linux-kernel - [RFC 6/6] dmaengine: xilinx_dma: Use tasklet_hi

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Date:   Mon, 2 Apr 2018 16:09:06 +0530
From:   Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
To:     <vinod.koul@...el.com>, <dan.j.williams@...el.com>,
        <michal.simek@...inx.com>, <appana.durga.rao@...inx.com>,
        <radheys@...inx.com>, <lars@...afoo.de>
CC:     <dmaengine@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [RFC 6/6] dmaengine: xilinx_dma: Use tasklet_hi_schedule for timing critical usecase

Schedule tasklet with high priority to ensure that callback processing
is prioritized. It improves throughput for netdev dma clients.

Signed-off-by: Radhey Shyam Pandey <radheys@...inx.com>
---
 drivers/dma/xilinx/xilinx_dma.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index ab8f1b0..d45224d 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -1536,7 +1536,7 @@ static irqreturn_t xilinx_dma_irq_handler(int irq, void *data)
 		spin_unlock(&chan->lock);
 	}
 
-	tasklet_schedule(&chan->tasklet);
+	tasklet_hi_schedule(&chan->tasklet);
 	return IRQ_HANDLED;
 }
 
-- 
1.7.1