dmaengine: sf-pdma: 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>
Cc: Green Wan <green.wan@sifive.com>
Link: https://lore.kernel.org/r/20201027215252.25820-4-song.bao.hua@hisilicon.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/sf-pdma/sf-pdma.c b/drivers/dma/sf-pdma/sf-pdma.c
index 528deb5d9f3147065800a7558752d67255bcb530..981ddcc42d70f881e18a1addc843c229b825ff0a 100644 (file)
--- a/drivers/dma/sf-pdma/sf-pdma.c
+++ b/drivers/dma/sf-pdma/sf-pdma.c
@@ -326,10 +326,9 @@ static irqreturn_t sf_pdma_done_isr(int irq, void *dev_id)
 {
        struct sf_pdma_chan *chan = dev_id;
        struct pdma_regs *regs = &chan->regs;
-       unsigned long flags;
        u64 residue;
 
-       spin_lock_irqsave(&chan->vchan.lock, flags);
+       spin_lock(&chan->vchan.lock);
        writel((readl(regs->ctrl)) & ~PDMA_DONE_STATUS_MASK, regs->ctrl);
        residue = readq(regs->residue);
 
@@ -346,7 +345,7 @@ static irqreturn_t sf_pdma_done_isr(int irq, void *dev_id)
                sf_pdma_xfer_desc(chan);
        }
 
-       spin_unlock_irqrestore(&chan->vchan.lock, flags);
+       spin_unlock(&chan->vchan.lock);
 
        return IRQ_HANDLED;
 }
@@ -355,11 +354,10 @@ static irqreturn_t sf_pdma_err_isr(int irq, void *dev_id)
 {
        struct sf_pdma_chan *chan = dev_id;
        struct pdma_regs *regs = &chan->regs;
-       unsigned long flags;
 
-       spin_lock_irqsave(&chan->lock, flags);
+       spin_lock(&chan->lock);
        writel((readl(regs->ctrl)) & ~PDMA_ERR_STATUS_MASK, regs->ctrl);
-       spin_unlock_irqrestore(&chan->lock, flags);
+       spin_unlock(&chan->lock);
 
        tasklet_schedule(&chan->err_tasklet);