linux-kernel - [PATCH AUTOSEL for 4.4 04/28] dmaengine: zx: set DMA_CYCLIC cap

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Message-ID: <20171115024551.5988-4-alexander.levin@verizon.com>
Date:   Wed, 15 Nov 2017 02:45:59 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Shawn Guo <shawn.guo@...aro.org>,
        Vinod Koul <vinod.koul@...el.com>, alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.4 04/28] dmaengine: zx: set DMA_CYCLIC cap_mask
 bit

From: Shawn Guo <shawn.guo@...aro.org>

[ Upstream commit fc318d64f3d91e15babac00e08354b1beb650b57 ]

The zx_dma driver supports cyclic transfer mode.  Let's set DMA_CYCLIC
cap_mask bit to make that clear, and avoid unnecessary failure when
clients request channel via dma_request_chan_by_mask() with DMA_CYCLIC
bit set in mask.

Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
Reviewed-by: Jun Nie <jun.nie@...aro.org>
Signed-off-by: Vinod Koul <vinod.koul@...el.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/dma/zx296702_dma.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/zx296702_dma.c b/drivers/dma/zx296702_dma.c
index 245d759d5ffc..6059d81e701a 100644
--- a/drivers/dma/zx296702_dma.c
+++ b/drivers/dma/zx296702_dma.c
@@ -813,6 +813,7 @@ static int zx_dma_probe(struct platform_device *op)
 	INIT_LIST_HEAD(&d->slave.channels);
 	dma_cap_set(DMA_SLAVE, d->slave.cap_mask);
 	dma_cap_set(DMA_MEMCPY, d->slave.cap_mask);
+	dma_cap_set(DMA_CYCLIC, d->slave.cap_mask);
 	dma_cap_set(DMA_PRIVATE, d->slave.cap_mask);
 	d->slave.dev = &op->dev;
 	d->slave.device_free_chan_resources = zx_dma_free_chan_resources;
-- 
2.11.0