[PATCH] scsi: megaraid_sas: use spin_lock() in hard IRQ

[Xianting Tian]

Since we already in hard IRQ context when running megasas_isr(), so use
spin_lock() is enough, which is faster than spin_lock_irqsave().

Signed-off-by: Xianting Tian <tian.xiant...@h3c.com>
---
 drivers/scsi/megaraid/megaraid_sas_base.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c 
b/drivers/scsi/megaraid/megaraid_sas_base.c
index 2b7e7b5f3..bd186254d 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -3977,15 +3977,14 @@ static irqreturn_t megasas_isr(int irq, void *devp)
 {
        struct megasas_irq_context *irq_context = devp;
        struct megasas_instance *instance = irq_context->instance;
-       unsigned long flags;
        irqreturn_t rc;
 
        if (atomic_read(&instance->fw_reset_no_pci_access))
                return IRQ_HANDLED;
 
-       spin_lock_irqsave(&instance->hba_lock, flags);
+       spin_lock(&instance->hba_lock);
        rc = megasas_deplete_reply_queue(instance, DID_OK);
-       spin_unlock_irqrestore(&instance->hba_lock, flags);
+       spin_unlock(&instance->hba_lock);
 
        return rc;
 }
-- 
2.17.1