[PATCH v2 09/10] dmaengine: ste_dma40: remove redundant irqsave and irqrestore in hardIRQ

[Barry Song <song.bao.hua@hisilicon.com>]

Running in hardIRQ, disabling IRQ is redundant since hardIRQ has disabled
IRQ. This patch removes the irqsave and irqstore to save some instruction
cycles.

Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
---
 drivers/dma/ste_dma40.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 77ab1f4730be..4256e55bbf25 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -1643,13 +1643,12 @@ static irqreturn_t d40_handle_interrupt(int irq, void *data)
 	u32 row;
 	long chan = -1;
 	struct d40_chan *d40c;
-	unsigned long flags;
 	struct d40_base *base = data;
 	u32 *regs = base->regs_interrupt;
 	struct d40_interrupt_lookup *il = base->gen_dmac.il;
 	u32 il_size = base->gen_dmac.il_size;
 
-	spin_lock_irqsave(&base->interrupt_lock, flags);
+	spin_lock(&base->interrupt_lock);
 
 	/* Read interrupt status of both logical and physical channels */
 	for (i = 0; i < il_size; i++)
@@ -1694,7 +1693,7 @@ static irqreturn_t d40_handle_interrupt(int irq, void *data)
 		spin_unlock(&d40c->lock);
 	}
 
-	spin_unlock_irqrestore(&base->interrupt_lock, flags);
+	spin_unlock(&base->interrupt_lock);
 
 	return IRQ_HANDLED;
 }
-- 
2.25.1