dmaengine: milbeaut-xdmac: remove redundant irqsave and irqrestore in hardIRQ

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

Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
Link: https://lore.kernel.org/r/20201027215252.25820-6-song.bao.hua@hisilicon.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/milbeaut-xdmac.c b/drivers/dma/milbeaut-xdmac.c
index 85a597228fb04bb89bcc0500092ed41c0059f196..584c931e807af3a824a1bd0adefec70195c7e6bc 100644 (file)
--- a/drivers/dma/milbeaut-xdmac.c
+++ b/drivers/dma/milbeaut-xdmac.c
@@ -160,10 +160,9 @@ static irqreturn_t milbeaut_xdmac_interrupt(int irq, void *dev_id)
 {
        struct milbeaut_xdmac_chan *mc = dev_id;
        struct milbeaut_xdmac_desc *md;
-       unsigned long flags;
        u32 val;
 
-       spin_lock_irqsave(&mc->vc.lock, flags);
+       spin_lock(&mc->vc.lock);
 
        /* Ack and Stop */
        val = FIELD_PREP(M10V_XDDSD_IS_MASK, 0x0);
@@ -177,7 +176,7 @@ static irqreturn_t milbeaut_xdmac_interrupt(int irq, void *dev_id)
 
        milbeaut_xdmac_start(mc);
 out:
-       spin_unlock_irqrestore(&mc->vc.lock, flags);
+       spin_unlock(&mc->vc.lock);
        return IRQ_HANDLED;
 }