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dmaengine: tegra210-adma: 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>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Cc: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Link: https://lore.kernel.org/r/20201027215252.25820-5-song.bao.hua@hisilicon.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
zero-sugar-mainline-defconfig
Barry Song 2020-10-28 10:52:46 +13:00 committed by Vinod Koul
parent 302b3b3823
commit 654115e3f6
1 changed files with 3 additions and 4 deletions
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7
drivers/dma/tegra210-adma.c
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@ -408,19 +408,18 @@ static irqreturn_t tegra_adma_isr(int irq, void *dev_id)
{
struct tegra_adma_chan *tdc = dev_id;
unsigned long status;
unsigned long flags;
spin_lock_irqsave(&tdc->vc.lock, flags);
spin_lock(&tdc->vc.lock);
status = tegra_adma_irq_clear(tdc);
if (status == 0 || !tdc->desc) {
spin_unlock_irqrestore(&tdc->vc.lock, flags);
spin_unlock(&tdc->vc.lock);
return IRQ_NONE;
}
vchan_cyclic_callback(&tdc->desc->vd);
spin_unlock_irqrestore(&tdc->vc.lock, flags);
spin_unlock(&tdc->vc.lock);
return IRQ_HANDLED;
}