scsi: sas: 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. This requires adding a pointer to
hold the timer's target task, as there isn't a link back from slow_task.

Cc: John Garry <[e-mail]>
Cc: "James E.J. Bottomley" <[e-mail]>
Cc: "Martin K. Petersen" <[e-mail]>
Cc: Jack Wang <[e-mail]>
Cc: [e-mail]
Cc: Jens Axboe <[e-mail]>
Cc: Hannes Reinecke <[e-mail]>
Cc: Johannes Thumshirn <[e-mail]>
Cc: Benjamin Block <[e-mail]>
Cc: Baoyou Xie <[e-mail]>
Cc: Wei Yongjun <[e-mail]>
Cc: [e-mail]
Signed-off-by: Kees Cook <[e-mail]>
Reviewed-by: Martin K. Petersen <[e-mail]>
Acked-by: John Garry <[e-mail]> # for hisi_sas part
Tested-by: John Garry <[e-mail]> # basic sanity test for hisi_sas
Reviewed-by: Jack Wang <[e-mail]>

drivers/scsi/hisi_sas/hisi_sas.h

···
 	struct hisi_sas_port	*port;
 	struct asd_sas_phy	sas_phy;
 	struct sas_identify	identify;
-	struct timer_list	timer;
 	struct work_struct	phyup_ws;
 	u64		port_id; /* from hw */
 	u64		dev_sas_addr;

drivers/scsi/hisi_sas/hisi_sas_main.c

···
 
 	phy->hisi_hba = hisi_hba;
 	phy->port = NULL;
-	init_timer(&phy->timer);
 	sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
 	sas_phy->class = SAS;
 	sas_phy->iproto = SAS_PROTOCOL_ALL;
···
 	complete(&task->slow_task->completion);
 }
 
-static void hisi_sas_tmf_timedout(unsigned long data)
+static void hisi_sas_tmf_timedout(struct timer_list *t)
 {
-	struct sas_task *task = (struct sas_task *)data;
+	struct sas_task_slow *slow = from_timer(slow, t, timer);
+	struct sas_task *task = slow->task;
 	unsigned long flags;
 
 	spin_lock_irqsave(&task->task_state_lock, flags);
···
 		}
 		task->task_done = hisi_sas_task_done;
 
-		task->slow_task->timer.data = (unsigned long) task;
-		task->slow_task->timer.function = hisi_sas_tmf_timedout;
+		task->slow_task->timer.function = (TIMER_FUNC_TYPE)hisi_sas_tmf_timedout;
 		task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
 		add_timer(&task->slow_task->timer);
 
···
 	task->dev = device;
 	task->task_proto = device->tproto;
 	task->task_done = hisi_sas_task_done;
-	task->slow_task->timer.data = (unsigned long)task;
-	task->slow_task->timer.function = hisi_sas_tmf_timedout;
+	task->slow_task->timer.function = (TIMER_FUNC_TYPE)hisi_sas_tmf_timedout;
 	task->slow_task->timer.expires = jiffies + msecs_to_jiffies(110);
 	add_timer(&task->slow_task->timer);
 
···
 	hisi_hba->shost = shost;
 	SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
 
-	init_timer(&hisi_hba->timer);
+	timer_setup(&hisi_hba->timer, NULL, 0);
 
 	if (hisi_sas_get_fw_info(hisi_hba) < 0)
 		goto err_out;

drivers/scsi/hisi_sas/hisi_sas_v1_hw.c

···
 	start_phy_v1_hw(hisi_hba, phy_no);
 }
 
-static void start_phys_v1_hw(unsigned long data)
+static void start_phys_v1_hw(struct timer_list *t)
 {
-	struct hisi_hba *hisi_hba = (struct hisi_hba *)data;
+	struct hisi_hba *hisi_hba = from_timer(hisi_hba, t, timer);
 	int i;
 
 	for (i = 0; i < hisi_hba->n_phy; i++) {
···
 		hisi_sas_phy_read32(hisi_hba, i, CHL_INT2_MSK);
 	}
 
-	setup_timer(timer, start_phys_v1_hw, (unsigned long)hisi_hba);
+	timer_setup(timer, start_phys_v1_hw, 0);
 	mod_timer(timer, jiffies + HZ);
 }
 

drivers/scsi/hisi_sas/hisi_sas_v2_hw.c

···
 #define ERR_ON_RX_PHASE(err_phase) (err_phase == 0x10 || \
 		err_phase == 0x20 || err_phase == 0x40)
 
-static void link_timeout_disable_link(unsigned long data);
+static void link_timeout_disable_link(struct timer_list *t);
 
 static u32 hisi_sas_read32(struct hisi_hba *hisi_hba, u32 off)
 {
···
 			 upper_32_bits(hisi_hba->initial_fis_dma));
 }
 
-static void link_timeout_enable_link(unsigned long data)
+static void link_timeout_enable_link(struct timer_list *t)
 {
-	struct hisi_hba *hisi_hba = (struct hisi_hba *)data;
+	struct hisi_hba *hisi_hba = from_timer(hisi_hba, t, timer);
 	int i, reg_val;
 
 	for (i = 0; i < hisi_hba->n_phy; i++) {
···
 		}
 	}
 
-	hisi_hba->timer.function = link_timeout_disable_link;
+	hisi_hba->timer.function = (TIMER_FUNC_TYPE)link_timeout_disable_link;
 	mod_timer(&hisi_hba->timer, jiffies + msecs_to_jiffies(900));
 }
 
-static void link_timeout_disable_link(unsigned long data)
+static void link_timeout_disable_link(struct timer_list *t)
 {
-	struct hisi_hba *hisi_hba = (struct hisi_hba *)data;
+	struct hisi_hba *hisi_hba = from_timer(hisi_hba, t, timer);
 	int i, reg_val;
 
 	reg_val = hisi_sas_read32(hisi_hba, PHY_STATE);
···
 		}
 	}
 
-	hisi_hba->timer.function = link_timeout_enable_link;
+	hisi_hba->timer.function = (TIMER_FUNC_TYPE)link_timeout_enable_link;
 	mod_timer(&hisi_hba->timer, jiffies + msecs_to_jiffies(100));
 }
 
 static void set_link_timer_quirk(struct hisi_hba *hisi_hba)
 {
-	hisi_hba->timer.data = (unsigned long)hisi_hba;
-	hisi_hba->timer.function = link_timeout_disable_link;
+	hisi_hba->timer.function = (TIMER_FUNC_TYPE)link_timeout_disable_link;
 	hisi_hba->timer.expires = jiffies + msecs_to_jiffies(1000);
 	add_timer(&hisi_hba->timer);
 }
···
 	return 0;
 }
 
-static void hisi_sas_internal_abort_quirk_timeout(unsigned long data)
+static void hisi_sas_internal_abort_quirk_timeout(struct timer_list *t)
 {
-	struct hisi_sas_slot *slot = (struct hisi_sas_slot *)data;
+	struct hisi_sas_slot *slot = from_timer(slot, t, internal_abort_timer);
 	struct hisi_sas_port *port = slot->port;
 	struct asd_sas_port *asd_sas_port;
 	struct asd_sas_phy *sas_phy;
···
 	struct timer_list *timer = &slot->internal_abort_timer;
 
 	/* setup the quirk timer */
-	setup_timer(timer, hisi_sas_internal_abort_quirk_timeout,
-		    (unsigned long)slot);
+	timer_setup(timer, hisi_sas_internal_abort_quirk_timeout, 0);
 	/* Set the timeout to 10ms less than internal abort timeout */
 	mod_timer(timer, jiffies + msecs_to_jiffies(100));
 

drivers/scsi/hisi_sas/hisi_sas_v3_hw.c

···
 	hisi_hba->shost = shost;
 	SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
 
-	init_timer(&hisi_hba->timer);
+	timer_setup(&hisi_hba->timer, NULL, 0);
 
 	if (hisi_sas_get_fw_info(hisi_hba) < 0)
 		goto err_out;

drivers/scsi/libsas/sas_expander.c

···
 
 /* ---------- SMP task management ---------- */
 
-static void smp_task_timedout(unsigned long _task)
+static void smp_task_timedout(struct timer_list *t)
 {
-	struct sas_task *task = (void *) _task;
+	struct sas_task_slow *slow = from_timer(slow, t, timer);
+	struct sas_task *task = slow->task;
 	unsigned long flags;
 
 	spin_lock_irqsave(&task->task_state_lock, flags);
···
 
 		task->task_done = smp_task_done;
 
-		task->slow_task->timer.data = (unsigned long) task;
-		task->slow_task->timer.function = smp_task_timedout;
+		task->slow_task->timer.function = (TIMER_FUNC_TYPE)smp_task_timedout;
 		task->slow_task->timer.expires = jiffies + SMP_TIMEOUT*HZ;
 		add_timer(&task->slow_task->timer);
 

drivers/scsi/libsas/sas_init.c

···
 	}
 
 	task->slow_task = slow;
-	init_timer(&slow->timer);
+	slow->task = task;
+	timer_setup(&slow->timer, NULL, 0);
 	init_completion(&slow->completion);
 
 	return task;

drivers/scsi/libsas/sas_scsi_host.c

···
 			return;
 		if (!del_timer(&slow->timer))
 			return;
-		slow->timer.function(slow->timer.data);
+		slow->timer.function((TIMER_DATA_TYPE)&slow->timer);
 		return;
 	}
 

drivers/scsi/mvsas/mv_init.c

···
 
 	phy->mvi = mvi;
 	phy->port = NULL;
-	init_timer(&phy->timer);
+	timer_setup(&phy->timer, NULL, 0);
 	sas_phy->enabled = (phy_id < mvi->chip->n_phy) ? 1 : 0;
 	sas_phy->class = SAS;
 	sas_phy->iproto = SAS_PROTOCOL_ALL;
···
 		mvi->devices[i].dev_type = SAS_PHY_UNUSED;
 		mvi->devices[i].device_id = i;
 		mvi->devices[i].dev_status = MVS_DEV_NORMAL;
-		init_timer(&mvi->devices[i].timer);
 	}
 
 	/*

drivers/scsi/mvsas/mv_sas.c

···
 	complete(&task->slow_task->completion);
 }
 
-static void mvs_tmf_timedout(unsigned long data)
+static void mvs_tmf_timedout(struct timer_list *t)
 {
-	struct sas_task *task = (struct sas_task *)data;
+	struct sas_task_slow *slow = from_timer(slow, t, timer);
+	struct sas_task *task = slow->task;
 
 	task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 	complete(&task->slow_task->completion);
···
 		memcpy(&task->ssp_task, parameter, para_len);
 		task->task_done = mvs_task_done;
 
-		task->slow_task->timer.data = (unsigned long) task;
-		task->slow_task->timer.function = mvs_tmf_timedout;
+		task->slow_task->timer.function = (TIMER_FUNC_TYPE)mvs_tmf_timedout;
 		task->slow_task->timer.expires = jiffies + MVS_TASK_TIMEOUT*HZ;
 		add_timer(&task->slow_task->timer);
 
···
 	return ret;
 }
 
-static void mvs_sig_time_out(unsigned long tphy)
+static void mvs_sig_time_out(struct timer_list *t)
 {
-	struct mvs_phy *phy = (struct mvs_phy *)tphy;
+	struct mvs_phy *phy = from_timer(phy, t, timer);
 	struct mvs_info *mvi = phy->mvi;
 	u8 phy_no;
 
···
 		MVS_CHIP_DISP->write_port_irq_mask(mvi, phy_no,
 					tmp | PHYEV_SIG_FIS);
 		if (phy->timer.function == NULL) {
-			phy->timer.data = (unsigned long)phy;
-			phy->timer.function = mvs_sig_time_out;
+			phy->timer.function = (TIMER_FUNC_TYPE)mvs_sig_time_out;
 			phy->timer.expires = jiffies + 5*HZ;
 			add_timer(&phy->timer);
 		}

drivers/scsi/mvsas/mv_sas.h

···
 	enum sas_device_type dev_type;
 	struct mvs_info *mvi_info;
 	struct domain_device *sas_device;
-	struct timer_list timer;
 	u32 attached_phy;
 	u32 device_id;
 	u32 running_req;

drivers/scsi/pm8001/pm8001_sas.c

···
 	complete(&task->slow_task->completion);
 }
 
-static void pm8001_tmf_timedout(unsigned long data)
+static void pm8001_tmf_timedout(struct timer_list *t)
 {
-	struct sas_task *task = (struct sas_task *)data;
+	struct sas_task_slow *slow = from_timer(slow, t, timer);
+	struct sas_task *task = slow->task;
 
 	task->task_state_flags |= SAS_TASK_STATE_ABORTED;
 	complete(&task->slow_task->completion);
···
 		task->task_proto = dev->tproto;
 		memcpy(&task->ssp_task, parameter, para_len);
 		task->task_done = pm8001_task_done;
-		task->slow_task->timer.data = (unsigned long)task;
-		task->slow_task->timer.function = pm8001_tmf_timedout;
+		task->slow_task->timer.function = (TIMER_FUNC_TYPE)pm8001_tmf_timedout;
 		task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
 		add_timer(&task->slow_task->timer);
 
···
 		task->dev = dev;
 		task->task_proto = dev->tproto;
 		task->task_done = pm8001_task_done;
-		task->slow_task->timer.data = (unsigned long)task;
-		task->slow_task->timer.function = pm8001_tmf_timedout;
+		task->slow_task->timer.function = (TIMER_FUNC_TYPE)pm8001_tmf_timedout;
 		task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
 		add_timer(&task->slow_task->timer);
 

include/scsi/libsas.h

···
 	 */
 	struct timer_list     timer;
 	struct completion     completion;
+	struct sas_task       *task;
 };
 
 #define SAS_TASK_STATE_PENDING      1