i2c: busses: replace spin_lock_irqsave by spin_lock in hard IRQ

The code has been in a irq-disabled context since it is hard IRQ. There
is no necessity to do it again.
Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
Reviewed-by: Akash Asthana <akashast@codeaurora.org>
Reviewed-by: Mukesh Kumar Savaliya <msavaliy@codeaurora.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

drivers/i2c/busses/i2c-mv64xxx.c

@@ -496,11 +496,10 @@ static irqreturn_t
 mv64xxx_i2c_intr(int irq, void *dev_id)
 {
 	struct mv64xxx_i2c_data	*drv_data = dev_id;
-	unsigned long	flags;
 	u32		status;
 	irqreturn_t	rc = IRQ_NONE;
 
-	spin_lock_irqsave(&drv_data->lock, flags);
+	spin_lock(&drv_data->lock);
 
 	if (drv_data->offload_enabled)
 		rc = mv64xxx_i2c_intr_offload(drv_data);
@@ -517,7 +516,7 @@ mv64xxx_i2c_intr(int irq, void *dev_id)
 
 		rc = IRQ_HANDLED;
 	}
-	spin_unlock_irqrestore(&drv_data->lock, flags);
+	spin_unlock(&drv_data->lock);
 
 	return rc;
 }

drivers/i2c/busses/i2c-owl.c

@@ -165,10 +165,9 @@ static irqreturn_t owl_i2c_interrupt(int irq, void *_dev)
 {
 	struct owl_i2c_dev *i2c_dev = _dev;
 	struct i2c_msg *msg = i2c_dev->msg;
-	unsigned long flags;
 	unsigned int stat, fifostat;
 
-	spin_lock_irqsave(&i2c_dev->lock, flags);
+	spin_lock(&i2c_dev->lock);
 
 	i2c_dev->err = 0;
 
@@ -208,7 +207,7 @@ static irqreturn_t owl_i2c_interrupt(int irq, void *_dev)
 			   OWL_I2C_STAT_IRQP, true);
 
 	complete_all(&i2c_dev->msg_complete);
-	spin_unlock_irqrestore(&i2c_dev->lock, flags);
+	spin_unlock(&i2c_dev->lock);
 
 	return IRQ_HANDLED;
 }

drivers/i2c/busses/i2c-qcom-geni.c

@@ -210,9 +210,8 @@ static irqreturn_t geni_i2c_irq(int irq, void *dev)
 	u32 dma;
 	u32 val;
 	struct i2c_msg *cur;
-	unsigned long flags;
 
-	spin_lock_irqsave(&gi2c->lock, flags);
+	spin_lock(&gi2c->lock);
 	m_stat = readl_relaxed(base + SE_GENI_M_IRQ_STATUS);
 	rx_st = readl_relaxed(base + SE_GENI_RX_FIFO_STATUS);
 	dm_tx_st = readl_relaxed(base + SE_DMA_TX_IRQ_STAT);
@@ -294,7 +293,7 @@ static irqreturn_t geni_i2c_irq(int irq, void *dev)
 	    dm_rx_st & RX_DMA_DONE || dm_rx_st & RX_RESET_DONE)
 		complete(&gi2c->done);
 
-	spin_unlock_irqrestore(&gi2c->lock, flags);
+	spin_unlock(&gi2c->lock);
 
 	return IRQ_HANDLED;
 }