[PATCH 03/19] scsi: hisi_sas: use spin_lock_irqsave() for hisi_hba.lock

[John Garry]

From: Xiaofei Tan <tanxiao...@huawei.com>

We used spin_lock() to grab hisi_hba.lock in two places
where spin_lock_irqsave() should be used, as
hisi_hba.lock can be taken in interrupt context.

This patch is to fix this.

Signed-off-by: Xiaofei Tan <tanxiao...@huawei.com>
Signed-off-by: John Garry <john.ga...@huawei.com>
---
 drivers/scsi/hisi_sas/hisi_sas_main.c  | 5 +++--
 drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 5 +++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c 
b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 0eb9174..e038bdf 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -505,9 +505,10 @@ 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 i;
 
-       spin_lock(&hisi_hba->lock);
+       spin_lock_irqsave(&hisi_hba->lock, flags);
        for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
                if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
                        int queue = i % hisi_hba->queue_count;
@@ -524,7 +525,7 @@ static struct hisi_sas_device *hisi_sas_alloc_dev(struct 
domain_device *device)
                        break;
                }
        }
-       spin_unlock(&hisi_hba->lock);
+       spin_unlock_irqrestore(&hisi_hba->lock, flags);
 
        return sas_dev;
 }
diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c 
b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
index 779af97..73d12ff 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -843,8 +843,9 @@ 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(&hisi_hba->lock);
+       spin_lock_irqsave(&hisi_hba->lock, flags);
 
        if (sata_dev)
                if (!sata_index_alloc_v2_hw(hisi_hba, &sata_idx))
@@ -874,7 +875,7 @@ hisi_sas_device *alloc_dev_quirk_v2_hw(struct domain_device 
*device)
        }
 
 out:
-       spin_unlock(&hisi_hba->lock);
+       spin_unlock_irqrestore(&hisi_hba->lock, flags);
 
        return sas_dev;
 }
-- 
1.9.1