linux-kernel - [PATCH 4.19 086/118] dmaengine: imx-sdma: use GFP

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Date:   Tue, 11 Dec 2018 16:41:45 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Lucas Stach <l.stach@...gutronix.de>,
        Robin Gong <yibin.gong@....com>, Vinod Koul <vkoul@...nel.org>
Subject: [PATCH 4.19 086/118] dmaengine: imx-sdma: use GFP_NOWAIT for dma descriptor allocations

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

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

commit 64068853bc77786d1a28abb4087d6a3e93aedbe2 upstream.

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>
Cc: stable <stable@...r.kernel.org>
Signed-off-by: Vinod Koul <vkoul@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/dma/imx-sdma.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1214,7 +1214,7 @@ static int sdma_alloc_bd(struct sdma_des
 	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;