linux-kernel - [PATCH] dmaengine: xilinx_dma: Alloc tx descriptors GFP

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Date:   Fri, 29 Jan 2021 17:08:00 +0000
From:   Richard Fitzgerald <rf@...nsource.cirrus.com>
To:     <vkoul@...nel.org>, <michal.simek@...inx.com>
CC:     <dmaengine@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <patches@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>
Subject: [PATCH] dmaengine: xilinx_dma: Alloc tx descriptors GFP_NOWAIT

Use GFP_NOWAIT allocation in xilinx_dma_alloc_tx_descriptor().

This is necessary for compatibility with ALSA, which calls
dmaengine_prep_dma_cyclic() from an atomic context.

Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
---
 drivers/dma/xilinx/xilinx_dma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 22faea653ea8..fb046af9ac53 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -800,7 +800,7 @@ xilinx_dma_alloc_tx_descriptor(struct xilinx_dma_chan *chan)
 {
 	struct xilinx_dma_tx_descriptor *desc;
 
-	desc = kzalloc(sizeof(*desc), GFP_KERNEL);
+	desc = kzalloc(sizeof(*desc), GFP_NOWAIT);
 	if (!desc)
 		return NULL;
 
-- 
2.20.1