dmaengine: k3dma: 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/20201027215252.25820-7-song.bao.hua@hisilicon.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c
index f609a84..d0b2e60 100644 (file)
--- a/drivers/dma/k3dma.c
+++ b/drivers/dma/k3dma.c
@@ -223,24 +223,23 @@ static irqreturn_t k3_dma_int_handler(int irq, void *dev_id)
                i = __ffs(stat);
                stat &= ~BIT(i);
                if (likely(tc1 & BIT(i)) || (tc2 & BIT(i))) {
-                       unsigned long flags;
 
                        p = &d->phy[i];
                        c = p->vchan;
                        if (c && (tc1 & BIT(i))) {
-                               spin_lock_irqsave(&c->vc.lock, flags);
+                               spin_lock(&c->vc.lock);
                                if (p->ds_run != NULL) {
                                        vchan_cookie_complete(&p->ds_run->vd);
                                        p->ds_done = p->ds_run;
                                        p->ds_run = NULL;
                                }
-                               spin_unlock_irqrestore(&c->vc.lock, flags);
+                               spin_unlock(&c->vc.lock);
                        }
                        if (c && (tc2 & BIT(i))) {
-                               spin_lock_irqsave(&c->vc.lock, flags);
+                               spin_lock(&c->vc.lock);
                                if (p->ds_run != NULL)
                                        vchan_cyclic_callback(&p->ds_run->vd);
-                               spin_unlock_irqrestore(&c->vc.lock, flags);
+                               spin_unlock(&c->vc.lock);
                        }
                        irq_chan |= BIT(i);
                }