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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>
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
View File

@ -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);
}