dmaengine: moxart-dma: 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/20201027215252.25820-9-song.bao.hua@hisilicon.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/moxart-dma.c b/drivers/dma/moxart-dma.c
index 347146a..7475509 100644 (file)
--- a/drivers/dma/moxart-dma.c
+++ b/drivers/dma/moxart-dma.c
@@ -524,7 +524,6 @@ static irqreturn_t moxart_dma_interrupt(int irq, void *devid)
        struct moxart_dmadev *mc = devid;
        struct moxart_chan *ch = &mc->slave_chans[0];
        unsigned int i;
-       unsigned long flags;
        u32 ctrl;
 
        dev_dbg(chan2dev(&ch->vc.chan), "%s\n", __func__);
@@ -541,14 +540,14 @@ static irqreturn_t moxart_dma_interrupt(int irq, void *devid)
                if (ctrl & APB_DMA_FIN_INT_STS) {
                        ctrl &= ~APB_DMA_FIN_INT_STS;
                        if (ch->desc) {
-                               spin_lock_irqsave(&ch->vc.lock, flags);
+                               spin_lock(&ch->vc.lock);
                                if (++ch->sgidx < ch->desc->sglen) {
                                        moxart_dma_start_sg(ch, ch->sgidx);
                                } else {
                                        vchan_cookie_complete(&ch->desc->vd);
                                        moxart_dma_start_desc(&ch->vc.chan);
                                }
-                               spin_unlock_irqrestore(&ch->vc.lock, flags);
+                               spin_unlock(&ch->vc.lock);
                        }
                }