Commit 0e15ca5f authored by Barry Song's avatar Barry Song Committed by Vinod Koul
Browse files

dmaengine: pxa_dma: 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: default avatarBarry Song <song.bao.hua@hisilicon.com>
Acked-by: default avatarRobert 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: default avatarVinod Koul <vkoul@kernel.org>
parent 618a8e38

drivers/dma/pxa_dma.c

+2 −3
Original line number Diff line number Diff line
@@ -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;