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Date: Mon, 20 Jan 2020 20:22:32 +0800
From: John Garry <john.garry@...wei.com>
To: <jejb@...ux.vnet.ibm.com>, <martin.petersen@...cle.com>
CC: <linux-scsi@...r.kernel.org>, <linuxarm@...wei.com>,
<linux-kernel@...r.kernel.org>,
Xiang Chen <chenxiang66@...ilicon.com>,
"John Garry" <john.garry@...wei.com>
Subject: [PATCH 2/7] scsi: hisi_sas: replace spin_lock_irqsave/spin_unlock_restore with spin_lock/spin_unlock
From: Xiang Chen <chenxiang66@...ilicon.com>
After changed tasklet to workqueue or threaded irq, some critical
resources are only used on threads (not in interrupt or bottom half of
interrupt), so replace spin_lock_irqsave/spin_unlock_restore with
spin_lock/spin_unlock to protect those critical resources.
Signed-off-by: Xiang Chen <chenxiang66@...ilicon.com>
Signed-off-by: John Garry <john.garry@...wei.com>
---
drivers/scsi/hisi_sas/hisi_sas_main.c | 48 +++++++++++---------------
drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 12 +++----
2 files changed, 26 insertions(+), 34 deletions(-)
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index c653cce2644a..3e103e86e964 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -163,13 +163,11 @@ static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
{
- unsigned long flags;
-
if (hisi_hba->hw->slot_index_alloc ||
slot_idx >= HISI_SAS_UNRESERVED_IPTT) {
- spin_lock_irqsave(&hisi_hba->lock, flags);
+ spin_lock(&hisi_hba->lock);
hisi_sas_slot_index_clear(hisi_hba, slot_idx);
- spin_unlock_irqrestore(&hisi_hba->lock, flags);
+ spin_unlock(&hisi_hba->lock);
}
}
@@ -185,12 +183,11 @@ static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
{
int index;
void *bitmap = hisi_hba->slot_index_tags;
- unsigned long flags;
if (scsi_cmnd)
return scsi_cmnd->request->tag;
- spin_lock_irqsave(&hisi_hba->lock, flags);
+ spin_lock(&hisi_hba->lock);
index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
hisi_hba->last_slot_index + 1);
if (index >= hisi_hba->slot_index_count) {
@@ -198,13 +195,13 @@ static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
hisi_hba->slot_index_count,
HISI_SAS_UNRESERVED_IPTT);
if (index >= hisi_hba->slot_index_count) {
- spin_unlock_irqrestore(&hisi_hba->lock, flags);
+ spin_unlock(&hisi_hba->lock);
return -SAS_QUEUE_FULL;
}
}
hisi_sas_slot_index_set(hisi_hba, index);
hisi_hba->last_slot_index = index;
- spin_unlock_irqrestore(&hisi_hba->lock, flags);
+ spin_unlock(&hisi_hba->lock);
return index;
}
@@ -220,7 +217,6 @@ static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
struct hisi_sas_slot *slot)
{
- unsigned long flags;
int device_id = slot->device_id;
struct hisi_sas_device *sas_dev = &hisi_hba->devices[device_id];
@@ -247,9 +243,9 @@ void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
}
}
- spin_lock_irqsave(&sas_dev->lock, flags);
+ spin_lock(&sas_dev->lock);
list_del_init(&slot->entry);
- spin_unlock_irqrestore(&sas_dev->lock, flags);
+ spin_unlock(&sas_dev->lock);
memset(slot, 0, offsetof(struct hisi_sas_slot, buf));
@@ -489,14 +485,14 @@ static int hisi_sas_task_prep(struct sas_task *task,
slot_idx = rc;
slot = &hisi_hba->slot_info[slot_idx];
- spin_lock_irqsave(&dq->lock, flags);
+ spin_lock(&dq->lock);
wr_q_index = dq->wr_point;
dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
list_add_tail(&slot->delivery, &dq->list);
- spin_unlock_irqrestore(&dq->lock, flags);
- spin_lock_irqsave(&sas_dev->lock, flags);
+ spin_unlock(&dq->lock);
+ spin_lock(&sas_dev->lock);
list_add_tail(&slot->entry, &sas_dev->list);
- spin_unlock_irqrestore(&sas_dev->lock, flags);
+ spin_unlock(&sas_dev->lock);
dlvry_queue = dq->id;
dlvry_queue_slot = wr_q_index;
@@ -562,7 +558,6 @@ static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
{
u32 rc;
u32 pass = 0;
- unsigned long flags;
struct hisi_hba *hisi_hba;
struct device *dev;
struct domain_device *device = task->dev;
@@ -606,9 +601,9 @@ static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
dev_err(dev, "task exec: failed[%d]!\n", rc);
if (likely(pass)) {
- spin_lock_irqsave(&dq->lock, flags);
+ spin_lock(&dq->lock);
hisi_hba->hw->start_delivery(dq);
- spin_unlock_irqrestore(&dq->lock, flags);
+ spin_unlock(&dq->lock);
}
return rc;
@@ -659,12 +654,11 @@ static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
{
struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
struct hisi_sas_device *sas_dev = NULL;
- unsigned long flags;
int last = hisi_hba->last_dev_id;
int first = (hisi_hba->last_dev_id + 1) % HISI_SAS_MAX_DEVICES;
int i;
- spin_lock_irqsave(&hisi_hba->lock, flags);
+ spin_lock(&hisi_hba->lock);
for (i = first; i != last; i %= HISI_SAS_MAX_DEVICES) {
if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
int queue = i % hisi_hba->queue_count;
@@ -684,7 +678,7 @@ static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
i++;
}
hisi_hba->last_dev_id = i;
- spin_unlock_irqrestore(&hisi_hba->lock, flags);
+ spin_unlock(&hisi_hba->lock);
return sas_dev;
}
@@ -1965,14 +1959,14 @@ hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
slot_idx = rc;
slot = &hisi_hba->slot_info[slot_idx];
- spin_lock_irqsave(&dq->lock, flags);
+ spin_lock(&dq->lock);
wr_q_index = dq->wr_point;
dq->wr_point = (dq->wr_point + 1) % HISI_SAS_QUEUE_SLOTS;
list_add_tail(&slot->delivery, &dq->list);
- spin_unlock_irqrestore(&dq->lock, flags);
- spin_lock_irqsave(&sas_dev->lock, flags);
+ spin_unlock(&dq->lock);
+ spin_lock(&sas_dev->lock);
list_add_tail(&slot->entry, &sas_dev->list);
- spin_unlock_irqrestore(&sas_dev->lock, flags);
+ spin_unlock(&sas_dev->lock);
dlvry_queue = dq->id;
dlvry_queue_slot = wr_q_index;
@@ -2001,9 +1995,9 @@ hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
spin_unlock_irqrestore(&task->task_state_lock, flags);
WRITE_ONCE(slot->ready, 1);
/* send abort command to the chip */
- spin_lock_irqsave(&dq->lock, flags);
+ spin_lock(&dq->lock);
hisi_hba->hw->start_delivery(dq);
- spin_unlock_irqrestore(&dq->lock, flags);
+ spin_unlock(&dq->lock);
return 0;
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
index a0e05a118f2c..e05faf315dcd 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -773,7 +773,6 @@ slot_index_alloc_quirk_v2_hw(struct hisi_hba *hisi_hba,
struct hisi_sas_device *sas_dev = device->lldd_dev;
int sata_idx = sas_dev->sata_idx;
int start, end;
- unsigned long flags;
if (!sata_dev) {
/*
@@ -797,12 +796,12 @@ slot_index_alloc_quirk_v2_hw(struct hisi_hba *hisi_hba,
end = 64 * (sata_idx + 2);
}
- spin_lock_irqsave(&hisi_hba->lock, flags);
+ spin_lock(&hisi_hba->lock);
while (1) {
start = find_next_zero_bit(bitmap,
hisi_hba->slot_index_count, start);
if (start >= end) {
- spin_unlock_irqrestore(&hisi_hba->lock, flags);
+ spin_unlock(&hisi_hba->lock);
return -SAS_QUEUE_FULL;
}
/*
@@ -814,7 +813,7 @@ slot_index_alloc_quirk_v2_hw(struct hisi_hba *hisi_hba,
}
set_bit(start, bitmap);
- spin_unlock_irqrestore(&hisi_hba->lock, flags);
+ spin_unlock(&hisi_hba->lock);
return start;
}
@@ -843,9 +842,8 @@ hisi_sas_device *alloc_dev_quirk_v2_hw(struct domain_device *device)
struct hisi_sas_device *sas_dev = NULL;
int i, sata_dev = dev_is_sata(device);
int sata_idx = -1;
- unsigned long flags;
- spin_lock_irqsave(&hisi_hba->lock, flags);
+ spin_lock(&hisi_hba->lock);
if (sata_dev)
if (!sata_index_alloc_v2_hw(hisi_hba, &sata_idx))
@@ -876,7 +874,7 @@ hisi_sas_device *alloc_dev_quirk_v2_hw(struct domain_device *device)
}
out:
- spin_unlock_irqrestore(&hisi_hba->lock, flags);
+ spin_unlock(&hisi_hba->lock);
return sas_dev;
}
--
2.17.1
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