linux-kernel - [PATCH v3 4/4] dmaengine: imx-sdma: use GFP

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Date:   Tue, 6 Nov 2018 03:40:37 +0000
From:   Robin Gong <yibin.gong@....com>
To:     "vkoul@...nel.org" <vkoul@...nel.org>,
        "l.stach@...gutronix.de" <l.stach@...gutronix.de>
CC:     "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: [PATCH v3 4/4] dmaengine: imx-sdma: use GFP_NOWAIT for dma descriptor
 allocations

From: Lucas Stach <l.stach@...gutronix.de>

DMA buffer descriptors aren't allocated from atomic context, so they
can use the less heavyweigth GFP_NOWAIT.

Signed-off-by: Lucas Stach <l.stach@...gutronix.de>
Signed-off-by: Robin Gong <yibin.gong@....com>
---
 drivers/dma/imx-sdma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 03d46f1..cb1b44d 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1214,7 +1214,7 @@ static int sdma_alloc_bd(struct sdma_desc *desc)
 	int ret = 0;
 
 	desc->bd = dma_zalloc_coherent(NULL, bd_size, &desc->bd_phys,
-					GFP_ATOMIC);
+					GFP_NOWAIT);
 	if (!desc->bd) {
 		ret = -ENOMEM;
 		goto out;
-- 
2.7.4