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dmaengine: tegra-apb: Don't save/restore IRQ flags in interrupt handler

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The interrupt is already disabled while interrupt handler is running, and
thus, there is no need to save/restore the IRQ flags within the spinlock.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20200319212321.3297-1-digetx@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Dmitry Osipenko 2020-03-20 00:23:20 +03:00 committed by Vinod Koul
parent a48d44c800
commit 6de88ea4ff
1 changed files with 3 additions and 4 deletions
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7
drivers/dma/tegra20-apb-dma.c
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@ -670,10 +670,9 @@ static void tegra_dma_tasklet(unsigned long data)
static irqreturn_t tegra_dma_isr(int irq, void *dev_id)
{
struct tegra_dma_channel *tdc = dev_id;
unsigned long flags;
u32 status;
spin_lock_irqsave(&tdc->lock, flags);
spin_lock(&tdc->lock);
trace_tegra_dma_isr(&tdc->dma_chan, irq);
status = tdc_read(tdc, TEGRA_APBDMA_CHAN_STATUS);
@ -681,11 +680,11 @@ static irqreturn_t tegra_dma_isr(int irq, void *dev_id)
tdc_write(tdc, TEGRA_APBDMA_CHAN_STATUS, status);
tdc->isr_handler(tdc, false);
tasklet_schedule(&tdc->tasklet);
spin_unlock_irqrestore(&tdc->lock, flags);
spin_unlock(&tdc->lock);
return IRQ_HANDLED;
}
spin_unlock_irqrestore(&tdc->lock, flags);
spin_unlock(&tdc->lock);
dev_info(tdc2dev(tdc), "Interrupt already served status 0x%08x\n",
status);