radio/wl128x/fmdrv_common.c
index ab3428bf63fe..800d69c3f80b 100644
--- a/drivers/media/radio/wl128x/fmdrv_common.c
+++ b/drivers/media/radio/wl128x/fmdrv_common.c
@@ -543,13 +543,13 @@ static inline void fm_irq_common_cmd_resp_helper(struct fmdev *fmdev, u8 stage)
  * interrupt process. Therefore reset stage index to re-enable default
  * interrupts. So that next interrupt will be processed as usual.
  */
-static void int_timeout_handler(unsigned long data)
+static void int_timeout_handler(struct timer_list *t)
 {
 	struct fmdev *fmdev;
 	struct fm_irq *fmirq;
 
 	fmdbg("irq: timeout,trying to re-enable fm interrupts\n");
-	fmdev = (struct fmdev *)data;
+	fmdev = from_timer(fmdev, t, irq_info.timer);
 	fmirq = &fmdev->irq_info;
 	fmirq->retry++;
 
@@ -1550,8 +1550,7 @@ int fmc_prepare(struct fmdev *fmdev)
 	atomic_set(&fmdev->tx_cnt, 1);
 	fmdev->resp_comp = NULL;
 
-	setup_timer(&fmdev->irq_info.timer, &int_timeout_handler,
-		    (unsigned long)fmdev);
+	timer_setup(&fmdev->irq_info.timer, int_timeout_handler, 0);
 	/*TODO: add FM_STIC_EVENT later */
 	fmdev->irq_info.mask = FM_MAL_EVENT;
 
-- 
2.7.4


-- 
Kees Cook
Pixel Security