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From: Barry Song <song.bao.hua@hisilicon.com>
To: <vkoul@kernel.org>, <dmaengine@vger.kernel.org>
Cc: Barry Song <song.bao.hua@hisilicon.com>,
	Peter Ujfalusi <peter.ujfalusi@ti.com>
Subject: [PATCH 02/10] dmaengine: k3-udma: remove redundant irqsave and irqrestore in hardIRQ
Date: Fri, 16 Oct 2020 12:59:13 +1300
Message-ID: <20201015235921.21224-3-song.bao.hua@hisilicon.com> (raw)
In-Reply-To: <20201015235921.21224-1-song.bao.hua@hisilicon.com>

Running in hardIRQ, disabling IRQ is redundant.

Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
---
 drivers/dma/ti/k3-udma.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 82cf6c77f5c9..e508280b3d70 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -1020,13 +1020,12 @@ static irqreturn_t udma_ring_irq_handler(int irq, void *data)
 {
 	struct udma_chan *uc = data;
 	struct udma_desc *d;
-	unsigned long flags;
 	dma_addr_t paddr = 0;
 
 	if (udma_pop_from_ring(uc, &paddr) || !paddr)
 		return IRQ_HANDLED;
 
-	spin_lock_irqsave(&uc->vc.lock, flags);
+	spin_lock(&uc->vc.lock);
 
 	/* Teardown completion message */
 	if (cppi5_desc_is_tdcm(paddr)) {
@@ -1077,7 +1076,7 @@ static irqreturn_t udma_ring_irq_handler(int irq, void *data)
 		}
 	}
 out:
-	spin_unlock_irqrestore(&uc->vc.lock, flags);
+	spin_unlock(&uc->vc.lock);
 
 	return IRQ_HANDLED;
 }
@@ -1086,9 +1085,8 @@ static irqreturn_t udma_udma_irq_handler(int irq, void *data)
 {
 	struct udma_chan *uc = data;
 	struct udma_desc *d;
-	unsigned long flags;
 
-	spin_lock_irqsave(&uc->vc.lock, flags);
+	spin_lock(&uc->vc.lock);
 	d = uc->desc;
 	if (d) {
 		d->tr_idx = (d->tr_idx + 1) % d->sglen;
@@ -1103,7 +1101,7 @@ static irqreturn_t udma_udma_irq_handler(int irq, void *data)
 		}
 	}
 
-	spin_unlock_irqrestore(&uc->vc.lock, flags);
+	spin_unlock(&uc->vc.lock);
 
 	return IRQ_HANDLED;
 }
-- 
2.25.1


  parent reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-15 23:59 [PATCH 00/10] dmaengine: a bundle of cleanup on spin_lock_irqsave/irqrestore Barry Song
2020-10-15 23:59 ` [PATCH 01/10] dmaengine: ipu_idmac: remove redundant irqsave and restore in hardIRQ Barry Song
2020-10-15 23:59 ` Barry Song [this message]
2020-10-19 13:45   ` [PATCH 02/10] dmaengine: k3-udma: remove redundant irqsave and irqrestore " Peter Ujfalusi
2020-10-15 23:59 ` [PATCH 03/10] dmaengine: sf-pdma: " Barry Song
2020-10-15 23:59 ` [PATCH 04/10] dmaengine: tegra210-adma: " Barry Song
2020-10-19 10:31   ` Jon Hunter
2020-10-15 23:59 ` [PATCH 05/10] dmaengine: milbeaut-xdmac: " Barry Song
2020-10-15 23:59 ` [PATCH 06/10] dmaengine: k3dma: " Barry Song
2020-10-15 23:59 ` [PATCH 07/10] dmaengine: hisi_dma: " Barry Song
2020-10-26  1:23   ` Zhou Wang
2020-10-15 23:59 ` [PATCH 08/10] dmaengine: moxart-dma: " Barry Song
2020-10-15 23:59 ` [PATCH 09/10] dmaengine: ste_dma40: " Barry Song
2020-10-29 14:01   ` Linus Walleij
2020-10-29 20:58     ` Song Bao Hua (Barry Song)
2020-10-15 23:59 ` [PATCH 10/10] dmaengine: pxa_dma: " Barry Song
2020-10-23 20:16   ` Robert Jarzmik

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