linux-kernel - [PATCH 07/14] staging: fsl-mc: set up coherent dma ops for added devices

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Message-ID: <1460393353-15968-1-git-send-email-stuart.yoder@nxp.com>
Date:	Mon, 11 Apr 2016 11:49:13 -0500
From:	Stuart Yoder <stuart.yoder@....com>
To:	<gregkh@...uxfoundation.org>, <german.rivera@....com>
CC:	<devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>,
	<agraf@...e.de>, <arnd@...db.de>, <leoyang.li@....com>,
	Stuart Yoder <stuart.yoder@....com>
Subject: [PATCH 07/14] staging: fsl-mc: set up coherent dma ops for added devices

From: Stuart Yoder <stuart.yoder@....com>

Unless discovered devices have the no shareability flag set,
set up coherent dma ops for them.

Signed-off-by: Stuart Yoder <stuart.yoder@....com>
---
 drivers/staging/fsl-mc/bus/mc-bus.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/staging/fsl-mc/bus/mc-bus.c b/drivers/staging/fsl-mc/bus/mc-bus.c
index 981e4c2..8bf76d7 100644
--- a/drivers/staging/fsl-mc/bus/mc-bus.c
+++ b/drivers/staging/fsl-mc/bus/mc-bus.c
@@ -469,6 +469,10 @@ int fsl_mc_device_add(struct dprc_obj_desc *obj_desc,
 			goto error_cleanup_dev;
 	}
 
+	/* Objects are coherent, unless 'no shareability' flag set. */
+	if (!(obj_desc->flags & DPRC_OBJ_FLAG_NO_MEM_SHAREABILITY))
+		arch_setup_dma_ops(&mc_dev->dev, 0, 0, NULL, true);
+
 	/*
 	 * The device-specific probe callback will get invoked by device_add()
 	 */
-- 
1.7.9.5