linux-kernel - [PATCH 4.9 100/138] dmaengine: zx: set DMA_CYCLIC cap

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Message-Id: <20171128100552.634784244@linuxfoundation.org>
Date:   Tue, 28 Nov 2017 11:23:21 +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, Shawn Guo <shawn.guo@...aro.org>,
        Jun Nie <jun.nie@...aro.org>,
        Vinod Koul <vinod.koul@...el.com>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.9 100/138] dmaengine: zx: set DMA_CYCLIC cap_mask bit

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

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

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/dma/zx296702_dma.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/dma/zx296702_dma.c
+++ b/drivers/dma/zx296702_dma.c
@@ -813,6 +813,7 @@ static int zx_dma_probe(struct platform_
 	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;