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dmaengine: pxa_dma: 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>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Daniel Mack <daniel@zonque.org>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Link: https://lore.kernel.org/r/20201027215252.25820-11-song.bao.hua@hisilicon.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Barry Song
2020-10-28 10:52:52 +13:00
committed by Vinod Koul
parent 618a8e383b
commit 0e15ca5fe2
1 changed files with 2 additions and 3 deletions
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5
drivers/dma/pxa_dma.c
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@@ -606,7 +606,6 @@ static irqreturn_t pxad_chan_handler(int irq, void *dev_id)
struct pxad_chan *chan = phy->vchan;
struct virt_dma_desc *vd, *tmp;
unsigned int dcsr;
unsigned long flags;
bool vd_completed;
dma_cookie_t last_started = 0;
@@ -616,7 +615,7 @@ static irqreturn_t pxad_chan_handler(int irq, void *dev_id)
if (dcsr & PXA_DCSR_RUN)
return IRQ_NONE;
spin_lock_irqsave(&chan->vc.lock, flags);
spin_lock(&chan->vc.lock);
list_for_each_entry_safe(vd, tmp, &chan->vc.desc_issued, node) {
vd_completed = is_desc_completed(vd);
dev_dbg(&chan->vc.chan.dev->device,
@@ -658,7 +657,7 @@ static irqreturn_t pxad_chan_handler(int irq, void *dev_id)
pxad_launch_chan(chan, to_pxad_sw_desc(vd));
}
}
spin_unlock_irqrestore(&chan->vc.lock, flags);
spin_unlock(&chan->vc.lock);
wake_up(&chan->wq_state);
return IRQ_HANDLED;