From: Barry Song <song.bao.hua@hisilicon.com>
To: <vkoul@kernel.org>, <dmaengine@vger.kernel.org>
Cc: <linuxarm@huawei.com>, Barry Song <song.bao.hua@hisilicon.com>
Subject: [PATCH v2 06/10] dmaengine: k3dma: remove redundant irqsave and irqrestore in hardIRQ
Date: Wed, 28 Oct 2020 10:52:48 +1300 [thread overview]
Message-ID: <20201027215252.25820-7-song.bao.hua@hisilicon.com> (raw)
In-Reply-To: <20201027215252.25820-1-song.bao.hua@hisilicon.com>
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>
---
drivers/dma/k3dma.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c
index f609a84c493c..d0b2e601e3e5 100644
--- a/drivers/dma/k3dma.c
+++ b/drivers/dma/k3dma.c
@@ -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);
}
--
2.25.1
next prev parent reply other threads:[~2020-10-27 21:56 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-27 21:52 [PATCH v2 00/10] dmaengine: a bundle of cleanup on spin_lock_irqsave/irqrestore Barry Song
2020-10-27 21:52 ` [PATCH v2 01/10] dmaengine: ipu_idmac: remove redundant irqsave and restore in hardIRQ Barry Song
2020-10-27 21:52 ` [PATCH v2 02/10] dmaengine: ti: k3-udma: remove redundant irqsave and irqrestore " Barry Song
2020-10-27 21:52 ` [PATCH v2 03/10] dmaengine: sf-pdma: " Barry Song
2020-10-27 21:52 ` [PATCH v2 04/10] dmaengine: tegra210-adma: " Barry Song
2020-10-27 21:52 ` [PATCH v2 05/10] dmaengine: milbeaut-xdmac: " Barry Song
2020-10-27 21:52 ` Barry Song [this message]
2020-10-27 21:52 ` [PATCH v2 07/10] dmaengine: hisi_dma: " Barry Song
2020-10-27 21:52 ` [PATCH v2 08/10] dmaengine: moxart-dma: " Barry Song
2020-10-27 21:52 ` [PATCH v2 09/10] dmaengine: ste_dma40: " Barry Song
2020-11-05 13:48 ` Linus Walleij
2020-10-27 21:52 ` [PATCH v2 10/10] dmaengine: pxa_dma: " Barry Song
2020-11-09 11:56 ` [PATCH v2 00/10] dmaengine: a bundle of cleanup on spin_lock_irqsave/irqrestore Vinod Koul
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