From 3ecb30703a1ebe5f92785cbe5228707959067bd7 Mon Sep 17 00:00:00 2001
From: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Date: Mon, 1 Jan 2018 09:50:01 +0200
Subject: [PATCH] fix building with 4.15: init_timer / setup_timer

Kernel 4.15 revised the interface for callbacks to timers. For that the
initialization of timers has changed.

Changes are conditioned on the preprocesson define init_timer that was
removed.

DAHLIN-359 #close

Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
---
 drivers/dahdi/dahdi-base.c          | 11 ++++++++---
 drivers/dahdi/dahdi_dynamic.c       | 13 ++++++++-----
 drivers/dahdi/dahdi_dynamic_ethmf.c | 11 ++++++++---
 drivers/dahdi/wctc4xxp/base.c       |  8 +++++++-
 drivers/dahdi/wcte12xp/base.c       |  9 ++++++++-
 drivers/dahdi/wcte13xp-base.c       |  8 +++++++-
 drivers/dahdi/wcte43x-base.c        |  8 +++++++-
 drivers/dahdi/xpp/xbus-core.c       | 13 ++++++++++---
 include/dahdi/kernel.h              | 10 ++++++++++
 9 files changed, 73 insertions(+), 18 deletions(-)

diff --git a/drivers/dahdi/dahdi-base.c b/drivers/dahdi/dahdi-base.c
index 618754d..c473474 100644
--- a/drivers/dahdi/dahdi-base.c
+++ b/drivers/dahdi/dahdi-base.c
@@ -10069,7 +10069,13 @@ static inline unsigned long msecs_processed(const struct core_timer *const ct)
 	return atomic_read(&ct->count) * DAHDI_MSECS_PER_CHUNK;
 }
 
-static void coretimer_func(unsigned long param)
+static void coretimer_func(
+#ifdef init_timer	/* Compatibility for pre 4.15 interface */
+		unsigned long param
+#else
+		struct timer_list *t
+#endif
+)
 {
 	unsigned long flags;
 	unsigned long ms_since_start;
@@ -10150,8 +10156,7 @@ static void coretimer_func(unsigned long param)
 
 static void coretimer_init(void)
 {
-	init_timer(&core_timer.timer);
-	core_timer.timer.function = coretimer_func;
+	timer_setup(&core_timer.timer, coretimer_func, 0);
 	ktime_get_ts(&core_timer.start_interval);
 	atomic_set(&core_timer.count, 0);
 	atomic_set(&core_timer.shutdown, 0);
diff --git a/drivers/dahdi/dahdi_dynamic.c b/drivers/dahdi/dahdi_dynamic.c
index 0a37e2a..6727bd4 100644
--- a/drivers/dahdi/dahdi_dynamic.c
+++ b/drivers/dahdi/dahdi_dynamic.c
@@ -831,7 +831,13 @@ EXPORT_SYMBOL(dahdi_dynamic_unregister_driver);
 
 static struct timer_list alarmcheck;
 
-static void check_for_red_alarm(unsigned long ignored)
+static void check_for_red_alarm(
+#ifdef init_timer	/* Compatibility for pre 4.15 interface */
+		unsigned long ignored
+#else
+		struct timer_list *ignored
+#endif
+)
 {
 	int newalarm;
 	int alarmchanged = 0;
@@ -867,10 +873,7 @@ static const struct dahdi_dynamic_ops dahdi_dynamic_ops = {
 static int dahdi_dynamic_init(void)
 {
 	/* Start process to check for RED ALARM */
-	init_timer(&alarmcheck);
-	alarmcheck.expires = 0;
-	alarmcheck.data = 0;
-	alarmcheck.function = check_for_red_alarm;
+	timer_setup(&alarmcheck, check_for_red_alarm, 0);
 	/* Check once per second */
 	mod_timer(&alarmcheck, jiffies + 1 * HZ);
 #ifdef ENABLE_TASKLETS
diff --git a/drivers/dahdi/dahdi_dynamic_ethmf.c b/drivers/dahdi/dahdi_dynamic_ethmf.c
index dec368b..4d7d2f1 100644
--- a/drivers/dahdi/dahdi_dynamic_ethmf.c
+++ b/drivers/dahdi/dahdi_dynamic_ethmf.c
@@ -681,7 +681,13 @@ static int ethmf_delay_dec(void)
  * Timer callback function to allow all spans to be added, prior to any of
  * them being used.
  */
-static void timer_callback(unsigned long param)
+static void timer_callback(
+#ifdef init_timer	/* Compatibility for pre 4.15 interface */
+		unsigned long ignored
+#else
+		struct timer_list *ignored
+#endif
+)
 {
 	if (ethmf_delay_dec()) {
 		if (!atomic_read(&timer_deleted)) {
@@ -764,9 +770,8 @@ static const struct file_operations ztdethmf_proc_fops = {
 
 static int __init ztdethmf_init(void)
 {
-	init_timer(&timer);
+	timer_setup(&timer, &timer_callback, 0);
 	timer.expires = jiffies + HZ;
-	timer.function = &timer_callback;
 	if (!timer_pending(&timer))
 		add_timer(&timer);
 
diff --git a/drivers/dahdi/wctc4xxp/base.c b/drivers/dahdi/wctc4xxp/base.c
index 0d76d6a..8e0b76b 100644
--- a/drivers/dahdi/wctc4xxp/base.c
+++ b/drivers/dahdi/wctc4xxp/base.c
@@ -3701,9 +3701,15 @@ wctc4xxp_send_commands(struct wcdte *wc, struct list_head *to_send)
 }
 
 static void
+#ifndef init_timer
+wctc4xxp_watchdog(struct timer_list *t)
+{
+	struct wcdte *wc = from_timer(wc, t, watchdog);
+#else	/* Compatibility for pre 4.15 interface */
 wctc4xxp_watchdog(unsigned long data)
 {
 	struct wcdte *wc = (struct wcdte *)data;
+#endif
 	struct tcb *cmd, *temp;
 	LIST_HEAD(cmds_to_retry);
 	const int MAX_RETRIES = 5;
@@ -4095,7 +4101,7 @@ wctc4xxp_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	wc->watchdog.data = (unsigned long)wc;
 	init_timer(&wc->watchdog);
 #	else
-	setup_timer(&wc->watchdog, wctc4xxp_watchdog, (unsigned long)wc);
+	timer_setup(&wc->watchdog, wctc4xxp_watchdog, 0);
 #	endif
 
 	/* ------------------------------------------------------------------
diff --git a/drivers/dahdi/wcte12xp/base.c b/drivers/dahdi/wcte12xp/base.c
index c327c5f..77e2d2f 100644
--- a/drivers/dahdi/wcte12xp/base.c
+++ b/drivers/dahdi/wcte12xp/base.c
@@ -2765,10 +2765,17 @@ static void vpm_check_func(struct work_struct *work)
 	return;
 }
 
+#ifndef init_timer
+static void te12xp_timer(struct timer_list *t)
+{
+	unsigned long flags;
+	struct t1 *wc = from_timer(wc, t, timer);
+#else	/* Compatibility for pre 4.15 interface */
 static void te12xp_timer(unsigned long data)
 {
 	unsigned long flags;
 	struct t1 *wc = (struct t1 *)data;
+#endif
 
 	if (unlikely(!test_bit(INITIALIZED, &wc->bit_flags)))
 		return;
@@ -2943,7 +2950,7 @@ static int __devinit te12xp_init_one(struct pci_dev *pdev, const struct pci_devi
 	spin_lock_init(&wc->reglock);
 	INIT_LIST_HEAD(&wc->active_cmds);
 	INIT_LIST_HEAD(&wc->pending_cmds);
-	setup_timer(&wc->timer, te12xp_timer, (unsigned long)wc);
+	timer_setup(&wc->timer, te12xp_timer, 0);
 
 #	if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
 	INIT_WORK(&wc->timer_work, timer_work_func, wc);
diff --git a/drivers/dahdi/wcte13xp-base.c b/drivers/dahdi/wcte13xp-base.c
index c5ebe9d..57e6dac 100644
--- a/drivers/dahdi/wcte13xp-base.c
+++ b/drivers/dahdi/wcte13xp-base.c
@@ -2381,9 +2381,15 @@ static void te13x_handle_interrupt(struct wcxb *xb, u32 pending)
 	}
 }
 
+#ifndef init_timer
+static void te13xp_timer(struct timer_list *t)
+{
+	struct t13x *wc = from_timer(wc, t, timer);
+#else	/* Compatibility for pre 4.15 interface */
 static void te13xp_timer(unsigned long data)
 {
 	struct t13x *wc = (struct t13x *)data;
+#endif
 
 	if (unlikely(!test_bit(INITIALIZED, &wc->bit_flags)))
 		return;
@@ -2582,7 +2588,7 @@ static int __devinit te13xp_init_one(struct pci_dev *pdev,
 	wc->ledstate = -1;
 	spin_lock_init(&wc->reglock);
 	mutex_init(&wc->lock);
-	setup_timer(&wc->timer, te13xp_timer, (unsigned long)wc);
+	timer_setup(&wc->timer, te13xp_timer, 0);
 
 #	if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
 	INIT_WORK(&wc->timer_work, timer_work_func, wc);
diff --git a/drivers/dahdi/wcte43x-base.c b/drivers/dahdi/wcte43x-base.c
index 3e6159b..af39165 100644
--- a/drivers/dahdi/wcte43x-base.c
+++ b/drivers/dahdi/wcte43x-base.c
@@ -3203,9 +3203,15 @@ static void t43x_handle_interrupt(struct wcxb *xb, u32 pending)
 		wc->intr_span = 0;
 }
 
+#ifndef init_timer
+static void t43x_timer(struct timer_list *t)
+{
+	struct t43x *wc = from_timer(wc, t, timer);
+#else	/* Compatibility for pre 4.15 interface */
 static void t43x_timer(unsigned long data)
 {
 	struct t43x *wc = (struct t43x *)data;
+#endif
 
 	if (!is_initialized(wc))
 		return;
@@ -3431,7 +3437,7 @@ static int __devinit t43x_init_one(struct pci_dev *pdev,
 		goto fail_exit;
 
 	mutex_init(&wc->lock);
-	setup_timer(&wc->timer, t43x_timer, (unsigned long)wc);
+	timer_setup(&wc->timer, t43x_timer, 0);
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
 	INIT_WORK(&wc->timer_work, timer_work_func, wc);
diff --git a/drivers/dahdi/xpp/xbus-core.c b/drivers/dahdi/xpp/xbus-core.c
index ca129cd..f9aa754 100644
--- a/drivers/dahdi/xpp/xbus-core.c
+++ b/drivers/dahdi/xpp/xbus-core.c
@@ -1350,9 +1350,15 @@ err:
 	return 0;
 }
 
+#ifndef init_timer
+static void xbus_command_timer(struct timer_list *t)
+{
+	xbus_t *xbus = from_timer(xbus, t, command_timer);
+#else
 static void xbus_command_timer(unsigned long param)
 {
 	xbus_t *xbus = (xbus_t *)param;
+#endif
 	struct timeval now;
 
 	BUG_ON(!xbus);
@@ -1368,8 +1374,6 @@ void xbus_set_command_timer(xbus_t *xbus, bool on)
 	if (on) {
 		if (!timer_pending(&xbus->command_timer)) {
 			XBUS_DBG(SYNC, xbus, "add_timer\n");
-			xbus->command_timer.function = xbus_command_timer;
-			xbus->command_timer.data = (unsigned long)xbus;
 			xbus->command_timer.expires = jiffies + 1;
 			add_timer(&xbus->command_timer);
 		}
@@ -1642,7 +1646,10 @@ xbus_t *xbus_new(struct xbus_ops *ops, ushort max_send_size,
 	transport_init(xbus, ops, max_send_size, transport_device, priv);
 	spin_lock_init(&xbus->lock);
 	init_waitqueue_head(&xbus->command_queue_empty);
-	init_timer(&xbus->command_timer);
+	timer_setup(&xbus->command_timer, xbus_command_timer, 0);
+#ifdef init_timer
+	xbus->command_timer.data = (unsigned long)xbus;
+#endif
 	atomic_set(&xbus->pcm_rx_counter, 0);
 	xbus->min_tx_sync = INT_MAX;
 	xbus->min_rx_sync = INT_MAX;
diff --git a/include/dahdi/kernel.h b/include/dahdi/kernel.h
index c946fa3..bc07ef6 100644
--- a/include/dahdi/kernel.h
+++ b/include/dahdi/kernel.h
@@ -1630,6 +1630,16 @@ struct mutex {
 	printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
 #endif
 
+
+#ifdef init_timer	/* Compatibility for pre 4.15 interface */
+#define timer_setup(timer, func, flags) 	\
+	do { 					\
+		init_timer(timer); 		\
+		(timer)->function = (func);	\
+	} while (0)
+#endif
+
+
 /* If KBUILD_MODNAME is not defined in a compilation unit, then the dev_dbg
  * macro will not work properly. */
 #ifndef KBUILD_MODNAME
-- 
2.11.0