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dmaengine: k3dma: remove redundant irqsave and irqrestore in hardIRQ

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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>
This commit is contained in:
Barry Song
2020-10-28 10:52:48 +13:00
committed by Vinod Koul
parent 280e7f90d4
commit 1ff2065619
1 changed files with 4 additions and 5 deletions
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9
drivers/dma/k3dma.c
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@@ -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);
}